code: def testAssignNoShape(self):
      with self.cached_session():
          value = self._NewShapelessTensor()
          var = state_ops.variable_op(
              [1, 2], dtypes.float32, set_shape=False
          )
          self.assertEqual(
              tensor_shape.unknown_shape(), var.get_shape()
          )
          self.assertEqual(
              tensor_shape.unknown_shape(),
              state_ops.assign(var, value).get_shape(),
          )
  
imports: import numpy
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor_shape
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import array_ops_stack
  from tensorflow.python.ops import gen_state_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import state_ops
  from tensorflow.python.ops import variable_v1
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import test
label_desc: Use image node_id 12 for calling the VariableOpTest obj's underlying member method code with example usage: obj.testAssignNoShape() without return types