python 判断字符串是否为数字,python怎样判断字符串是否是数字
复制自:https://www。金淑。com/p/09d 94 BC A8 e 54
在实际写程序中,经常要对变量类型进行判断,除了用类型(变量)这种方法外,还可以用isinstance方法判断:
a=[1,2]if list in str(type(a)):print( 1 )else:print( 2 )a=1b=[1,2,3,4]c={ a :1, b:2, c:3}e=abcif isinstance(a,int):print a is int else:print a is not int if is is is is is is is is instance(b,list):print b is list else:print b is list if is is is is is is is
作者:阿拉鸡
链接:https://www。金淑。com/p/09d 94 BC A8 e 54
来源:简书
著作权归作者所有。商业转载请联系作者获得授权,非商业转载请注明出处。
在实际写程序中,经常要对变量类型进行判断,除了用类型(变量)这种方法外,还可以用isinstance方法判断:
a=[1,2]if list in str(type(a)):print( 1 )else:print( 2 )a=1b=[1,2,3,4]c={ a :1, b:2, c:3}e=abcif isinstance(a,int):print a is int else:print a is not int if is is is is is is is is instance(b,list):print b is list else:print b is list if is is is is is is is
作者:阿拉鸡
链接:https://www。金淑。com/p/09d 94 BC A8 e 54
来源:简书
著作权归作者所有。商业转载请联系作者获得授权,非商业转载请注明出处。
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