!6527 modify bud of memory error is thrown

Merge pull request !6527 from lilei/modify_bug

mindspore/common/initializer.py

@@ -15,6 +15,7 @@
 """Initializer for cell parameters."""
 import numbers
 import math
+import copy
 
 from functools import reduce
 import numpy as np
@@ -82,7 +83,7 @@ class Initializer:
             shape = self.shape
 
         try:
-            arr = np.ndarray(shape)
+            arr = np.ndarray(shape, dtype=mstype.dtype_to_nptype(self.dtype))
         except ValueError:
             msg = "Error shape={}".format(shape)
             logger.error(msg)
@@ -478,9 +479,10 @@ def initializer(init, shape=None, dtype=mstype.float32):
             raise ValueError(f"shape is invalid, shape value must be positive integer, shape:{shape}")
 
     if isinstance(init, Initializer):
-        init.shape = init.shape if init.shape is not None else shape
-        init.dtype = init.dtype if init.dtype is not None else dtype
-        return init
+        init_copy = copy.deepcopy(init)
+        init_copy.shape = shape if shape is not None else init.shape
+        init_copy.dtype = init.dtype if init.dtype is not None else dtype
+        return init_copy
 
     if isinstance(init, str):
         init_obj = _INITIALIZER_ALIAS[init.lower()]()