Python String isalnum() 方法

Python String isalnum()方法检查给定字符串中的所有字符是否都是字母数字。字母数字表示字母或数字的字符。

Syntax: 

string_name.isalnum() 

Parameter: 

isalnum() method takes no parameters 

Return: 

• True: If all the characters are alphanumeric 
• False: If one or more characters are not alphanumeric 

示例 1：isalnum() 的工作

Python

# Python program to demonstrate the use of
# isalnum() method  
  
# here a,b and c are characters and 1,2 and 3
# are numbers
string = "abc123"
print(string.isalnum())
  
# here a,b and c are characters and 1,2 and 3 
# are numbers but space is not a alphanumeric 
# character
string = "abc 123" 
print(string.isalnum())

输出：

True
False