!15553 modify checkout file name bug

From: @changzherui
Reviewed-by: @kingxian,@zhoufeng54
Signed-off-by: @kingxian

mindspore/_checkparam.py

@@ -443,12 +443,17 @@ class Validator:
     @staticmethod
     def check_file_name_by_regular(target, reg=None, flag=re.ASCII, prim_name=None):
         """Check whether file name is legitimate."""
+        if not isinstance(target, str):
+            raise ValueError("Args file_name {} must be string, please check it".format(target))
+        if target.endswith("\\") or target.endswith("/"):
+            raise ValueError("File name cannot be a directory path.")
         if reg is None:
             reg = r"^[0-9a-zA-Z\_\-\.\:\/\\]+$"
         if re.match(reg, target, flag) is None:
             prim_name = f'in `{prim_name}`' if prim_name else ""
             raise ValueError("'{}' {} is illegal, it should be match regular'{}' by flags'{}'".format(
                 target, prim_name, reg, flag))
+
         return True
 
     @staticmethod

mindspore/train/callback/_checkpoint.py

@@ -26,6 +26,7 @@ from mindspore._checkparam import Validator
 from mindspore.train._utils import _make_directory
 from mindspore.train.serialization import save_checkpoint, _save_graph
 from mindspore.parallel._ps_context import _is_role_pserver, _get_ps_mode_rank
+from mindspore.parallel._cell_wrapper import destroy_allgather_cell
 from ._callback import Callback, set_cur_net
 from ...common.tensor import Tensor
 
@@ -33,17 +34,6 @@ _cur_dir = os.getcwd()
 _save_dir = _cur_dir
 
 
-def _check_file_name_prefix(file_name_prefix):
-    """
-    Check file name valid or not.
-
-    File name can't include '/'. This file name naming convention only apply to Linux.
-    """
-    if not isinstance(file_name_prefix, str) or file_name_prefix.find('/') >= 0:
-        return False
-    return True
-
-
 def _chg_ckpt_file_name_if_same_exist(directory, prefix):
     """Check if there is a file with the same name."""
     files = os.listdir(directory)
@@ -245,11 +235,8 @@ class ModelCheckpoint(Callback):
         self._last_time_for_keep = time.time()
         self._last_triggered_step = 0
 
-        if _check_file_name_prefix(prefix):
-            self._prefix = prefix
-        else:
-            raise ValueError("Prefix {} for checkpoint file name invalid, "
-                             "please check and correct it and then continue.".format(prefix))
+        Validator.check_file_name_by_regular(prefix)
+        self._prefix = prefix
 
         if directory is not None:
             self._directory = _make_directory(directory)
@@ -310,7 +297,6 @@ class ModelCheckpoint(Callback):
             if thread.getName() == "asyn_save_ckpt":
                 thread.join()
 
-        from mindspore.parallel._cell_wrapper import destroy_allgather_cell
         destroy_allgather_cell()
 
     def _check_save_ckpt(self, cb_params, force_to_save):

tests/ut/python/utils/test_callback.py

@@ -28,7 +28,8 @@ from mindspore.nn import TrainOneStepCell, WithLossCell
 from mindspore.nn.optim import Momentum
 from mindspore.train.callback import ModelCheckpoint, RunContext, LossMonitor, _InternalCallbackParam, \
     _CallbackManager, Callback, CheckpointConfig, _set_cur_net, _checkpoint_cb_for_save_op
-from mindspore.train.callback._checkpoint import _check_file_name_prefix, _chg_ckpt_file_name_if_same_exist
+from mindspore.train.callback._checkpoint import _chg_ckpt_file_name_if_same_exist
+
 
 class Net(nn.Cell):
     """Net definition."""
@@ -150,32 +151,6 @@ def test_loss_monitor_normal_mode():
     loss_cb.end(run_context)
 
 
-def test_check_file_name_not_str():
-    """Test check file name not str."""
-    ret = _check_file_name_prefix(1)
-    assert not ret
-
-
-def test_check_file_name_back_err():
-    """Test check file name back err."""
-    ret = _check_file_name_prefix('abc.')
-    assert ret
-
-
-def test_check_file_name_one_alpha():
-    """Test check file name one alpha."""
-    ret = _check_file_name_prefix('a')
-    assert ret
-    ret = _check_file_name_prefix('_')
-    assert ret
-
-
-def test_check_file_name_err():
-    """Test check file name err."""
-    ret = _check_file_name_prefix('_123')
-    assert ret
-
-
 def test_chg_ckpt_file_name_if_same_exist():
     """Test chg ckpt file name if same exist."""
     _chg_ckpt_file_name_if_same_exist(directory="./test_files", prefix="ckpt")