Python字符串|条（）

strip()是Python编程语言中的一个内置函数，它返回删除了前导和尾随字符的字符串副本（基于传递的字符串参数）。
句法：

string.strip([chars])
Parameter: 
There is only one optional parameter in it:
1)chars - a string specifying 
the set of characters to be removed. 

If the optional chars parameter is not given, all leading 
and trailing whitespaces are removed from the string.
Return Value:
Returns a copy of the string with both leading and trailing characters removed.

Python3

# Python3 program to demonstrate the use of
# strip() method 
 
string = """    geeks for geeks    """
 
# prints the string without stripping
print(string)
 
# prints the string by removing leading and trailing whitespaces
print(string.strip())  
 
# prints the string by removing geeks
print(string.strip(' geeks'))

输出：

geeks for geeks     
geeks for geeks
for

Python3

# Python Program to demonstrate use of strip() method
 
str1 = 'geeks for geeks'
# Print the string without stripping.
print(str1)
 
# String whose set of characters are to be
# remove from original string at both its ends.
str2 = 'ekgs'
 
# Print string after stripping str2 from str1 at both its end.
print(str1.strip(str2))

输出：

geeks for geeks
 for

上述代码的工作：
我们首先构造一个字符串str1 = 'geeks for geeks'
现在我们在 str1 上调用 strip 方法并将 str2 = 'ekgs' 作为参数传递。
现在Python解释器从左边开始跟踪str1。如果str2中存在str1的字符，它会删除它。
否则它将停止跟踪。
现在Python解释器从右边跟踪str1。如果 str1 的字符存在于 str2 中，它将删除它。
否则它将停止跟踪。
现在它终于返回了结果字符串。
当我们在没有参数的情况下调用 strip() 时，它会删除前导和尾随空格。

Python3

# Python Program to demonstrate use of strip() method without any argument
str1 = """    geeks for geeks    """
 
# Print the string without stripping.
print(str1)
 
# Print string after removing all leading
# and trailing whitespaces.
print(str1.strip())

输入：

geeks for geeks     

输出：

geeks for geeks

实际应用：
给定一个字符串，从开头和结尾删除单词“the”的出现。

Python

# Python3 program to demonstrate the practical application
# strip()
 
 
string = " the King has the largest army in the entire world the"
 
# prints the string after removing the from beginning and end
print(string.strip(" the"))

输入：

the King has the largest army in the entire world the

输出：

King has the largest army in the entire world