Overview

This section describes string functions, including their syntax, parameters, and usage examples.

Function List

Type	Function	Description
Multi-string operations	str_format	Formats a string in a specified format.
	str_join	Generates a new string by connecting the input strings using a connector.
	str_zip	Splits the strings of two values or expressions concurrently and then combines them into one string.
Sorting, inversion, and replacement	str_sort	Sorts strings.
	str_reverse	Reverses a string.
	str_replace	Replaces an old string with a new string according to rules.
	str_translate	Replaces specified characters in a string based on the mapping.
Common operations	str_strip	Deletes specified characters from a string.
	str_lstrip	Deletes specified characters at the beginning of a string.
	str_rstrip	Deletes specified characters at the end of a string.
	str_lower	Converts all uppercase characters in a string to lowercase characters.
	str_upper	Converts all lowercase characters in a string to uppercase characters.
	str_title	Converts the first letter of each word in a string to uppercase and the other letters to lowercase.
	str_capitalize	Converts the first letter of a string to uppercase and the other letters to lowercase.
	str_swapcase	Converts the uppercase and lowercase letters of a string.
Search and judgment	str_count	Calculates the number of occurrences of a character in a string.
	str_find	Checks whether the original string contains the specified substring.
	str_rfind	Searches for the last occurrence of specified characters a string.
	str_endswith	Checks whether a string ends with a specified suffix.
	str_startswith	Checks whether a string starts with specified characters.
Splitting	str_split	Splits a string by specifying delimiters.
	str_splitlines	Splits a string by specifying newline characters.
	str_partition	Splits a string into three parts from left to right based on the specified delimiters.
	str_rpartition	Splits a string into three parts from right to left based on the specified delimiters.
Format	str_center	Expands a string to a specified length with specified characters.
	str_ljust	Expands a string to a specified length with specified characters starting from the end of the string.
	str_rjust	Expands a string to a specified length with specified characters starting from the beginning of the string.
	str_zfill	Expands a string to a specified length with the character 0 starting from the beginning of the string.
	str_expandtabs	Converts \t in a string to a space.
Character set check	str_isalnum	Checks whether a string consists of only letters and digits.
	str_isalpha	Checks whether a string consists of only letters.
	str_isascii	Validates whether a string contains only ASCII characters.
	str_isdecimal	Checks whether a string consists of only decimal characters.
	str_isdigit	Checks whether a string consists of only digits.
	str_isidentifier	Checks whether a string is a valid Python identifier.
	str_islower	Checks whether a string consists of only lowercase letters.
	str_isnumeric	Checks whether a string consists of only digits.
	str_isprintable	Checks whether all characters in a string are printable characters.
	str_isspace	Checks whether a string consists of only space characters.
	str_istitle	Checks whether the first letter of each word in a string is uppercase and whether other letters are lowercase.
	str_isupper	Checks whether all letters in a string are uppercase.
	str_uuid	Randomly generates a UUID.