Python string built-in function summary

Python string common built-in functions

Method	Description
String.capitalize ()	Capitalize the first letter of a string
String.center (width)	Returns the center of the original string and fills the new string with a space of length width
String.count (str, beg=0, End=len (String))	Returns the number of occurrences of STR in a string, if beg or end specifies that the number of STR occurrences in the specified range is returned
String.expandtabs (tabsize=8)	Convert the tab character in string to a space, the default number of spaces Tabsize is 8
String.find (str, beg=0, End=len (String))	Detects if STR is contained in a string, and if beg and end specify a range, the check is contained within the specified range, and returns 1 if the index value is returned.
String.index (str, beg=0, End=len (String))	Just like the Find () method, only if STR does not report an exception in string.
string.isalnum ()
string.isalpha ()
String.isdecimal ()	Returns True if the string contains only a decimal number, otherwise False.
String.isdigit ()	Returns True if the string contains only a number, otherwise False.
String.isspace ()	Returns True if the string contains only spaces, otherwise False is returned.
String.Join (seq)	Merges all the elements in the SEQ (the string representation) into a new string, using string as a delimiter
String.ljust (width)	Returns the left alignment of an original string and fills the new string with the width of length with a space
String.Lower ()	Converts all uppercase characters in a string to lowercase.
String.lstrip ()	Truncate the left space of a string
Max (str)	Returns the largest letter in the string str.
Min (str)	Returns the smallest letter in the string str.
String.rjust (width)	Returns the right alignment of the original string and fills the new string with the width of the length with a space
String.rstrip ()	Removes a space at the end of a string string.
String.Split (str= "", Num=string.count (str))	Slice string with a delimiter of STR, if NUM has a specified value, only the NUM substring is delimited
String.splitlines (Num=string.count (' \ n '))	Returns a list that contains rows as elements, separated by rows, and if num specifies that only num rows are sliced.
String.startswith (obj, Beg=0,end=len (string))	Checks whether the string starts with obj, returns True, or False. If beg and end specify a value, the check is within the specified range.
String.strip ([obj])	Execute Lstrip () and Rstrip () on string
String.swapcase ()	Flip the case in a string
String.upper ()	Convert lowercase letters in string to uppercase
String.zfill (width)	Returns a string of length width, the original string is right-aligned, and the front padding is 0

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