Summary of string built-in methods in Python

#!/usr/local/bin/python3#-*-coding:utf-8-*-name= "My wife is Mahongyan" #----------capitalized----------#print ( Name.capitalize ()) #----------character Statistics----------#print (Name.count (' m ')) #----------character beautiful print----------#print ( Name.center ((), '-') #一共打印50个字符, if not enough, use '-' on either side of the string----------to determine what the string ends with----------#print (Name.endswith (' Yan ')) # Determines whether the string ends with ' Yan ', if it is returned true#----------tab conversion----------#name1 = "My \twife is Mahongyan" #print (Name1.expandtabs (                            tabsize=30)) #将字符串中的tab the key to the specified number of spaces #----------Remove the Subscript----------' Print (Name.find (' wife ')) #取字符串 ' wife ' the first character in the string subscript #注: 1. Starting from 0, a space bar is counted as a # 2. If the string contains two ' wife ', it returns the subscript value in the first ' wife ' print (name[ Name.find (' wife '): 7]) #切片操作, start slicing from the subscript where ' W ' is, until ' e ', then remove ' wife ' ' #----------formatted----------' name2= ' my wife is {name} And she is {age} years old "Print (Name2.format (name= ' Mahongyan ', age=26)) print (Name2.format_map ({' name ': ' Mahongyan ', ' Age ': ') #参数为字典格式 ' #----------determine if the string is a pure Arabic numeral + character----------#print (Name.isalnum ()) #注: Is ' pure ' Arab numberWords and characters, if there are spaces or other special characters in the string return false#----------determine if the string is a plain English character----------#print (Name.isalpha ()) #如果字符串中含有数字或其他非英文字符, Returns false#----------determines whether the string is a decimal number----------"name3=" 0100 "Print (Name3.isdecimal ()) #注: If the string is a binary number, it also returns true ' # '----- -----Determine if the string is a valid identifier (variable name)----------"name4=" _1x "Print (Name4.isidentifier ())" #---------- Determines whether a string is an integer type----------"name5=" "Print (Name5.isdigit ())" #----------determines whether the string is lowercase----------#print ( Name.islower ()) #字符串中可以含有数字或特殊字符, that is, only determine if the letter contained in the string is lowercase #----------determine if the string is uppercase----------#print (Name.isupper ()) # The string can contain numbers or special characters, that is, only if the letters contained in the string are uppercase #----------determine if the string is a ' pure ' number----------#print (Name.isnumeric ()) #有小数点也不行, with IsDigit No big difference #----------determine if a string is a space----------' name6= ' Print (Name6.isspace ()) #一个到n个空格都返回True ' #---------- Determines whether the string is in the title format----------' name7= ' My Wife is Mahongyan ' Print (Name7.istitle ()) #即每个单词的首字母均为大写 ' #---------- Converts a string to a header format----------#print (Name.title ()) #----------Join usage----------#print (' * '. Join ([' A ', ' B ', ' C ')) #尚未理解 #----- -----The end of a string to fill the print----------#print (Name.ljust (50, "-")) #使输出的字符串长度为50, if the string length is not enough, the trailing '-' #----------string header fills the print----------#print (Name.rjust (), "-") #使输出的字符串长度为50, If the string length is not sufficient, the first padding '-' #----------converts the letters in the string to uppercase/lowercase----------' Print (Name.upper ()) #只转换所有的字母print (Name.lower ()) "#- ---------Remove the space on the left or right side of the string or enter----------"Print (" \nabc ". Lstrip ()) #去除左侧print (" ABC \ n ". Rstrip ()) #去除右侧print (" \NABC \ n " . Strip ()) #去除两侧 ' #----------Encrypt 1----------' P=str.maketrans ("ABCDEFG", "1234567") #将 "ABCDEFG" corresponds to "[email  protected]#$%^& "Print (" bad ". Translate (p)) #将密码规则p pass in the Translate function and convert" bad "to the encrypted string ' #---------- Encrypt 2----------#print (Name.translate (Str.maketrans ("ABCDEFG", "1234567")) #效果和1一样 #----------Replace----------' Print ( Name.replace (' A ', ' a ')) #将字符串中的所有的字符 ' A ' replaced by ' a ' Print (Name.replace (' A ', ' a ', 2)) #将字符串中的前两个 ' a ' replaced with ' a '---------- Search----------#print (name.rfind (' y ')) #从左往右遍历字符串并返回字符 ' Y ' the largest subscript in the string #----------conversion list----------' Print (Name.split () #将字符串按照 a space and place it in a list print (' 1+2+3+4 '). Split (' + ')) #将字符串按照字符 ' Y ' split and put in a list in turn, but the character ' Y ' disappears print ("1\n2\n3\n4 ". Splitlines ()) #将字符串按照换行符分割, and put in a list" #----------to find----------"Print (Name.startswith (' My)) # Look in the string for the existence of the string ' my ' if there is a return Trueprint (Name.startswith (' my ', 0,4)) #在字符串下标为0 to find out if there is a string ' my ', if there is a return true ' #---------- The letter case Conversion----------#print (Name.swapcase ()) #将字符串中的大写字母转换成小写, lowercase letters are converted to uppercase #----------16 binary----------#print (name.zfill

　　

Summary of string built-in methods in Python