Python String isidentifier() 方法

Python String isidentifier()方法用于检查字符串是否为有效标识符。如果字符串是有效标识符，则该方法返回 True，否则返回 False。

Syntax: 

string.isidentifier()

Parameters:

The method does not take any parameters

Return Value: 

The method can return one of the two values: 

• True: When the string is a valid identifier.
• False: When the string is not a valid identifier.

示例：isidentifier() 如何工作

Python3

# Python code to illustrate 
# the working of isidentifier()
  
# String with spaces
string = "Geeks for Geeks"
print(string.isidentifier())
  
# A Perfect identifier
string = "GeeksforGeeks"
print(string.isidentifier())
  
# Empty string
string = ""
print(string.isidentifier())
  
# Alphanumerical string
string = "Geeks0for0Geeks"
print(string.isidentifier())
  
# Beginning with an integer
string = "54Geeks0for0Geeks"
print(string.isidentifier())

输出：

False
True
False
True
False