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Comprehensive Guide to Python String Methods
Last Updated : April 25, 2025
Python has many built-in string methods to work with Python strings. In this tutorial, we will learn about the most popular string methods in Python.
1. String strip() Method
This method will return a string in which all the characters specified have been stripped from the beginning and the end of the string.
Syntax
Here is the syntax of the String strip([chars]) method:
string.strip([chars])
Here,
- chars - characters to be removed from the beginning or the end, by default space.
Example
The following is the example demonstrating the usage of the strip() method:
string="includehelp is a portal to learn concepts"
print(string)
print(string.strip('incspt')) #removes characters I, n, c, s, p, t from beg and end
print(string.strip()) #removes spaces from beg and end
The output of the above code will be:
includehelp is a portal to learn concepts
ludehelp is a portal to learn conce
includehelp is a portal to learn concepts
2. String find() Method
This method returns the position of the first occurrence of a specified string between 'beg' and 'end', where beg is inclusive and end is exclusive. If the string is not found, it returns -1.
Syntax
Here is the syntax of the String find() method:
string.find(str, beg=0, end=len(string))
Here,
- str - string to be searched
- beg - starting index, by default 0
- end - ending index, by default length of string
Example
The following is the example demonstrating the usage of the find() method:
string="includehelp is a portal to learn concepts"
print(string.find("include",0,6)) #return -1 as 6 is exclusive
print(string.find("include",0,7))
print(string.find("por"))
The output of the above code will be:
-1
0
17
3. String rfind() Method
This method returns the position of the last occurrence of the specified string. This function works similarly to find().
Syntax
Here is the syntax of the String rfind() method:
string.rfind(str, beg=0, end=len(string))
Here,
- str - string to be searched
- beg - starting index, by default 0
- end - ending index, by default length of string
Example
The following is the example demonstrating the usage of the rfind() method:
string="includehelp is a portal to learn concepts"
print(string.rfind("include",0,6)) #return -1 as 6 is exclusive
print(string.rfind("include",0,7))
print(string.rfind("por"))
The output of the above code will be:
-1
0
17
4. String split() Method
As the name specifies, it splits the string from the specified delimiter str. This method returns a list.
Syntax
Here is the syntax of the String split(str, limit) method:
string.split(str, limit)
Here,
- str - the delimiter on which to split the string. By default, it is a space.
- limit - the maximum number of splits to perform. If not specified, all occurrences are split.
Example
The following is the example demonstrating the usage of the split() method:
string="includehelp is a portal to learn concepts"
l=string.split()
print(l)
m=string.split('o')
print(m)
n=string.split('o',1)
print(n)
The output of the above code will be:
['includehelp', 'is', 'a', 'portal', 'to', 'learn', 'concepts']
['includehelp is a p', 'rtal t', ' learn c', 'ncepts']
['includehelp is a p', 'rtal to learn concepts']
5. String lower() Method
This method returns a string with all the letters in lowercase.
Syntax
Here is the syntax of the String lower() method:
string.lower()
Example
The following is the example demonstrating the usage of the lower() method:
string = "IncludeHELP"
print(string.lower()) # output: "includehelp"
6. String upper() Method
This method returns a string with all letters in uppercase.
Syntax
Here is the syntax of the String upper() method:
string.upper()
Example
The following is the example demonstrating the usage of the upper() method:
string = "IncludeHELP"
print(string.upper()) # output: "INCLUDEHELP"
7. String title() Method
This method returns a string by converting it into title case i.e. the first letter of all the words will be uppercase.
Syntax
Here is the syntax of the String title() method:
string.title()
Example
The following is the example demonstrating the usage of the title() method:
string = "includehelp is a portal"
print(string.title()) # output: "Includehelp Is A Portal"
8. String capitalize() Method
This method returns a string with only the first letter of the first word as uppercase.
Syntax
Here is the syntax of the String capitalize() method:
string.capitalize()
Example
The following is the example demonstrating the usage of the capitalize() method:
string = "includehelp"
print(string.capitalize()) # output: "Includehelp"
9. String startswith() Method
This method returns true if the string starts with the specified string 'prefix', else returns false.
Syntax
Here is the syntax of the String startswith(prefix, beg=0, end=len(string)) method:
string.startswith(prefix, beg=0, end=len(string))
Here,
- prefix - the string to be checked if it matches the beginning of the string.
- beg - the starting index to begin checking, by default 0.
- end - the ending index, optional, by default the length of the string.
10. String endswith() Method
This method returns true if the string ends with the specified string 'suffix', else returns false.
Syntax
Here is the syntax of the String endswith(suffix, beg=0, end=len(string)) method:
string.endswith(suffix, beg=0, end=len(string))
Here,
- suffix - the string to be checked if it matches the end of the string.
- beg - the starting index to begin checking, by default 0.
- end - the ending index, optional, by default the length of the string.
Example
The following is the example demonstrating the usage of the startswith() and endswith() methods:
string="Includehelp is a portal to Learn Concepts"
print(string.lower())
print(string.upper())
print(string.title())
print(string.capitalize())
print(string.endswith('rn',0,32))
print(string.startswith('rt',19))
The output of the above code will be:
includehelp is a portal to learn concepts
INCLUDEHELP IS A PORTAL TO LEARN CONCEPTS
Includehelp Is A Portal To Learn Concepts
Includehelp is a portal to learn concepts
True
True
11. String len() Method
This function will return the length of the string str given as an argument.
Syntax
Here is the syntax of the String len() method:
len(string)
Example
The following is the example demonstrating the usage of the len() method:
string = "Includehelp"
print(len(string)) # output: 11
12. String lstrip() Method
This method will remove all the characters specified from the left of the string.
Syntax
Here is the syntax of the String lstrip([chars]) method:
string.lstrip([chars])
Here,
- chars - optional parameter that specifies the characters to remove from the left end of the string. By default, it removes leading spaces.
13. String rstrip() Method
This method will remove all the characters specified from the right of the string.
Syntax
Here is the syntax of the String rstrip([chars]) method:
string.rstrip([chars])
Here,
- chars - optional parameter that specifies the characters to remove from the right end of the string. By default, it removes trailing spaces.
Example
The following is the example demonstrating the usage of the lstrip() and rstrip() methods:
string="Includehelp is a portal to Learn Concepts"
print('Length of string is',len(string))
print(string.lstrip('Isctn'))
print(string.rstrip('Instpc'))
The output of the above code will be:
Length of string is 41
ludehelp is a portal to Learn Concepts
Includehelp is a portal to Learn Conce
14. String str.join() Method
This method will return a string, which is the concatenation of the strings in 'sequence' by the separator str.
Syntax
Here is the syntax of the String join(sequence) method:
string.join(sequence)
Here,
- sequence - this is the sequence of elements (e.g., list, tuple) to be joined. The string that calls
join() will act as a separator between the elements of the sequence.
Example
The following is the example demonstrating the usage of the join() method:
str=' '
l=('Include','help','is','a','portal','to','learn')
print(str.join(l))
str='_'
l=('Include','help')
print(str.join(l))
The output of the above code will be:
Include help is a portal to learn
Include_help
15. String isalpha() Method
This method returns true if the string only contains alphabets, else returns false.
Syntax
Here is the syntax of the String isalpha() method:
string.isalpha()
Here,
- isalpha() - returns
True if all characters in the string are alphabetic, otherwise returns False.
16. String isalnum() Method
This method returns true if the string is a combination of alphabets and numbers only, else returns false.
Syntax
Here is the syntax of the String isalnum() method:
string.isalnum()
Here,
- isalnum() - returns
True if all characters in the string are alphanumeric (consisting of only letters and numbers), otherwise returns False.
Example
The following is the example demonstrating the usage of the isalpha() and isalnum() methods:
string="Includehelp"
string1="Include help"
string2='123456'
string3='12345Hii'
print(string.isalpha())
print(string1.isalpha()) #It will return False as string1 contains a space
print(string2.isalnum())
print(string3.isalnum())
The output of the above code will be:
True
False
True
True
17. String count() Method
This method will count the occurrence of the substring between specified indices.
Syntax
Here is the syntax of the String count(str, beg=0, end=len(string)) method:
string.count(str, beg=0, end=len(string))
Here,
- str - the substring to be counted in the string.
- beg - the starting index, by default 0.
- end - the ending index, by default the length of the string.
Example
The following is the example demonstrating the usage of the count() method:
string="Includehelp"
print(string.count("l"))
print(string.count("l",0,4))
The output of the above code will be:
2
1
Python String Methods Exercise
Select the correct option to complete each statement about Python string methods.
- The method str.upper() is used to:
- The method str.strip() is used to:
- The method str.split() is used to:
- The method str.replace() is used to:
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