07-python-string manipulation

1. Common string manipulation

1Name ='My name is Druid'2 3 Print(Name.capitalize ())#Capitalize first letter4 Print(Name.count ('D'))5 Print(Name.center (50,'-'))#A total of 50 characters are printed, the string is placed, and the bits are not enough-filled6 Print(Name.ljust (50,'*'))#print a total of 50 characters, string left, not enough bit with * fill7 Print(Name.rjust (50,'~'))#print a total of 50 characters, string to right, not enough bits to fill with ~8 Print(Name.endswith ('D'))#whether to end with the string ' d '9 Print(Name.expandtabs (tabsize=30))#Tab key is 30 spacesTen Print(Name.find ('D'))#returns the first index of a character, not found returns 1 One Print(Name[name.find ('D'):])#slices A Print('Druid'. RFind ('D'))#returns the index of the last character - Print(Name.index ('D'))#returns the index, no error is found - Print(Name[name.index ('D'):])#slices the  -s ='a123a' - Print(S.isalnum ())#whether it is alphanumeric - Print(S.isalpha ())#Whether it is a plain English character + Print(S.isdecimal ())#whether it is a decimal - Print(S.isdigit ())#whether it is an integer + Print(S.isidentifier ())#whether it is a valid identifier (variable name) A Print(S.islower ())#whether it is lowercase at Print(S.isnumeric ())#whether there are only numbers - Print(S.istitle ())#whether the beginning of each word is uppercase - Print(S.isupper ())#is uppercase - Print("'. Join ('druid! ')) )#connect an iterative object with a string in ' ' - Print('+'. Join (['a','b','C'])) - Print('DruiD'. Lower ())#lowercase in Print('Druid'. Upper ())#Uppercase -  to Print('\ Druid'. Lstrip ())#Remove left space and line break + Print('druid \ n'. Rstrip ())#Remove right space and line break - Print('\ Druid \ n'. Strip ())#remove spaces and line breaks on both sides the  *p = Str.maketrans ('ABCDE','12345')#the preceding string is replaced with the following string $ Print('ABCDE'. Translate (p))#if the preceding string and the string in P have the same character, replace thePanax Notoginseng Print('Druid ABCDE'. Translate (p))#The characters in the preceding string and the string in P are not replaced -  the Print('Druid'. replace ('D','D', 1))#Replace the first character, and if you do not add 1, replace all +  A Print('Druid Chenc'. Split ())#by default, the characters are separated by a space, resulting in a list the Print('Druid Chenc'. Split ('D'))#use D as delimiter + Print('Druid Chenc'. Split ('C'))#with C as the delimiter - Print('1+2+3'. Split ('+'))#with + as delimiter $ Print('1+2\n+3+4'. Splitlines ())#delimited by line break $  - Print('Druid Chen'. Zfill (50))#left with 0 padding -  theName1 ='My name is {name},age {age}' - Print(Name1.format (name ='Druid', age = 18))Wuyi Print(Name1.format_map ({'name':'Alex',' Age': 33}))

07-python-string manipulation