Merge branch 'dev0.8.0' of github.com:fastnlp/fastNLP into dev0.8.0

fastNLP/core/callbacks/__init__.py

@@ -10,7 +10,8 @@ __all__ = [
     'ProgressCallback',
     'RichCallback',
     "LRSchedCallback",
-    'LoadBestModelCallback'
+    'LoadBestModelCallback',
+    "EarlyStopCallback"
 ]
 
 
@@ -21,4 +22,5 @@ from .checkpoint_callback import ModelCheckpointCallback, TrainerCheckpointCallb
 from .progress_callback import choose_progress_callback, ProgressCallback, RichCallback
 from .lr_scheduler_callback import LRSchedCallback
 from .load_best_model_callback import LoadBestModelCallback
+from .early_stop_callback import EarlyStopCallback
 

fastNLP/core/callbacks/callback.py

@@ -1,11 +1,15 @@
-from typing import Union, Callable, Dict, Optional
+from typing import Union, Callable, Dict, Optional, Any
+from abc import ABC
 
 __all__ = [
     'Callback',
 ]
 
 from .callback_events import Events, EventsList, Filter
+from .utils import _get_monitor_value
 from fastNLP.core.callbacks.callback_events import _SingleEventState
+from fastNLP.core.log import logger
+from fastNLP.core.utils import apply_to_collection
 
 
 class Callback:
@@ -150,4 +154,82 @@ class _CallbackWrapper(Callback):
         return self.fn.__name__
 
 
+class CanItemDataType(ABC):
+    """
+    检测可以进行传输的对象。
 
+    """
+
+    @classmethod
+    def __subclasshook__(cls, subclass: Any) -> Union[bool, Any]:
+        if cls is CanItemDataType:
+            item = getattr(subclass, 'item', None)
+            return callable(item)
+        return NotImplemented
+
+
+class HasMonitorCallback(Callback):
+    def __init__(self, monitor, larger_better, must_have_monitor=False):
+        self.set_monitor(monitor, larger_better)
+        self.must_have_moinitor = must_have_monitor
+
+    def set_monitor(self, monitor, larger_better):
+        self.monitor = str(monitor) if monitor is not None else None
+        self.larger_better = bool(larger_better)
+        if larger_better:
+            self.monitor_value = float('-inf')
+        else:
+            self.monitor_value = float('inf')
+        self._real_monitor = self.monitor
+
+    def on_after_trainer_initialized(self, trainer, driver):
+        """
+        如果本身的 monitor 没有设置，则根据 Trainer 中的 monitor 设置 monitor 。
+        同时对于必须要有 monitor 设置的 callback ，该函数会进行检查。
+
+        :param trainer:
+        :param driver:
+        :return:
+        """
+        if self.monitor is None and trainer.monitor is not None:
+            self.set_monitor(monitor=trainer.monitor, larger_better=trainer.larger_better)
+        if self.must_have_moinitor and self.monitor is None:
+            raise RuntimeError(f"No `monitor` is set for {self.__class__.__name__}. "
+                               f"You can set it in the initialization or through Trainer.")
+
+    def get_monitor_value(self, results:Dict)->float:
+        """
+        获取 monitor 的值，如果 monitor 没有直接找到，会尝试使用匹配的方式寻找，并把匹配到的设置到 self._real_monitor 属性上。
+
+        :param results:
+        :return:
+        """
+        if len(results)==0:
+            return 0
+        # 保证所有的 tensor 都被转换为了 python 特定的类型
+        results = apply_to_collection(results, dtype=CanItemDataType, function=lambda x: x.item())
+        use_monitor, monitor_value = _get_monitor_value(monitor=self.monitor,
+                                                        real_monitor=self._real_monitor,
+                                                        res=results)
+        if self._real_monitor != use_monitor:  # 发生了替换需要打印
+            logger.warning(
+                f"We can not find `{self.monitor}` in the evaluation result (with keys as {list(results.keys())}), "
+                f"we use the `{use_monitor}` as the monitor for {self.__class__.__name__}.")
+        self._real_monitor = use_monitor
+        return monitor_value
+
+    def is_better_monitor_value(self, monitor_value: float, keep_if_better=True):
+        """
+        检测 monitor_value 是否是更好的
+
+        :param monitor_value:
+        :param keep_if_better: 如果传入的 monitor_value 值更好，则将其保存下来。
+        :return:
+        """
+        better = False
+        if (self.larger_better and monitor_value > self.monitor_value) or \
+            (not self.larger_better and monitor_value < self.monitor_value):
+            better = True
+            if keep_if_better:
+                self.monitor_value = monitor_value
+        return better

fastNLP/core/callbacks/checkpoint_callback.py

@@ -5,12 +5,12 @@ __all__ = [
 import os
 from typing import Union, Optional, Callable, Dict, Sequence, Any, Mapping
 from pathlib import Path
-from abc import ABC
 import sys
+from copy import deepcopy
 
 
 import fastNLP
-from .callback import Callback, Filter
+from .callback import Callback, HasMonitorCallback
 from fastNLP.core.callbacks.utils import _get_monitor_value
 from fastNLP.core.log import logger
 from fastNLP.envs import FASTNLP_LAUNCH_TIME
@@ -18,22 +18,7 @@ from fastNLP.core.utils import synchronize_safe_rm, synchronize_mkdir
 from fastNLP.core.utils import apply_to_collection
 
 
-class CanItemDataType(ABC):
-    """
-    检测可以进行传输的对象。
-
-    """
-
-    @classmethod
-    def __subclasshook__(cls, subclass: Any) -> Union[bool, Any]:
-        if cls is CanItemDataType:
-            item = getattr(subclass, 'item', None)
-            return callable(item)
-        return NotImplemented
-
-
-
-class CheckpointCallback(Callback):
+class CheckpointCallback(HasMonitorCallback):
     def __init__(
             self,
             monitor,
@@ -48,13 +33,8 @@ class CheckpointCallback(Callback):
             model_save_fn: Optional[Callable] = None,
             **kwargs,
     ):
-        # 我们新加了逻辑，如果 checkpoint callback 自己没有设置 monitor 和 larger_better，那么我们会将其在 trainer 中的设置赋值给它们；
-        # if monitor is None and save_topk is not None:
-        #     raise ValueError("Parameter `monitor` must be set when you want to use 'save_topk'.")
-
-        if monitor is not None and not isinstance(monitor, str):
-            raise ValueError("Parameter `monitor` should be of 'str' type.")
-
+        super().__init__(monitor=monitor, larger_better=larger_better,
+                         must_have_monitor=save_topk is not None)
         if save_folder is None:
             logger.warning(
                 "Parameter `path` is None, and we will use the current work directory to find and load your model.")
@@ -92,13 +72,12 @@ class CheckpointCallback(Callback):
                                     "`BaseException` type.")
         else:
             save_on_exception = []
-        self.monitor = monitor
+
         self.save_folder = Path(save_folder)
         self.save_every_n_epochs = save_every_n_epochs
         self.save_every_n_batches = save_every_n_batches
         self.save_last = save_last
         self.save_topk = save_topk
-        self.larger_better = larger_better
         self.only_state_dict = only_state_dict
         self.model_save_fn = model_save_fn
         self.save_on_exception = save_on_exception
@@ -108,12 +87,6 @@ class CheckpointCallback(Callback):
         self._topk_model = {}
         self._topn = 0  # 表示目前已经保存了几个最好的模型；
 
-        # 因为我们在 `_get_validate_metric` 函数中，当在返回的 `validate_res` 字典中找不到 `monitor` 时，是使用匹配找到的
-        #  key 对应的 value 当做结果；但是这样存在的一个问题在于如果用户传入的 metric 返回的 sub_metric 的名字可能会混淆，并且其在下一次
-        #  训练的代码中修改了这些 sub_metric 返回的顺序，那么就会导致模糊匹配拿到的 key 和 value 与之前的不是同一个，这显然不是合理的行为；
-        # 因此我们通过该变量来表示我们通过模糊匹配拿到的 key；
-        self._real_monitor = self.monitor
-
         # 注意这里应当保证只有进程 0 在执行这个操作，因为当用户使用 python -m torch.distributed.launch 来拉起进程的时候，
         #  FASTNLP_LAUNCH_TIME 在每一个进程上的值是不一样的；
         self.timestamp_path = self.save_folder.joinpath(os.environ[FASTNLP_LAUNCH_TIME])
@@ -121,20 +94,15 @@ class CheckpointCallback(Callback):
         synchronize_mkdir(self.timestamp_path)
 
     def on_after_trainer_initialized(self, trainer, driver):
-        if self.monitor is None:
-            if trainer.monitor is not None:
-                self.monitor = trainer.monitor
-                self.larger_better = trainer.larger_better
-            elif self.save_topk is not None:
-                raise RuntimeError("You are using `topk` mode, but you have not set the `monitor` value either in this"
-                                   "callback or in trainer.")
-            else:
-                self.monitor = None
+        if self.save_topk is not None:
+            super().on_after_trainer_initialized(trainer, driver)
         if self.save_topk is not None and trainer.evaluator is None:
-            raise RuntimeError("You are using `topk` mode, but there is no `evaluator` in trainer.")
+            logger.warning("You set `save_topk`, but `validate_dataloaders` is not set in Trainer.")
 
-    def on_validate_end(self, trainer, validate_res):
-        self._save_topk(trainer, validate_res)
+    def on_validate_end(self, trainer, results):
+        if len(results) == 0:
+            return
+        self._save_topk(trainer, results)
 
     def on_train_epoch_end(self, trainer: "fastNLP.Trainer"):
         if trainer.cur_epoch_idx % self.save_every_n_epochs == 0:
@@ -157,7 +125,7 @@ class CheckpointCallback(Callback):
 
     def on_sanity_check_end(self, trainer, sanity_check_res):
         # 主要核对一下 monitor 是否存在。
-        self._get_validate_metric(sanity_check_res)
+        self.get_monitor_value(results=sanity_check_res)
 
     def on_save_checkpoint(self, trainer) -> Dict:
         """
@@ -168,8 +136,7 @@ class CheckpointCallback(Callback):
 
         states = {}
         states['timestamp_path'] = str(self.timestamp_path.absolute())
-        states['_topk_model'] = apply_to_collection(self._topk_model, dtype=CanItemDataType,
-                                                    function=lambda x:x.item())
+        states['_topk_model'] = deepcopy(self._topk_model)
         states['save_topk'] = 0 if self.save_topk is None else self.save_topk
         states['_real_monitor'] = self._real_monitor
         return states
@@ -190,30 +157,30 @@ class CheckpointCallback(Callback):
             self._topk_model.update(self._topk_model)
         self._real_monitor = states["real_monitor"]
 
-    def _save_topk(self, trainer: "fastNLP.Trainer", validate_res: Dict):
+    def _save_topk(self, trainer: "fastNLP.Trainer", results: Dict):
         """
         根据validate_res决定保存哪些model的函数。会自动移除掉不满足topk的文件夹。
 
         :param trainer:
-        :param validate_res:
+        :param results:
         :return:
         """
         if self.save_topk is not None:
-            _metric_value = self._get_validate_metric(validate_res)
+            monitor_value = self.get_monitor_value(results=results)
             folder_name = f"{self.folder_prefix}-epoch_{trainer.cur_epoch_idx}-batch_{trainer.global_forward_batches}" \
-                         f"-{self._real_monitor}_{_metric_value}"
+                         f"-{self._real_monitor}_{monitor_value}"
 
             _should_save = False
             if self._topn < self.save_topk:
-                self._topk_model[folder_name] = _metric_value
+                self._topk_model[folder_name] = monitor_value
                 self._topn += 1
                 _should_save = True
             else:
                 _least_valuable_model = (min if self.larger_better else max)(self._topk_model,
                                                                              key=lambda x: self._topk_model[x])
-                if (self.larger_better and _metric_value > self._topk_model[_least_valuable_model]) or \
-                        (self.larger_better is False and _metric_value < self._topk_model[_least_valuable_model]):
-                    self._topk_model[folder_name] = _metric_value
+                if (self.larger_better and monitor_value > self._topk_model[_least_valuable_model]) or \
+                        (self.larger_better is False and monitor_value < self._topk_model[_least_valuable_model]):
+                    self._topk_model[folder_name] = monitor_value
                     _should_save = True
                     self._topk_model.pop(_least_valuable_model)
                     synchronize_safe_rm(self.timestamp_path.joinpath(_least_valuable_model))
@@ -249,7 +216,11 @@ class CheckpointCallback(Callback):
         :return:
         """
         use_monitor, value = _get_monitor_value(monitor=self.monitor, real_monitor=self._real_monitor, res=res)
+        if self._real_monitor != use_monitor:
+            logger.warning(f"We can not find `{self._real_monitor}` in the evaluation result (with keys as {list(res.keys())}), "
+                           f"we use the `{use_monitor}` as the monitor for {self.__class__.__name__}.")
         self._real_monitor = use_monitor
+
         return value
 
     @property
@@ -277,7 +248,7 @@ class ModelCheckpointCallback(CheckpointCallback):
     若 model_save_fn 不为 None，则 fastNLP 将 folder 绝对路径传递给该函数，fastNLP 不在该 folder 下创建任何文件。
 
     :param monitor: 监控的 metric 的名称。如果在 evaluation 结果中没有找到完全一致的名称，将使用 最短公共字符串算法 找到最匹配
-        的那个作为 monitor 。
+        的那个作为 monitor 。如果为 None 将尝试从 Trainer 中获取该值。
     :param save_folder: 保存的文件夹，fastNLP 将在该文件下以时间戳创建子文件夹，并在里面保存。因此不同次运行可以将被保存到不同的
         时间戳文件夹中。如果为 None ，默认使用当前文件夹。
     :param save_every_n_epochs: 多少个 epoch 保存一次。
@@ -324,7 +295,7 @@ class TrainerCheckpointCallback(CheckpointCallback):
     若 model_save_fn 不为 None，则 fastNLP 只会在每个 folder 下生成 fastnlp_trainer.pkl.tar 文件。
 
     :param monitor: 监控的 metric 的名称。如果在 evaluation 结果中没有找到完全一致的名称，将使用 最短公共字符串算法 找到最匹配
-        的那个作为 monitor 。
+        的那个作为 monitor 。如果为 None 将尝试从 Trainer 中获取该值。
     :param save_folder: 保存的文件夹，fastNLP 将在该文件下以时间戳创建子文件夹，并在里面保存。因此不同次运行可以将被保存到不同的
         时间戳文件夹中。如果为 None ，默认使用当前文件夹。
     :param save_every_n_epochs: 多少个 epoch 保存一次。

fastNLP/core/callbacks/early_stop_callback.py

@@ -0,0 +1,61 @@
+__all__ = [
+    'EarlyStopCallback'
+]
+
+from typing import Dict
+
+from .callback import HasMonitorCallback
+from fastNLP.core.utils.exceptions import EarlyStopException
+
+
+class EarlyStopCallback(HasMonitorCallback):
+    def __init__(self, monitor:str=None, larger_better:bool=True, patience:int=10):
+        """
+
+        :param str monitor: 监控的 metric 值。如果为 None，将尝试使用 Trainer 设置的 monitor 。
+        :param larger_better: monitor 的值是否是越大越好。
+        :param patience: 多少次 validate 不没有提升就停止。
+        """
+        super(EarlyStopCallback, self).__init__(monitor=monitor, larger_better=larger_better, must_have_monitor=True)
+        self.wait = 0
+        self.patience = patience
+
+    def on_validate_end(self, trainer, results):
+        if len(results)==0:
+            return
+        monitor_value = self.get_monitor_value(results)
+        if self.is_better_monitor_value(monitor_value, keep_if_better=True):
+            self.wait = 0
+        else:
+            self.wait += 1
+
+    def on_fetch_data_begin(self, trainer):
+        # 当是 step validate 的时候，下一步执行的就是这个， 所以在这里检查。
+        if self.wait >= self.patience:
+            raise EarlyStopException(f"After {self.wait} validations, no improvement for "
+                                 f"metric `{self._real_monitor}`")
+
+    def on_train_epoch_begin(self, trainer):
+        # 当是 epoch validate 的时候，下一步执行的就是这个， 所以在这里检查。
+        if self.wait >= self.patience:
+            raise EarlyStopException(f"After {self.wait} validations, no improvement for "
+                                     f"metric `{self._real_monitor}`(best value: {self.monitor_value})")
+
+    def on_save_checkpoint(self, trainer) -> Dict:
+        states = {
+            'patience': self.patience,
+            'wait': self.wait,
+            'monitor': self.monitor,
+            'monitor_value': self.monitor_value
+        }
+        return states
+
+    def on_load_checkpoint(self, trainer, states):
+        self.patience = states['patience']
+        self.wait = states['wait']
+        self.monitor = states['monitor']
+        self.monitor_value = float(states['monitor_value'])
+
+    def callback_name(self):
+        return f'EarlyStopCallback#monitor-{self.monitor}#patience-{self.patience}'
+

fastNLP/core/callbacks/load_best_model_callback.py

@@ -4,8 +4,7 @@ __all__ = [
 
 import os
 from typing import Optional, Callable
-from .callback import Callback
-from .utils import _get_monitor_value
+from .callback import HasMonitorCallback
 from io import BytesIO
 import shutil
 
@@ -14,15 +13,15 @@ from fastNLP.core.log import logger
 from fastNLP.envs import all_rank_call
 
 
-class LoadBestModelCallback(Callback):
-    def __init__(self, monitor:str, larger_better:bool = True, only_state_dict:bool = True,
+class LoadBestModelCallback(HasMonitorCallback):
+    def __init__(self, monitor:str=None, larger_better:bool = True, only_state_dict:bool = True,
                  save_folder:Optional[str] = None, model_save_fn:Optional[Callable] = None,
                  model_load_fn:Optional[Callable] = None,
                  delete_after_train:bool = True):
         """
         保存最佳的 monitor 值最佳的模型，并在训练结束的时候重新加载模型。仅在训练正常结束的时候才能加载最好的模型。
 
-        :param str monitor: 监控的 metric 值。
+        :param str monitor: 监控的 metric 值。如果为 None，将尝试使用 Trainer 设置的 monitor 。
         :param larger_better: 该 metric 值是否是越大越好。
         :param save_folder: 保存的文件夹，如果为空，则保存在内存中。不为空，则保存一份权重到文件中，当为多机训练，且本值不为空时，请确保
             不同的机器均可访问当该路径。当 model_save_fn 不为 None 时该值一定不能为空。
@@ -33,6 +32,7 @@ class LoadBestModelCallback(Callback):
             请在函数内完成对模型的加载。
         :param delete_after_train: 在训练结束后是否删掉模型。
         """
+        super().__init__(monitor=monitor, larger_better=larger_better, must_have_monitor=True)
         if model_load_fn is not None:
             assert callable(model_load_fn), "`model_load_fn` must be a callable object."
             assert model_save_fn is not None, "`model_load_fn` and `model_save_fn` must be passed at the same time."
@@ -56,15 +56,11 @@ class LoadBestModelCallback(Callback):
             self.real_save_folder = None
             self.buffer = BytesIO()
 
-        self.monitor = monitor
-        self.larger_better = larger_better
         self.save_folder = save_folder
         self.only_state_dict = only_state_dict
         self.model_save_fn = model_save_fn
         self.model_load_fn = model_load_fn
         self.delete_after_after = delete_after_train
-        self._real_monitor = None
-        self.monitor_value = float('-inf') if larger_better else float('inf')
 
     def on_after_trainer_initialized(self, trainer, driver):
         if self.save_folder is not None and driver.is_distributed() and int(os.environ.get(FASTNLP_BACKEND_LAUNCH, 0))==1:
@@ -76,13 +72,16 @@ class LoadBestModelCallback(Callback):
                 raise RuntimeError(f"Currently {driver.__class__.__name__} does not support using `save_folder` to "
                                    f"save best model when launch using script.")
 
+        super().on_after_trainer_initialized(trainer, driver)
+
+    def on_sanity_check_end(self, trainer, sanity_check_res):
+        self.get_monitor_value(sanity_check_res)
+
     def on_validate_end(self, trainer, results):
-        self._real_monitor, monitor_value = _get_monitor_value(monitor=self.monitor,
-                                                               real_monitor=self._real_monitor,
-                                                               res=results)
-        if (monitor_value < self.monitor_value and self.larger_better is False) or \
-            (monitor_value > self.monitor_value and self.larger_better):
-            self.monitor_value = monitor_value
+        if len(results)==0:
+            return
+        monitor_value = self.get_monitor_value(results)
+        if self.is_better_monitor_value(monitor_value, keep_if_better=True):
             if self.real_save_folder:
                 trainer.save_model(folder=self.real_save_folder, only_state_dict=self.only_state_dict,
                                    model_save_fn=self.model_save_fn)

fastNLP/core/callbacks/progress_callback.py

@@ -8,7 +8,7 @@ __all__ = [
     'RichCallback'
 ]
 
-from .callback import Callback
+from .callback import HasMonitorCallback
 from fastNLP.core.callbacks.utils import _get_monitor_value
 from fastNLP.core.utils import f_rich_progress
 from fastNLP.core.log import logger
@@ -28,15 +28,13 @@ def choose_progress_callback(progress_bar:str):
         return None
 
 
-class ProgressCallback(Callback):
+class ProgressCallback(HasMonitorCallback):
     def on_train_end(self, trainer):
         f_rich_progress.stop()
 
     def on_sanity_check_end(self, trainer, sanity_check_res):
         if len(sanity_check_res) and getattr(self, 'monitor', None) is not None:
-            self._real_monitor, monitor_value = _get_monitor_value(monitor=self.monitor,
-                                                                   real_monitor=self._real_monitor,
-                                                                   res=sanity_check_res)
+            self.get_monitor_value(sanity_check_res)
 
 
 class RichCallback(ProgressCallback):
@@ -46,28 +44,22 @@ class RichCallback(ProgressCallback):
 
         :param print_every: 多少个 batch 更新一次显示。
         :param loss_round_ndigit: 显示的 loss 保留多少位有效数字
-        :param monitor: 当检测到这个key的结果更好时，会打印出不同的颜色进行提示。
+        :param monitor: 当检测到这个key的结果更好时，会打印出不同的颜色进行提示。如果为 None ，会尝试使用 trainer 中设置的 monitor 。
         :param larger_better: 是否是monitor的结果越大越好。
         :param format_json: 是否format json再打印
         """
-        super().__init__()
+        super().__init__(monitor=monitor, larger_better=larger_better, must_have_monitor=False)
         self.print_every = print_every
         self.progress_bar = f_rich_progress
         self.task2id = {}
         self.loss = 0
         self.loss_round_ndigit = loss_round_ndigit
-        self.monitor = monitor
-        self.larger_better = larger_better
-        if larger_better:
-            self.monitor_value = float('-inf')
-        else:
-            self.monitor_value = float('inf')
-        self._real_monitor = monitor
         self.format_json = format_json
 
     def on_after_trainer_initialized(self, trainer, driver):
         if not self.progress_bar.disable:
             self.progress_bar.set_disable(flag=trainer.driver.get_local_rank() != 0)
+        super(RichCallback, self).on_after_trainer_initialized(trainer, driver)
 
     def on_train_begin(self, trainer):
         self.task2id['epoch'] = self.progress_bar.add_task(description='Epoch:0', total=trainer.n_epochs,
@@ -109,16 +101,12 @@ class RichCallback(ProgressCallback):
         text_style = ''
         characters = '-'
         if self.monitor is not None:
-            self._real_monitor, monitor_value = _get_monitor_value(monitor=self.monitor,
-                                                                    real_monitor=self._real_monitor,
-                                                                    res=results)
-            if (self.larger_better and monitor_value > self.monitor_value) or \
-                    (not self.larger_better and monitor_value < self.monitor_value):
+            monitor_value = self.get_monitor_value(results)
+            if self.is_better_monitor_value(monitor_value, keep_if_better=True):
                 if abs(self.monitor_value) != float('inf'):
                     rule_style = 'spring_green3'
                     text_style = '[bold]'
                     characters = '+'
-                self.monitor_value = monitor_value
         self.progress_bar.print()
         self.progress_bar.console.rule(text_style+f"Eval. results on Epoch:{trainer.cur_epoch_idx}, "
                                                   f"Batch:{trainer.batch_idx_in_epoch}",
@@ -151,18 +139,12 @@ class RawTextCallback(ProgressCallback):
         :param larger_better: 是否是monitor的结果越大越好。
         :param format_json: 是否format json再打印
         """
-        super().__init__()
+        super().__init__(monitor=monitor, larger_better=larger_better, must_have_monitor=False)
         self.print_every = print_every
         self.task2id = {}
         self.loss = 0
         self.loss_round_ndigit = loss_round_ndigit
-        self.monitor = monitor
-        self.larger_better = larger_better
-        if larger_better:
-            self.monitor_value = float('-inf')
-        else:
-            self.monitor_value = float('inf')
-        self._real_monitor = monitor
+        self.set_monitor(monitor, larger_better)
         self.format_json = format_json
         self.num_signs = 10
 
@@ -189,14 +171,10 @@ class RawTextCallback(ProgressCallback):
         base_text = f'Eval. results on Epoch:{trainer.cur_epoch_idx}, Batch:{trainer.batch_idx_in_epoch}'
         text = ''
         if self.monitor is not None:
-            self._real_monitor, monitor_value = _get_monitor_value(monitor=self.monitor,
-                                                                   real_monitor=self._real_monitor,
-                                                                   res=results)
-            if (self.larger_better and monitor_value > self.monitor_value) or \
-                    (not self.larger_better and monitor_value < self.monitor_value):
+            monitor_value = self.get_monitor_value(results)
+            if self.is_better_monitor_value(monitor_value, keep_if_better=True):
                 if abs(self.monitor_value) != float('inf'):
                     text = '+'*self.num_signs + base_text + '+'*self.num_signs
-                self.monitor_value = monitor_value
         if len(text) == 0:
             text = '-'*self.num_signs + base_text + '-'*self.num_signs
 

fastNLP/core/callbacks/utils.py

@@ -19,23 +19,31 @@ def _get_monitor_value(monitor: str, real_monitor: Optional[str], res: dict) ->(
     if monitor in res:
         return monitor, res[monitor]
 
+    if real_monitor in res:
+        return real_monitor, res[real_monitor]
+
     pairs = []
     for idx, (key, value) in enumerate(res.items()):
-        match = SequenceMatcher(None, key, monitor).find_longest_match(0, len(key), 0, len(monitor))
-        pairs.append((key, value, match.size, idx))
+        match_size = _match_length(monitor, key)
+        pairs.append((key, value, match_size, idx))
 
     pairs.sort(key=lambda pair: (pair[2], -pair[3]), reverse=True)
     key, value, match_size = pairs[0][:3]
 
-    if real_monitor is not None and real_monitor in res and real_monitor != key:
-        # 如果 real_monitor 比新找的更长就继续用之前的。
-        match = SequenceMatcher(None, real_monitor, monitor).find_longest_match(0, len(real_monitor), 0, len(monitor))
-        if match.size > match_size:
-            return real_monitor, res[real_monitor]
-
-        logger.warning(f"We can not find `{monitor}` in the evaluation result (with keys as {list(res.keys())}), "
-                       f"we use the `{key}` as the monitor.")
-    real_monitor = key
-    return real_monitor, value
+    return key, value
+
+
+def _match_length(a:str, b:str)->int:
+    """
+    需要把长度短的放在前面
+
+    :param a:
+    :param b:
+    :return:
+    """
+    short = a if len(a) < len(b) else b
+    long = a if len(a)>=len(b) else b
+    match = SequenceMatcher(None, short, long).find_longest_match(0, len(short), 0, len(long))
+    return match.size
 
 

fastNLP/core/controllers/trainer.py

@@ -25,6 +25,7 @@ from fastNLP.core.utils import check_fn_not_empty_params, get_fn_arg_names, matc
 from fastNLP.envs import rank_zero_call
 from fastNLP.core.log import logger
 from fastNLP.envs import FASTNLP_MODEL_FILENAME
+from fastNLP.core.utils.exceptions import EarlyStopException
 
 
 class Trainer(TrainerEventTrigger):
@@ -50,6 +51,8 @@ class Trainer(TrainerEventTrigger):
             model_wo_auto_param_call: bool = False,
             accumulation_steps: int = 1,
             fp16: bool = False,
+            monitor: str = None,
+            larger_better: bool = True,
             marker: Optional[str] = None,
             **kwargs
     ):
@@ -106,6 +109,10 @@ class Trainer(TrainerEventTrigger):
          为 False，那么我们会将 batch 直接透传给 forward 函数。注意上述逻辑同样应用于 `train_step`, `validate_step` 和 `test_step`；
         :param accumulation_steps: 梯度累积的步数，表示每隔几个 batch 优化器迭代一次；默认为 1；
         :param fp16: 是否开启混合精度训练；默认为 False；
+        :param monitor: 当存在 validate_dataloaders 时，默认的 monitor metric 的名字。传入的 callback 如果有 monitor 参数且没有
+            在 callback 初始化设定的，将采取这个值。如果在 evaluation 结果中没有找到完全一致的名称，将使用 最短公共字符串算法 找到最匹配
+            的那个作为 monitor 。
+        :param larger_better: monitor 的值是否是越大越好。
         :param marker: 用于标记一个 Trainer 实例，从而在用户调用 `Trainer.on` 函数时，标记该 callback 函数属于哪一个具体的 'trainer' 实例；默认为 None；
         :param kwargs: 一些其它的可能需要的参数；
             torch_non_blocking: 表示用于 pytorch 的 tensor 的 to 方法的参数 non_blocking；
@@ -213,6 +220,8 @@ class Trainer(TrainerEventTrigger):
         self.evaluator = None
         self.epoch_validate = lambda *args, **kwargs: ...
         self.step_validate = lambda *args, **kwargs: ...
+        self.monitor = monitor
+        self.larger_better = larger_better
         if metrics is not None and validate_dataloaders is not None:
             if not callable(validate_every) and (not isinstance(validate_every, int) or validate_every == 0):
                 raise ValueError("Parameter 'validate_every' should be set to 'int' type and either < 0 or > 0.")
@@ -242,6 +251,7 @@ class Trainer(TrainerEventTrigger):
             else:
                 # validate_every > 0
                 self._step_validate_filter = Filter(every=validate_every)
+
         self.metrics = metrics
         self.validate_every = validate_every
 
@@ -323,6 +333,10 @@ class Trainer(TrainerEventTrigger):
                 self.driver.barrier()
             self.on_train_end()
             self.driver.barrier()
+
+        except EarlyStopException as e:
+            logger.info(f"Catch early stop exception: {e.msg}.")
+            self.on_exception(e)
         except KeyboardInterrupt as e:
             self.driver.on_exception()
             self.on_exception(e)

fastNLP/core/metrics/classify_f1_pre_rec_metric.py

@@ -29,14 +29,16 @@ def _compute_f_pre_rec(beta_square, tp, fn, fp):
 
 
 class ClassifyFPreRecMetric(Metric):
-    def __init__(self, backend: Union[str, Backend, None] = 'auto', aggregate_when_get_metric: bool = False,
-                 tag_vocab: Vocabulary = None, encoding_type: str = None, ignore_labels: List[str] = None,
-                 only_gross: bool = True, f_type='micro', beta=1) -> None:
+    def __init__(self, tag_vocab: Vocabulary = None, ignore_labels: List[str] = None, num_class: int = 0,
+                 only_gross: bool = True, f_type='micro', beta=1, backend: Union[str, Backend, None] = 'auto',
+                 aggregate_when_get_metric: bool = False) -> None:
         super(ClassifyFPreRecMetric, self).__init__(backend=backend,
                                                     aggregate_when_get_metric=aggregate_when_get_metric)
         if f_type not in ('micro', 'macro'):
             raise ValueError("f_type only supports `micro` or `macro`', got {}.".format(f_type))
-
+        if tag_vocab:
+            if not isinstance(tag_vocab, Vocabulary):
+                raise TypeError("tag_vocab can only be fastNLP.Vocabulary, not {}.".format(type(tag_vocab)))
         self.ignore_labels = ignore_labels
         self.f_type = f_type
         self.beta = beta
@@ -45,9 +47,32 @@ class ClassifyFPreRecMetric(Metric):
 
         self.tag_vocab = tag_vocab
 
-        self._tp, self._fp, self._fn = defaultdict(partial(self.register_element, aggregate_method='sum')),\
-                                       defaultdict(partial(self.register_element, aggregate_method='sum')),\
-                                       defaultdict(partial(self.register_element, aggregate_method='sum'))
+        self._tp = {}
+        self._fp = {}
+        self._fn = {}
+        if tag_vocab:
+            for word, _ in tag_vocab:
+                word = word.lower()
+                if word != 'o':
+                    word = word[2:]
+                if word in self._true_positives:
+                    continue
+                self._tp[word] = self.register_element(name=f'tp_{word}', aggregate_method='sum',
+                                                       backend=backend)
+                self._fn[word] = self.register_element(name=f'fn_{word}', aggregate_method='sum',
+                                                       backend=backend)
+                self._fp[word] = self.register_element(name=f'fp_{word}', aggregate_method='sum',
+                                                       backend=backend)
+        elif num_class > 0:
+            for word in range(num_class):
+                self._tp[word] = self.register_element(name=f'tp_{word}', aggregate_method='sum',
+                                                       backend=backend)
+                self._fn[word] = self.register_element(name=f'fn_{word}', aggregate_method='sum',
+                                                       backend=backend)
+                self._fp[word] = self.register_element(name=f'fp_{word}', aggregate_method='sum',
+                                                       backend=backend)
+        else:
+            raise ValueError()
 
     def get_metric(self) -> dict:
         r"""
@@ -68,9 +93,11 @@ class ClassifyFPreRecMetric(Metric):
                     tag_name = self.tag_vocab.to_word(tag)
                 else:
                     tag_name = int(tag)
-                tp = self._tp[tag]
-                fn = self._fn[tag]
-                fp = self._fp[tag]
+                tp = self._tp[tag].get_scalar()
+                fn = self._fn[tag].get_scalar()
+                fp = self._fp[tag].get_scalar()
+                if tp == fn == fp == 0:
+                    continue
                 f, pre, rec = _compute_f_pre_rec(self.beta_square, tp, fn, fp)
                 f_sum += f
                 pre_sum += pre
@@ -90,20 +117,29 @@ class ClassifyFPreRecMetric(Metric):
 
         if self.f_type == 'micro':
             f, pre, rec = _compute_f_pre_rec(self.beta_square,
-                                             sum(self._tp.values()),
-                                             sum(self._fn.values()),
-                                             sum(self._fp.values()))
+                                             sum(val.get_scalar() for val in self._tp.values()),
+                                             sum(val.get_scalar() for val in self._fn.values()),
+                                             sum(val.get_scalar() for val in self._fp.values()))
             evaluate_result['f'] = f
             evaluate_result['pre'] = pre
             evaluate_result['rec'] = rec
 
-
         for key, value in evaluate_result.items():
             evaluate_result[key] = round(value, 6)
 
         return evaluate_result
 
     def update(self, pred, target, seq_len=None):
+        r"""
+        evaluate函数将针对一个批次的预测结果做评价指标的累计
+
+        :param torch.Tensor pred: 预测的tensor, tensor的形状可以是torch.Size([B,]), torch.Size([B, n_classes]),
+                torch.Size([B, max_len]), 或者torch.Size([B, max_len, n_classes])
+        :param torch.Tensor target: 真实值的tensor, tensor的形状可以是Element's can be: torch.Size([B,]),
+                torch.Size([B,]), torch.Size([B, max_len]), 或者torch.Size([B, max_len])
+        :param torch.Tensor seq_len: 序列长度标记, 标记的形状可以是None, None, torch.Size([B]), 或者torch.Size([B]).
+                如果mask也被传进来的话seq_len会被忽略.
+        """
         pred = self.tensor2numpy(pred)
         target = self.tensor2numpy(target)
         if seq_len is not None:
@@ -122,14 +158,14 @@ class ClassifyFPreRecMetric(Metric):
                                    f"pred have element numbers: {len(target.flatten())}")
 
             pass
-        elif len(pred.ndim) == len(target.ndim) + 1:
+        elif pred.ndim == target.ndim + 1:
             pred = pred.argmax(axis=-1)
-            if seq_len is None and len(target.ndim) > 1:
+            if seq_len is None and target.ndim > 1:
                 warnings.warn("You are not passing `seq_len` to exclude pad when calculate accuracy.")
         else:
             raise RuntimeError(f"when pred have "
-                               f"size:{pred.ndim}, target should have size: {pred.ndim} or "
-                               f"{pred.ndim[:-1]}, got {target.ndim}.")
+                               f"size:{pred.shape}, target should have size: {pred.shape} or "
+                               f"{pred.shape[:-1]}, got {target.shape}.")
         if masks is not None:
             target = target * masks
             pred = pred * masks
@@ -138,5 +174,3 @@ class ClassifyFPreRecMetric(Metric):
             self._tp[target_idx] += ((pred == target_idx) * (target != target_idx)).sum().item()
             self._fp[target_idx] += ((pred == target_idx) * (target == target_idx)).sum().item()
             self._fn[target_idx] += ((pred != target_idx) * (target != target_idx)).sum().item()
-
-

fastNLP/core/utils/exceptions.py

@@ -0,0 +1,10 @@
+
+class EarlyStopException(BaseException):
+    r"""
+    用于EarlyStop时从Trainer训练循环中跳出。
+
+    """
+
+    def __init__(self, msg):
+        super(EarlyStopException, self).__init__(msg)
+        self.msg = msg

tests/core/callbacks/test_utils.py

@@ -12,32 +12,27 @@ def test_get_monitor_value():
     with Capturing() as output:
         monitor, value = _get_monitor_value(monitor='f1', real_monitor=None, res=res)
     assert monitor == 'f1' and value==0.2
-    assert 'We can not find' not in output[0]
 
     # 测试可以匹配，且选择更靠前的
     res = {'acc#f1': 0.2, 'acc#rec': 0.3, 'add#f':0.4}
     with Capturing() as output:
         monitor, value = _get_monitor_value(monitor='f1', real_monitor=None, res=res)
     assert monitor=='acc#f1' and value==0.2
-    assert 'We can not find' in output[0]
 
     # 测试monitor匹配不上，使用real_monitor
     res = {'acc#f1': 0.2, 'acc#rec': 0.3, 'add#f':0.4}
     with Capturing() as output:
-        monitor, value = _get_monitor_value(monitor='acc#f', real_monitor='acc#rec', res=res)
+        monitor, value = _get_monitor_value(monitor='acc', real_monitor='acc#rec', res=res)
     assert monitor=='acc#rec' and value==0.3
-    assert 'We can not find' not in output[0]
 
     # 测试monitor/real_monitor匹配不上, 重新选择
     res = {'acc#f1': 0.2, 'acc#rec': 0.3, 'add#f':0.4}
     with Capturing() as output:
         monitor, value = _get_monitor_value(monitor='acc#f', real_monitor='acc#r', res=res)
     assert monitor=='acc#f1' and value==0.2
-    assert 'We can not find' in output[0]
 
     # 测试partial的位置
     res = {"acc#acc": 0.52, "loss#loss": 2}
     with Capturing() as output:
         monitor, value = _get_monitor_value(monitor='-loss', real_monitor=None, res=res)
     assert monitor=='loss#loss' and value==2
-    assert 'We can not find' in output[0]

tests/core/metrics/test_accuracy_torch.py

@@ -15,6 +15,7 @@ from sklearn.metrics import accuracy_score as sklearn_accuracy
 from fastNLP.core.dataset import DataSet
 from fastNLP.core.metrics.accuracy import Accuracy
 from fastNLP.core.metrics.metric import Metric
+from .utils import find_free_network_port, setup_ddp, _assert_allclose
 
 set_start_method("spawn", force=True)
 
@@ -23,42 +24,6 @@ NUM_PROCESSES = 2
 pool = None
 
 
-def setup_ddp(rank: int, world_size: int, master_port: int) -> None:
-    """Setup ddp environment."""
-
-    os.environ["MASTER_ADDR"] = "localhost"
-    os.environ["MASTER_PORT"] = str(master_port)
-    print(torch.cuda.device_count())
-    if torch.distributed.is_available() and sys.platform not in ("win32", "cygwin"):
-        torch.distributed.init_process_group("gloo", rank=rank, world_size=world_size)
-
-
-def find_free_network_port() -> int:
-    """Finds a free port on localhost.
-
-    It is useful in single-node training when we don't want to connect to a real master node but have to set the
-    `MASTER_PORT` environment variable.
-    """
-    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-    s.bind(("", 0))
-    s.listen(1)
-    port = s.getsockname()[1]
-    s.close()
-    return port
-
-
-def _assert_allclose(my_result: Union[float, np.ndarray], sklearn_result: Union[float, np.ndarray],
-                     atol: float = 1e-8) -> None:
-    """
-    测试对比结果，这里不用非得是必须数组且维度对应，一些其他情况例如 np.allclose(np.array([[1e10, ], ]), 1e10+1) 也是 True
-    :param my_result: 可以不限设备等
-    :param sklearn_result:
-    :param atol:
-    :return:
-    """
-    assert np.allclose(a=my_result, b=sklearn_result, atol=atol)
-
-
 def _test(local_rank: int,
           world_size: int,
           device: torch.device,

tests/core/metrics/test_classify_f1_pre_rec_metric_torch.py

@@ -0,0 +1,177 @@
+from functools import partial
+import copy
+
+import pytest
+import torch
+import numpy as np
+from torch.multiprocessing import Pool, set_start_method
+
+from fastNLP.core.metrics import ClassifyFPreRecMetric
+from fastNLP.core.dataset import DataSet
+from .utils import find_free_network_port, setup_ddp
+
+set_start_method("spawn", force=True)
+
+
+def _test(local_rank: int, world_size: int, device: torch.device,
+          dataset: DataSet, metric_class, metric_kwargs, metric_result):
+    metric = metric_class(**metric_kwargs)
+    # dataset 也类似（每个进程有自己的一个）
+    dataset = copy.deepcopy(dataset)
+    metric.to(device)
+    # 把数据拆到每个 GPU 上，有点模仿 DistributedSampler 的感觉，但这里数据单位是一个 batch（即每个 i 取了一个 batch 到自己的 GPU 上）
+    for i in range(local_rank, len(dataset), world_size):
+        pred, tg = dataset[i]['pred'].to(device), dataset[i]['tg'].to(device)
+        metric.update(pred, tg)
+
+    my_result = metric.get_metric()
+    for keys in ['f', 'pre', 'rec']:
+        np.allclose(my_result[keys], metric_result[keys], atol=0.000001)
+
+
+class TestClassfiyFPreRecMetric:
+    def test_case_1(self):
+        pred = torch.tensor([[-0.4375, -0.1779, -1.0985, -1.1592, 0.4910],
+                             [1.3410, 0.2889, -0.8667, -1.8580, 0.3029],
+                             [0.7459, -1.1957, 0.3231, 0.0308, -0.1847],
+                             [1.1439, -0.0057, 0.8203, 0.0312, -1.0051],
+                             [-0.4870, 0.3215, -0.8290, 0.9221, 0.4683],
+                             [0.9078, 1.0674, -0.5629, 0.3895, 0.8917],
+                             [-0.7743, -0.4041, -0.9026, 0.2112, 1.0892],
+                             [1.8232, -1.4188, -2.5615, -2.4187, 0.5907],
+                             [-1.0592, 0.4164, -0.1192, 1.4238, -0.9258],
+                             [-1.1137, 0.5773, 2.5778, 0.5398, -0.3323],
+                             [-0.3868, -0.5165, 0.2286, -1.3876, 0.5561],
+                             [-0.3304, 1.3619, -1.5744, 0.4902, -0.7661],
+                             [1.8387, 0.5234, 0.4269, 1.3748, -1.2793],
+                             [0.6692, 0.2571, 1.2425, -0.5894, -0.0184],
+                             [0.4165, 0.4084, -0.1280, 1.4489, -2.3058],
+                             [-0.5826, -0.5469, 1.5898, -0.2786, -0.9882],
+                             [-1.5548, -2.2891, 0.2983, -1.2145, -0.1947],
+                             [-0.7222, 2.3543, -0.5801, -0.0640, -1.5614],
+                             [-1.4978, 1.9297, -1.3652, -0.2358, 2.5566],
+                             [0.1561, -0.0316, 0.9331, 1.0363, 2.3949],
+                             [0.2650, -0.8459, 1.3221, 0.1321, -1.1900],
+                             [0.0664, -1.2353, -0.5242, -1.4491, 1.3300],
+                             [-0.2744, 0.0941, 0.7157, 0.1404, 1.2046],
+                             [0.9341, -0.6652, 1.4512, 0.9608, -0.3623],
+                             [-1.1641, 0.0873, 0.1163, -0.2068, -0.7002],
+                             [1.4775, -2.0025, -0.5634, -0.1589, 0.0247],
+                             [1.0151, 1.0304, -0.1042, -0.6955, -0.0629],
+                             [-0.3119, -0.4558, 0.7757, 0.0758, -1.6297],
+                             [1.0654, 0.0313, -0.7716, 0.1194, 0.6913],
+                             [-0.8088, -0.6648, -0.5018, -0.0230, -0.8207],
+                             [-0.7753, -0.3508, 1.6163, 0.7158, 1.5207],
+                             [0.8692, 0.7718, -0.6734, 0.6515, 0.0641]])
+        arg_max_pred = torch.argmax(pred, dim=-1)
+        target = torch.tensor([0, 2, 4, 1, 4, 0, 1, 3, 3, 3, 1, 3, 4, 4, 3, 4, 0, 2, 4, 4, 3, 4, 4, 3,
+                               0, 3, 0, 0, 0, 1, 3, 1])
+
+        metric = ClassifyFPreRecMetric(f_type='macro', num_class=5)
+        metric.update(pred, target)
+        result_dict = metric.get_metric()
+        f1_score = 0.1882051282051282
+        recall = 0.1619047619047619
+        pre = 0.23928571428571427
+
+        ground_truth = {'f': f1_score, 'pre': pre, 'rec': recall}
+        for keys in ['f', 'pre', 'rec']:
+            np.allclose(result_dict[keys], ground_truth[keys], atol=0.000001)
+
+        metric = ClassifyFPreRecMetric(f_type='micro', num_class=5)
+        metric.update(pred, target)
+        result_dict = metric.get_metric()
+        f1_score = 0.21875
+        recall = 0.21875
+        pre = 0.21875
+
+        ground_truth = {'f': f1_score, 'pre': pre, 'rec': recall}
+        for keys in ['f', 'pre', 'rec']:
+            np.allclose(result_dict[keys], ground_truth[keys], atol=0.000001)
+
+        metric = ClassifyFPreRecMetric(only_gross=False, f_type='macro', num_class=5)
+        metric.update(pred, target)
+        result_dict = metric.get_metric()
+        ground_truth = {
+            '0': {'f1-score': 0.13333333333333333, 'precision': 0.125, 'recall': 0.14285714285714285, 'support': 7},
+            '1': {'f1-score': 0.0, 'precision': 0.0, 'recall': 0.0, 'support': 5},
+            '2': {'f1-score': 0.0, 'precision': 0.0, 'recall': 0.0, 'support': 2},
+            '3': {'f1-score': 0.30769230769230765, 'precision': 0.5, 'recall': 0.2222222222222222, 'support': 9},
+            '4': {'f1-score': 0.5, 'precision': 0.5714285714285714, 'recall': 0.4444444444444444, 'support': 9},
+            'macro avg': {'f1-score': 0.1882051282051282, 'precision': 0.23928571428571427,
+                          'recall': 0.1619047619047619, 'support': 32},
+            'micro avg': {'f1-score': 0.21875, 'precision': 0.21875, 'recall': 0.21875, 'support': 32},
+            'weighted avg': {'f1-score': 0.2563301282051282, 'precision': 0.3286830357142857, 'recall': 0.21875,
+                             'support': 32}}
+        for keys in result_dict.keys():
+            if keys == "f" or "pre" or "rec":
+                continue
+            gl = str(keys[-1])
+            tmp_d = {"p": "precision", "r": "recall", "f": "f1-score"}
+            gk = tmp_d[keys[0]]
+            np.allclose(result_dict[keys], ground_truth[gl][gk], atol=0.000001)
+
+    @pytest.mark.parametrize("f_type, f1_score,recall,pre",
+                             [('macro', 0.1882051282051282, 0.1619047619047619, 0.23928571428571427),
+                              ('micro', 0.21875, 0.21875, 0.21875)])
+    def test_case_2(self, f_type, f1_score, recall, pre):
+        dataset = DataSet({
+            'pred': [torch.tensor([[-0.4375, -0.1779, -1.0985, -1.1592, 0.4910],
+                                   [1.3410, 0.2889, -0.8667, -1.8580, 0.3029],
+                                   [0.7459, -1.1957, 0.3231, 0.0308, -0.1847],
+                                   [1.1439, -0.0057, 0.8203, 0.0312, -1.0051],
+                                   [-0.4870, 0.3215, -0.8290, 0.9221, 0.4683],
+                                   [0.9078, 1.0674, -0.5629, 0.3895, 0.8917],
+                                   [-0.7743, -0.4041, -0.9026, 0.2112, 1.0892],
+                                   [1.8232, -1.4188, -2.5615, -2.4187, 0.5907],
+                                   [-1.0592, 0.4164, -0.1192, 1.4238, -0.9258],
+                                   [-1.1137, 0.5773, 2.5778, 0.5398, -0.3323],
+                                   [-0.3868, -0.5165, 0.2286, -1.3876, 0.5561],
+                                   [-0.3304, 1.3619, -1.5744, 0.4902, -0.7661],
+                                   [1.8387, 0.5234, 0.4269, 1.3748, -1.2793],
+                                   [0.6692, 0.2571, 1.2425, -0.5894, -0.0184],
+                                   [0.4165, 0.4084, -0.1280, 1.4489, -2.3058],
+                                   [-0.5826, -0.5469, 1.5898, -0.2786, -0.9882]]),
+                     torch.tensor([
+                         [-1.5548, -2.2891, 0.2983, -1.2145, -0.1947],
+                         [-0.7222, 2.3543, -0.5801, -0.0640, -1.5614],
+                         [-1.4978, 1.9297, -1.3652, -0.2358, 2.5566],
+                         [0.1561, -0.0316, 0.9331, 1.0363, 2.3949],
+                         [0.2650, -0.8459, 1.3221, 0.1321, -1.1900],
+                         [0.0664, -1.2353, -0.5242, -1.4491, 1.3300],
+                         [-0.2744, 0.0941, 0.7157, 0.1404, 1.2046],
+                         [0.9341, -0.6652, 1.4512, 0.9608, -0.3623],
+                         [-1.1641, 0.0873, 0.1163, -0.2068, -0.7002],
+                         [1.4775, -2.0025, -0.5634, -0.1589, 0.0247],
+                         [1.0151, 1.0304, -0.1042, -0.6955, -0.0629],
+                         [-0.3119, -0.4558, 0.7757, 0.0758, -1.6297],
+                         [1.0654, 0.0313, -0.7716, 0.1194, 0.6913],
+                         [-0.8088, -0.6648, -0.5018, -0.0230, -0.8207],
+                         [-0.7753, -0.3508, 1.6163, 0.7158, 1.5207],
+                         [0.8692, 0.7718, -0.6734, 0.6515, 0.0641]
+                     ])],
+            'tg': [
+                torch.LongTensor([0, 2, 4, 1, 4, 0, 1, 3, 3, 3, 1, 3, 4, 4, 3, 4]),
+                torch.LongTensor([0, 2, 4, 4, 3, 4, 4, 3, 0, 3, 0, 0, 0, 1, 3, 1])
+            ]
+        })
+        metric_kwargs = {
+            'f_type': f_type,
+            'num_class': 5,
+            'only_gross': False,
+            'aggregate_when_get_metric': True
+        }
+        ground_truth = {'f': f1_score, 'pre': pre, 'rec': recall}
+
+        NUM_PROCESSES = 2
+        pool = Pool(processes=NUM_PROCESSES)
+        master_port = find_free_network_port()
+        pool.starmap(setup_ddp, [(rank, NUM_PROCESSES, master_port) for rank in range(NUM_PROCESSES)])
+
+        pool.starmap(partial(_test, dataset=dataset,
+                             metric_class=ClassifyFPreRecMetric,
+                             metric_kwargs=metric_kwargs,
+                             metric_result=ground_truth),
+                     [(rank, NUM_PROCESSES, torch.device(f'cuda:{rank+4}')) for rank in range(NUM_PROCESSES)])
+        pool.close()
+        pool.join()

tests/core/metrics/test_span_f1_rec_acc_torch.py

@@ -14,6 +14,7 @@ from torch.multiprocessing import Pool, set_start_method
 from fastNLP.core.vocabulary import Vocabulary
 from fastNLP.core.metrics import SpanFPreRecMetric
 from fastNLP.core.dataset import DataSet
+from .utils import find_free_network_port, setup_ddp
 
 set_start_method("spawn", force=True)
 
@@ -41,40 +42,6 @@ NUM_PROCESSES = 2
 pool = None
 
 
-def setup_ddp(rank: int, world_size: int, master_port: int) -> None:
-    """Setup ddp environment."""
-
-    os.environ["MASTER_ADDR"] = "localhost"
-    os.environ["MASTER_PORT"] = str(master_port)
-    if torch.distributed.is_available() and sys.platform not in ("win32", "cygwin"):
-        torch.distributed.init_process_group("gloo", rank=rank, world_size=world_size)
-
-
-def find_free_network_port() -> int:
-    """Finds a free port on localhost.
-
-    It is useful in single-node training when we don't want to connect to a real master node but have to set the
-    `MASTER_PORT` environment variable.
-    """
-    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-    s.bind(("", 0))
-    s.listen(1)
-    port = s.getsockname()[1]
-    s.close()
-    return port
-
-
-# @pytest.fixture(scope='class', autouse=True)
-# def pre_process():
-#     global pool
-#     pool = Pool(processes=NUM_PROCESSES)
-#     master_port = find_free_network_port()
-#     pool.starmap(setup_ddp, [(rank, NUM_PROCESSES, master_port) for rank in range(NUM_PROCESSES)])
-#     yield
-#     pool.close()
-#     pool.join()
-
-
 def _test(local_rank: int,
           world_size: int,
           device: torch.device,

tests/core/metrics/utils.py

@@ -0,0 +1,42 @@
+import os, sys
+import socket
+from typing import Union
+
+import torch
+from torch import distributed
+import numpy as np
+
+
+def setup_ddp(rank: int, world_size: int, master_port: int) -> None:
+    """Setup ddp environment."""
+
+    os.environ["MASTER_ADDR"] = "localhost"
+    os.environ["MASTER_PORT"] = str(master_port)
+    if torch.distributed.is_available() and sys.platform not in ("win32", "cygwin"):
+        torch.distributed.init_process_group("gloo", rank=rank, world_size=world_size)
+
+
+def find_free_network_port() -> int:
+    """Finds a free port on localhost.
+
+    It is useful in single-node training when we don't want to connect to a real master node but have to set the
+    `MASTER_PORT` environment variable.
+    """
+    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    s.bind(("", 0))
+    s.listen(1)
+    port = s.getsockname()[1]
+    s.close()
+    return port
+
+
+def _assert_allclose(my_result: Union[float, np.ndarray], sklearn_result: Union[float, np.ndarray],
+                     atol: float = 1e-8) -> None:
+    """
+    测试对比结果，这里不用非得是必须数组且维度对应，一些其他情况例如 np.allclose(np.array([[1e10, ], ]), 1e10+1) 也是 True
+    :param my_result: 可以不限设备等
+    :param sklearn_result:
+    :param atol:
+    :return:
+    """
+    assert np.allclose(a=my_result, b=sklearn_result, atol=atol)