Created by: Yancey1989

	Traceback (most recent call last):
[17:06:10]	File "test_cos_sim_op.py", line 29, in setUp
[17:06:10]	self.op = create_op("cos_sim")
[17:06:10]	File "/paddle/python/paddle/v2/framework/tests/gradient_checker.py", line 14, in create_op
[17:06:10]	for in_name, _ in Operator.get_op_input_names(op_type):
[17:06:10]	ValueError: need more than 1 value to unpack
[17:06:10]