单项选择题

下面代码的输出结果是‪‪‪‪‪‪‫‪‪‪‪‪‫‪‪‪‪‪‫‪‪‪‪‪‫‪‪‪‪‪‪‫‪a = {}if isinstance(a,list): print("{} is list".format(a))else: print("{} is {}".format("a",type(a)))
A a is list
B 出错
C 无输出
D a is

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