Python Tutorial

Introduction Python Features Python Applications System requirements for Python Python Installation Python Basics Python Variables Python Data Types Python IDE Python Keywords Python Operators Python Comments Python Pass Statement

Python Conditional Statements

Python if Statement Python elif Statement Python If-else statement Python Switch Case

Python Loops

Python for loop Python while loop Python Break Statement Python Continue Statement Python Goto Statement

Python Arrays

Python Array Python Matrix

Python Strings

Python Strings Python Regex

Python Built-in Data Structure

Python Lists Python Tuples Python Lists vs Tuples Python Dictionary Python Sets

Python Functions

Python Function Python min() function Python max() function Python User-define Functions Python Built-in Functions Anonymous/Lambda Function in Python

Python File Handling

Python File Handling Python Read CSV Python Write CSV Python Read Excel Python Write Excel Python Read Text File Python Write Text File Read JSON File in Python

Python Exception Handling

Python Exception Handling Python Errors and exceptions Python Assert

Python OOPs Concept

OOPs Concepts in Python Classes & Objects in Python Inheritance in Python Polymorphism in Python Python Encapsulation Python Constructor Static Variables in Python Abstraction in Python

Python Iterators

Iterators in Python Yield Statement In Python

Python Generators

Python Generator

Python Decorators

Python Decorator

Python Functions and Methods

Python Built-in Functions Python String Methods Python List Methods Python Dictionary Methods Python Tuple Methods Python Set Methods

Python Modules

Python Modules Python Datetime Module Python Calendar Module  

Python MySQL

Python MySQL Python MySQL Update Operation Python MySQL Delete Operation

Python MongoDB

Python MongoDB

Python Data Structure Implementation

Python Stack Python Queue Python Hash Table Python Graph

Python Advance Topics

Speech Recognition in Python Face Recognition in Python Python Rest API Python Command Line Arguments Python JSON Python Virtual Environment Type Casting in Python Collections in python Python Enumerate Python Debugger Python DefaultDict

Misc

Python PPTX Python Pickle Python Seaborn Python Coroutine Python EOL Python Infinity Python math.cos and math.acos function Python Project Ideas Based On Django Reverse a String in Python Reverse a Number in Python Python Word Tokenizer Python Trigonometric Functions Python try catch exception GUI Calculator in Python Implementing geometric shapes into the game in python Installing Packages in Python Python Try Except Python Sending Email Socket Programming in Python Python CGI Programming Python Data Structures Python abstract class Python Compiler Python K-Means Clustering List Comprehension in Python3 NSE Tools In Python Operator Module In Python Palindrome In Python Permutations in Python Pillow Python introduction and setup Python Functionalities of Pillow Module Python Argmin Python whois Python JSON Schema Python lock Return Statement In Python Reverse a sentence In Python tell() function in Python Why learn Python? Write Dictionary to CSV in Python Write a String in Python Binary Search Visualization using Pygame in Python Latest Project Ideas using Python 2022 Closest Pair of Points in Python ComboBox in Python Python vs R Python Ternary Operators Self in Python Python vs Java Python Modulo Python Packages Python Syntax Python Uses Python Logical Operators Python Multiprocessing Python History Difference between Input() and raw_input() functions in Python Conditional Statements in python Confusion Matrix Visualization Python Python Algorithms Python Modules List Difference between Python 2 and Python 3 Is Python Case Sensitive Method Overloading in Python Python Arithmetic Operators Design patterns in python Assignment Operators in Python Is Python Object Oriented Programming language Division in Python Python exit commands Continue And Pass Statements In Python Colors In Python Convert String Into Int In Python Convert String To Binary In Python Convert Uppercase To Lowercase In Python Convert XML To JSON In Python Converting Set To List In Python Covariance In Python CSV Module In Python Decision Tree In Python Difference Between Yield And Return In Python Dynamic Typing In Python Abstract design pattern in python Builder design pattern in python Prototype design pattern in Python Creational design patterns in Python

How to

How to convert integer to float in Python How to reverse a string in Python How to take input in Python How to install Python in Windows How to install Python in Ubuntu How to install PIP in Python How to call a function in Python How to download Python How to comment multiple lines in Python How to create a file in Python How to create a list in Python How to declare array in Python How to clear screen in Python How to convert string to list in Python How to take multiple inputs in Python How to write a program in Python How to compare two strings in Python How to create a dictionary in Python How to create an array in Python How to update Python How to compare two lists in Python How to concatenate two strings in Python How to print pattern in Python How to check data type in python How to slice a list in python How to implement classifiers in Python How To Print Colored Text in Python How to develop a game in python How to print in same line in python How to create a class in python How to find square root in python How to import numy in python How to import pandas in python How to uninstall python How to upgrade PIP in python How to append a string in python How to open a file in python

Sorting

Python Sort List Sort Dictionary in Python Python sort() function Python Bubble Sort

Programs

Factorial Program in Python Prime Number Program in Python Fibonacci Series Program in Python Leap Year Program in Python Palindrome Program in Python Check Palindrome In Python Calculator Program in Python Armstrong Number Program in Python Python Program to add two numbers Anagram Program in Python Even Odd Program in Python GCD Program in Python Python Exit Program Python Program to check Leap Year Operator Overloading in Python Pointers in Python Python Not Equal Operator Raise Exception in Python Salary of Python Developers in India What is a Script in Python Singleton design pattern in python

Python String Methods

Python String Methods

Python has a set of built-in string methods. The Python string methods are as follows:

capitalize() The string.capitalize() method returns a copy of the string by converting the first character to upper case. 
center() The string.center() method returns a centered in a string of length width.
count() This method returns the number of times a specified value occurs in a string.
decode() The string.decode() method decodes the string using the codec registered for encoding.
encode() The string.encode() method returns an encoded version of the string
endswith() The string.endswith() method returns a boolean value true if the specified string ends with the given value.
expandtabs() This method returns a copy of the string where all tab characters are expanded using spaces.
find() The string.find () method returns the lowest index in the string where the substring is found else it returns -1.
index() The string.index() method returns the lowest index in the string where the substring is found else it raises a ValueError.
isalnum() This method returns a Boolean value True if all characters in the string are alphanumeric
isalpha() The string.isalpha() method returns True if all characters in thespecified  string are in the alphabet.
isdigit() The string.isdigit() method returns True if all characters in the string are in digits.
islower() The string.islower() method returns a Boolean value True if all characters in the specified string are in lower case.
isspace() The string.isspace() method returns true if there are only whitespace characters in the string else it returns false.
istitle() The string.istitle() method returns true if the string is a titlecased string and follows the rules of a tittle.
isupper() The string.isupper() method returns true if all cased characters in the string are uppercase else it returns false.
join() This method joins the elements of an iterable to the end of the string
ljust() The string.ljust() method returns a left justified version of the string.
lower() The string.lower() method returns a copy of the string converted to lowercase.
lstrip() This method returns a copy of the string with leading characters removed.
replace() The string.replace() method returns a string where a specified value is replaced with the old value.
rfind() The string.rfind() method returns the highest index in the string if the substring sub is found else it raises a ValueError.
rindex() This method return the highest index in the string if the substring is found else it returns -1.
rjust() The string.rjust() method returns a right justified version of the specified string of length width.
rsplit() This method returns a list of words in the string by splitting the string at the specified separator.
rstrip() The string.rstrip() method returns a right trim version of the string
split() The string.split() method splits the specified string at separators, and returns the list.
splitlines() This method splits the given string at line breaks and returns the list.
startswith() The string.startswith() returns a Boolean value true if the specified string starts with the given prefix, else it returns False.
strip() The string.strip() method returns a copy of the string by removing the  leading and trailing characters. 
swapcase() This method returns a copy of the string with uppercase characters converted to lowercase and vice versa.
title() The string.title() method returns the titles cased string by converting the first character of each word to upper case.
translate() The string.translate() method returns a copy of the translated string.
upper() The string.upper() method returns a copy of the string converted to uppercase.
zfill() The string.zfill() method returns the numeric string left filled with a specified number of 0 values at the beginning.

Example 1

 # Python program explaining
 # the string methods
 # passing the string value
 strVal = "hello world"; 
 print("String value:",strVal)
 # the capitalize() method
 # capitalizing the first character of the String
 print ("After capitalizing the string:", strVal.capitalize())
 # the center() method
 # centering the string with length 40 and fillchar '!'.
 print("After the center() method:")
 print ( strVal.center(40, '!'))
 # the count() method
 # returning the count of alphabet 'e'
 print ("\nThe count of 'e' in the string is", strVal.count('e'))
 # the isalnum() method
 # validating if and else condition
 if strVal.isalnum() == True:
    print("\nAll characters of specified string are alphanumeric.")
 else:
     print("\nAll the characters are not alphanumeric.") 

Output

 String value: hello world
 After capitalizing the string: Hello world
 After the center() method:
 !!!!!!!!!!!!!!hello world!!!!!!!!!!!!!!!
 The count of 'e' in the string is 1
 All the characters are not alphanumeric. 

Example 2

 # Python program explaining
 # the string methods
 # initializing the string 
 strVal = "Hello everyone, welcome to my world."
 print("The string:",strVal)
 # passing the substring
 substring="welcome"
 # the index() method
 # returning the lowest index in the string if the substring
 index = strVal.index(substring)
 # prinitng the index of the specified substring
 print("The index of '",substring,"' is",index)
 # the find() method
 find= strVal.find('to')
 # prinitng the index of the specified substring
 print("The index of '",substring,"' is",find)
 # the isdigit() method
 result = strVal.isdigit()
 # printing the isdigit() result
 print("The isdigit() method returns: ",result)
 # the islower() method
 # checking whether the passed string is in a lower case or not
 result = strVal.islower()
 # printing the islower() result
 print("The islower() method returns: ",result) 

Output

 The string: Hello everyone, welcome to my world.
 The index of ' welcome ' is 15
 The index of ' welcome ' is 23
 The isdigit() method returns:  False
 The islower() method returns:  False 

Example 3

 # Python program explaining
 # the string methods
 # the isspace() method
 strVal = "   \t"
 print("String 1=",strVal)
 print("The isspace() method returns: ",strVal.isspace())
 # the isupper() method
 string = 'TUTORIALSANDEXAMPLES'
 print("\nString 2:",string)
 print("The above string is upper cased:",string.isupper())
 # the join() method
 string3 = 'Hello'
 string4 = '!!!'
 # concatenating each character of string2 to the front of string1
 print('\nstring3.join(string4):', string3.join(string4))
 # concaneting each character of string1 to the front of string1
 print('string4.join(string3):', string4.join(string3))
 # the lower() method
 # initializing the string
 string5 = "HELLO WORLD"
 print("\nString5:",string5)
 # converting the string to lower case
 lowStr = string5.lower()
 print("After converting it in lower case:",lowStr)
 # the title() method
 string6 = "My Favourite Teacher"
 print("\nString 6:",string6)
 # will return true
 print("The above string is Titlecased:",string6.istitle())  

Output

 String 1=     
 The isspace() method returns:  True
 String 2: TUTORIALSANDEXAMPLES
 The above string is upper cased: True
 string3.join(string4): !Hello!Hello!
 string4.join(string3): H!!!e!!!l!!!l!!!o
 String5: HELLO WORLD
 After converting it in lower case: hello world
 String 6: My Favourite Teacher
 The above string is Titlecased: True 



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