strip()函数是Python的一个预定义库功能。它通过移除传递给strip()函数的前导和尾随空格、字符和符号,用于返回原始字符串的副本。换句话说,将一组字符作为参数传递给Python字符串的strip()函数,然后从字符串的左右两端删除字符。如果不给strip()函数传递参数,则默认删除字符串开头和结尾的空格。

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Python中的strip()函数

语法

strip( 'characters' )  

参数:

  • strip或"chars":strip()函数的可选参数。因此,如果程序员不传递任何参数,strip()函数会从字符串的开头和结尾删除空格。
  • 如果传递给strip()函数的字符集,它会从第一个字符串中删除字符或图像。
  • 返回值:通过从原始字符串中删除字符集或空格,它会返回其副本。

使用strip()函数从给定字符串中删除字符或符号

让我们考虑一个示例,通过在Python中删除给定字符串的前导或尾随字符来执行strip()函数。

Strip.py

strinput = "  $$$$$  No. 1 Welcome to javatiku!! No. 1 $$$ "     
# use strip() function to remove the set of characters  
res = strinput.strip ( ' $No. 10 !' ) # store result into res variable  
print ( " Given string is: ", strinput)  
print ( " After removing the set of characters: ", res)   
  
str3 = ' 1 11 111 111 1111 Learn Python Programming Tutorial 1111 111 11 1 '  
str4 = str3. strip ( '1' )  
print (" \n  Given string is ", str3)  
print (" Stripping 1 from both ends of the string using strip ('1') function ", str4)  
  
# define new string  
str5 = '++++++Python Programming Tutorial****** $$$$$'  
print ("\n Given string is = ", str5)  
# use strip function to remove the symbols from both ends  
str6 = str5. strip ( ' $*+' )  
print (" Stripping the '+', '*' and '$' symbols on both sides of the string is = ", str6)  

输出

Given string is:    $$$$$  No. 1 Welcome to javatiku!! No. 1 $$$ 
 After removing the set of characters:  Welcome to javatiku

 Given string is   1 11 111 111 1111 Learn Python Programming Tutorial 1111 111 11 1
 Stripping 1 from both ends of the string using strip ('1') function   1 11 111 111 1111 Learn Python 
Programming Tutorial 1111 111 11 1

 Given string is =  ++++++Python Programming Tutorial****** $$$$$
 Stripping the '+', '*' and '$' symbols on both sides of the string is =  Python Programming Tutorial

使用strip()函数从给定字符串中删除空格

让我们考虑一个示例,通过在Python中删除给定字符串的前导或尾随空格来执行strip()函数。

Strip2.py

str1 = '   Welcome to the World!              '  
# print the original string  
print (' Given string is: ', str1)  
  
# use strip() function to remove whitespace  
str2 = str1.strip()  
print(" After removing whitespaces from an original string: ", str2)  
  
str3 = '             Learn    Python    programming          '  
# print the original string  
print (' Given string is: ', str3)  
  
# use strip() function to remove whitespace  
str4 = str3.strip()  
print(" After removing whitespaces from an original string: ", str4)  

输出

Given string is:     Welcome to the World!
 After removing whitespaces from an original string:  Welcome to the World!
 Given string is:               Learn    Python    programming
 After removing whitespaces from an original string:  Learn    Python    programming

在上面的程序中,我们使用strip()函数从给定字符串的开头和结尾删除空格,但它不会删除字符串中间的空格。

从用户获取任何字符串并使用strip()函数删除任何字符或符号的程序

Prog.py

str1 = input( " Enter the string ") # take a string   
print (" Your string is ", str1)   
ch = input (" Enter any character or symbol that you don't want to see in the string ")  
res = str1.strip (ch)   
# print the string after using a strip() method  
print (" After performing the strip() function, \n Your string is ", res)  

输出

Enter the string *** $$ Welcome to javatiku. Learn Python programming !!! &&
 Your string is  *** $$ Welcome to javatiku. Learn Python programming !!! &&
 Enter any character or symbol that you don't want to see in the string * $ Wel ! &
 After performing the strip() function, 
 Your string is  come to javatiku. Learn Python programming

为什么要使用Python的strip()函数?

使用Python的strip函数的原因如下:

  • 它帮助从第一个字符串的前面和后面删除字符,考虑到strip()函数之前的字符。
  • 如果用户不传递字符给它,strip函数默认只删除字符串两端的空格。
  • 如果在开头或结尾没有空格,它会返回原始字符串而不做任何更改。
  • 如果传递的字符与原始字符串不匹配,strip函数会返回原始字符串。

结论:

在前面的主题中,我们了解了Python库的strip()函数。这是一个用于从第一个字符串的开头和结尾删除字符或空格的strip()函数。然而,如果用户不传递字符,strip()函数只会删除主字符串的前导和尾随空格。

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