Python字符串 lstrip() 方法

Python String lstrip()方法返回删除了前导字符的字符串副本（基于传递的字符串参数）。如果没有传递参数，它会删除前导空格。

Syntax: 

string.lstrip(characters)

Parameters: 

• characters [optional]: A set of characters to remove as leading characters.

Returns: 

Returns a copy of the string with leading characters stripped.

示例 1

Python3

# Python3 program to demonstrate the use of  
# lstrip() method using default parameter
    
# string which is to be stripped 
string = "   geeksforgeeks"
    
# Removes spaces from left. 
print(string.lstrip())

输出：

geeksforgeeks

示例 2

Python3

# Python3 program to demonstrate the use of  
# lstrip() method using optional parameters
    
# string which is to be stripped 
string = "++++x...y!!z* geeksforgeeks"
  
# Removes given set of characters from left. 
print(string.lstrip("+.!*xyz"))

输出：  

geeksforgeeks

示例 3

Python3

# string which is to be stripped 
string = "geeks for geeks"
  
# Argument doesn't contain leading 'g' 
# So, no characters are removed 
print(string.lstrip('ge'))

输出：  

ks for geeks

示例4

当我们尝试剥离除字符串之外的任何内容时会出现运行时错误。

Python3

# Python3 program to demonstrate the use of 
# strip() method error 
  
string = " geeks for geeks "
list =[1, 2, 3] 
  
# prints the error message 
print(list.lstrip())

输出：

print(list.lstrip()) 
AttributeError: 'list' object has no attribute 'lstrip'