Python---基础----数据类型的内置函数

2019-05-24

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# isalpha() 检测字符串是否是字母组成  返回布尔值
s = ‘I 狗like dog‘
s1 = ‘I狗likedog‘
print(s.isalpha())
print(s1.isalpha())

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# isalnum() 检测字符串是否有字母加数字组成   返回布尔值
s = ‘I 狗li414ke dog‘
s1 = ‘I狗likedog132132‘
s2 = ‘3133‘
print(s.isalnum())
print(s1.isalnum())
print(s2.isalnum())

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# isdigit()  检测字符串是否由整数组成
# isdecimal()
# isnumeric()
s = ‘123‘
print(s.isdigit())
print(s.isdecimal())
print(s.isnumeric())
print(‘=‘*20)
s = b‘101100‘
print(s.isdigit())
#print(s.isdecimal())
#print(s.isnumeric())
print(‘=‘*20)

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原文地址：https://www.cnblogs.com/niaocaizhou/p/10917193.html