python判断一个字符串是否为数字，判断字符串中是否包含数字python

copy from :?https://www.jianshu.com/p/09d94bca8e54

在实际写程序中，经常要对变量类型进行判断，除了用type(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 = (1,2,3,4)d = {‘a‘:1,‘b‘:2,‘c‘:3}e = "abc"if isinstance(a,int): print "a is int"else: print "a is not int"if isinstance(b,list): print "b is list"else: print "b is not list"if isinstance(c,tuple): print "c is tuple"else: print "c is not tuple"if isinstance(d,dict): print "d is dict"else: print "d is not dict"if isinstance(e,str): print "d is str"else: print "d is not str"

作者：阿拉鸡
链接：https://www.jianshu.com/p/09d94bca8e54
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type(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 = (1,2,3,4)d = {‘a‘:1,‘b‘:2,‘c‘:3}e = "abc"if isinstance(a,int): print "a is int"else: print "a is not int"if isinstance(b,list): print "b is list"else: print "b is not list"if isinstance(c,tuple): print "c is tuple"else: print "c is not tuple"if isinstance(d,dict): print "d is dict"else: print "d is not dict"if isinstance(e,str): print "d is str"else: print "d is not str"

作者：阿拉鸡
链接：https://www.jianshu.com/p/09d94bca8e54
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。