pylint clean

tests/ut/python/exec/test_AssignAdd.py

@@ -45,7 +45,6 @@ class Net(nn.Cell):
 @non_graph_engine
 def test_AssignAdd_1():
     """test AssignAdd 1"""
-    import mindspore.context as context
     context.set_context(mode=context.GRAPH_MODE)
     net = Net()
     x = Tensor(np.ones([1]).astype(np.int64) * 100)
@@ -65,7 +64,6 @@ def test_AssignAdd_1():
 @non_graph_engine
 def test_AssignAdd_2():
     """test AssignAdd 2"""
-    import mindspore.context as context
     context.set_context(mode=context.GRAPH_MODE)
     net = Net()
     x = Tensor(np.ones([1]).astype(np.int64) * 102)

tests/ut/python/ir/test_dtype.py

@@ -13,9 +13,9 @@
 # limitations under the License.
 # ============================================================================
 """test_dtype"""
+from dataclasses import dataclass
 import numpy as np
 import pytest
-from dataclasses import dataclass
 
 import mindspore as ms
 from mindspore.common import dtype