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Python Exception Handling
What is exception handling? Exception handling in Python is a way to manage and respond to runtime errors. When an error occurs, Python typically stops and generates an exception message. Exception handling allows you to catch these exceptions and handle them gracefully, preventing your program from crashing. Basic structure of exception handling The basic structure of exception handling in…
Python JSON
What is JSON? JSON (JavaScript Object Notation) is a lightweight data interchange format that’s easy for humans to read and write, and easy for machines to parse and generate. Python has a built-in module called json that can be used to work with JSON data. Let’s begin with a basic example and convert a JSON string to a Dictionary: # Import json module. import json data = '{"name": "Shivaay…
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Python datetime module
Python datetime module The datetime module in Python provides classes for manipulating dates and times. Here’s a quick overview of the most commonly used classes and methods in the datetime module: Some classes present in datetime module datetime.date: Represents a date (year, month, and day). datetime.time: Represents a time (hour, minute, second, microsecond). datetime.datetime: Represents…
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Best Python interview questions
Python interview questions for freshers What is python ? Python is a high-level programming language known for its simplicity and readability. It was created by Guido van Rossum and first released in 1991. Python emphasizes code readability with its clean and easy-to-understand syntax, making it a popular choice for beginners and experienced developers alike. Python supports multiple…
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How to install Python and Jupyter notebook in Windows
Installing Python on Windows is a straightforward process. Here are the steps: Download Python Go to the official Python website (python.org) and navigate to the downloads section. Choose the latest version of Python for Windows. As of my last update, Python 3.x is the latest stable version. Run the Installer Once the download is complete, run the installer by double-clicking the downloaded…
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Python Modules
What is module in python ? In Python, modules are simply files containing Python code. They can define functions, classes, and variables that you can use in other Python scripts by importing them. Modules help in organizing code and making it reusable. Creating a module in Python You create a module by writing Python code in a .py file. For example, if you have a file named util.py, it can be…
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Variable scope in Python
In Python, variable scope refers to the region of a program where a particular variable is accessible. It determines where you can access a variable within your code. Python has four levels of variable scope: Local Scope Enclosing Scope – Applied to nested function Global Scope Built-In Scope Local Scope Variables defined within a function are considered to have local scope. They can only…
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Polymorphism In Python
What is Polymorphism ? Polymorphism is a fundamental concept in object-oriented programming (OOP), including Python. It refers to the ability of different types of objects to be treated as if they are instances of a common superclass. This allows objects to be used interchangeably based on their common interface, even though they may have different implementations. In Python, polymorphism can…
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Inheritance In Python
What is Inheritance? Inheritance is the capability of one class to acquire the common state and behavior of another class while adding its own functionality . In Object-Oriented programming , the concept of inheritance provides the idea of re-usability.This means we can add additional features to a class without modifying it. In Python, inheritance is a mechanism that allows a class to inherit…
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Python Classes and Objects
What is an Object ? Object is the most basic concept and a key to understand the Object-Oriented programming . Object is an entity that has two characteristics , State and Behavior . Some examples of real world object can be : Bike , Chair , Dog etc. Lets take an example of a Bike . Bike has some state ( current gear , current speed ) and behavior ( change gear , apply brake ) . One way to…
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Python Functions
Introduction In Python, functions are reusable blocks of code that perform a specific task. They allow you to break down your program into smaller, modular components, making your code more organized, easier to understand, and easier to maintain. Functions help avoid redundancy by allowing you to reuse the same code multiple times without having to rewrite it. Defining a Function In Python,…
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Python FOR loop
Python For loop In Python, the for loop is used to iterate over a sequence of elements. This sequence can be a list, tuple, string, dictionary, or any other iterable object. The basic syntax of a for loop in Python is as follows: for item in iterable: # code block to be executed for each item Here’s a breakdown of the components: item: A variable that takes on the value of each element in the…
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Python For loop while loop
Introduction Loops are essential constructs in Python (and many other programming languages) for iterating over collections of data or executing a block of code repeatedly. There are mainly two types of loops in Python: for loops and while loops. Python While Loops A while loop is used to execute a block of code repeatedly as long as a condition is true. The basic syntax is: while…
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Python if-else and conditional expressions
In our last post, we talked about the concept of Python Dictionary. In this post we will understand Python if-else construct and conditional expressions. The if-else statement in Python is used for decision-making. It allows you to execute certain code if a condition is true and another set of code if the condition is false. Here’s the basic syntax: if condition: # Code block to execute if…
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Python Dictionary
Basic Introduction In Python, a dictionary is a collection of key-value pairs. It is a mutable, unordered collection that allows you to store data in the form of key-value pairs. Each key in a dictionary must be unique, and it is used to access its corresponding value. Keys must be immutable, meaning they cannot be changed after they are created. Values in a dictionary can be of any data type,…
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Python Sets
Introduction In previous post, we talked about the concept of python tuples. In this post, we will understand the concept of Python Set. In Python, a set is an unordered collection of unique elements. It is defined using curly braces {} or the set() constructor. Sets are mutable, meaning you can add or remove elements from them. However, unlike lists or tuples, sets cannot have duplicate…
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Python Tuples
Tuples in Python are immutable sequences, similar to lists, but with the key distinction that once created, they cannot be modified. This immutability provides certain advantages, such as being used as keys in dictionaries or elements in sets, as well as ensuring data integrity in situations where the contents should not change. Here’s a basic overview of tuples in Python: 1.Creating…
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