python 学习---isinstance() arg 2 must be a type or tuple of types
2017-05-04 11:16
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当使用循环迭代列表时，有时需要判断列表中的内容。
如：L=['HELLO','WENNY',22,'YANXI']
[s.lower() for s in L if isinstance(s,str)==true]
提示错误：isinstance() arg 2 must be a type or tuple of types
这时可以exit()退出python，然后再重新进入python
如：L=['HELLO','WENNY',22,'YANXI']
[s.lower() for s in L if isinstance(s,str)==true]
提示错误：isinstance() arg 2 must be a type or tuple of types
这时可以exit()退出python，然后再重新进入python
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