How to use 'how to take 2d array input in python' in Python

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83def shape2d(a):
84 """
85 a: a int or tuple/list of length 2
86 """
87 if type(a) == int:
88 return [a, a]
89 if isinstance(a, (list, tuple)):
90 assert len(a) == 2
91 return list(a)
92 raise RuntimeError("Illegal shape: {}".format(a))

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