Python学习笔记：isalnum()函数的用法

Python学习笔记：isalnum()函数的用法

isalnum()函数：检测字符串是否由字母和数字组成，若字符串由数字和字母组成则返回true，否则返回false

str1 = 'python'
print(str1.isalnum())   # True

str2 = 'python学习'
print(str2.isalnum())   # true

str3 = '123'
print(str3.isalnum())   # true

str4 = 'Python123'
print(str4.isalnum())   # true

str5 = 'python 123'
print(str5.isalnum())   # 有空格所以返回false