python string methods

 Python string methods:

• Before going to string methods first of all we have to know what is meant by string.
• A "String is a set of or group of characters."
• The string always must be closed with single, double, or triple codes.
• Triple codes (''' ''') are used for multi-line purposes.
• In python, we are having some string functions, that are used to operate on strings.
• As the string is immutable it always returns the new values only. The old values cannot be replaced.
• The string function is defined as str().

Example:

#1.write python code using the str() methods.

1. s'"Hello"
2. print(s[0])
3. print(s[1])
4. print(s[2])
5. print(s[3])
6. print(s[4])

output:  H

              e

              l 

              l

             o

#2. write a python code using str() functions.

1. str="Hello"
2. print(str.lower())
3. print(str.upper())
4. print(str.count(str))

output: hello

             HELLO

              1

• In the following table, we will find more functions and their respective actions in the string.

Method	Description
len()	used to determine the length of the string.
isalnum()	used to define the string is alphanumeric.
islower()	To define a string is in small letters.
isupper()	To define a string is in capital letters.
isnumeric()	The string consists of only numbers.
istitle()	The string is in the title case.
isspace()	The string has only white space.
find()	Searches the string value and returns the position.
format()	Formats specified values in a string
format_map()	Formats specified values in a string
index()	returns the position of string where it was found
count()	Returns the number of times string occurs.
stratswith()	the string starts with the given prefix.
isdecimal()	all characters in the string are decimals
isdigit()	all characters in the string are digits
isidentifier()	Returns True if the string is an identifier
endswith()	all characters in the string end with the given suffix.
encode()	it encodes the string.
isprintable()	all characters in the string are printable.
capitalize()	it returns all the capital strings.
center()	Returns the center string.
_contain_()	the string we check is contained in another string or not.
join()	Joins the elements of the string.
ljust()	Returns a left-justified version of the string
hash()	Returns the hash value of the given object.
lstrip()	Returns a left trim version of the string
maketrans()	Returns a translation table to be used in translations
partition()	Returns a tuple where the string is parted into three parts
replace()	string where a value is replaced with another value.
rfind()	Search the string and returns the last position.
rindex()	Search the string and returns the last position.
rjust()	Returns a right-justified version of the string
rpartition()	Returns a tuple where the string is parted into three parts
rsplit()	Splits the string at the specified separator, and returns a list
rstrip()	Returns a right trim  of the string
split()	Splits the string at the specified separator, and returns a list
splitlines()	Splits the string at line breaks and returns a list
id()	Returns the identity of the string.
strip()	It trims the space between the strings.
swap case()	In this, the lower case becomes the upper case and vice versa
title()	Converts the first character of each word to upper case
translate()	Returns a translated string
upper()	Converts a string into the upper case.
zfill()	Fills string with a specified number of 0's at the beginning.