Learn Programming the Right Way

Django’s development server, runserver, is a lightweight web server included with Django that is used for testing and local development. By default, runserver serves Django’s web application on port 8000, but you may want to use a different port for various reasons. This article will explain how to specify a custom port when running runserver.…

If you’re working with decimal values in Django, the DecimalField is a useful field type to consider. This field type allows you to store precise decimal values in your Django models, and offers a range of customization options to suit your needs. In this article, we’ll look at how to use the DecimalField and explore…

One common cause of the “no such column” error is an incorrect database table structure. This can happen if you’ve made changes to your Django models but have not properly migrated those changes to your database. To fix this issue, you’ll need to run the makemigrations and migrate commands to apply your model changes to…

If you’re working with Django and trying to filter out results that are not equal to a certain value, you may have run into some issues. This is because while QuerySets contain many built-in operators such as exact to match if a certain value does equal a particular value, there is no filter operator to…

Django is a powerful web framework for Python that simplifies the process of building and maintaining complex web applications. One useful feature it offers is the auto_now field, which automatically sets the field’s value to the current date and time whenever an object is saved. In this article, we’ll explore the benefits of using auto_now,…

Django is a powerful web framework for Python that simplifies the process of building and maintaining complex web applications. One useful feature it offers is the auto_now_add field, which automatically sets the field’s value to the current date and time whenever an object is created. In this article, we’ll explore the benefits of using auto_now_add,…

The main difference between auto_now_add and auto_now is when they update the value of the field they are applied to. auto_now_add is a field option for Django’s DateTimeField that automatically sets the field’s value to the current date and time whenever an object is created. It is used to track the creation time of an…

There are several reasons why you might see the “TemplateDoesNotExist” error in Django: How to Fix the TemplateDoesNotExist Error Here are some steps you can take to troubleshoot and fix the “TemplateDoesNotExist” error: Check the TEMPLATES Setting The first thing you should check is the TEMPLATES setting in your Django settings file. Make sure that…

In this project, you will build a program that generates a random poem using a predefined structure and a list of words. Let’s Build The Project! Step 1: Import the necessary libraries The first step is to import the libraries that we will use in our program. We will need the random library to generate…

In this project, you will build a simple calculator that can perform basic arithmetic operations (addition, subtraction, multiplication, and division). Here are the steps you can follow to complete this project: Simple Calculator Steps Step 1 Start by creating a new Python file. Step 2 Define a function called calculator that takes in two numbers…

Python is a popular, high-level programming language known for its simplicity, readability, and versatility. It is widely used in a variety of industries and applications, from web development and data analysis to artificial intelligence and scientific computing. In this article, we will explore where Python is used and discuss some of its most common applications.…

Python’s structural pattern matching, introduced in Python 3.10, is a powerful and expressive tool for writing code that can handle a variety of different data structures and types. It is similar to a switch statement in other languages, as it provides a way to handle multiple cases or conditions in a structured way. However, unlike…

Whether you’re working with files in your local file system or interacting with a remote server, it’s important to know how to check if a file exists in Python. In this article, we’ll go over the various methods you can use to test if a file exists in Python, as well as some common pitfalls…

Multiline comments, also known as block comments, allow you to write multiple lines of comments in your code. This can be particularly useful when you want to leave extensive notes or explanations about your code. In this article, we’ll take a deep dive into Python’s multiline comments and how you can use them effectively in…

To pretty print JSON in Python, we can use the built-in json module’s dumps function, which stands for “dump string.” This function takes a Python object (such as a dictionary or list) and converts it to a JSON string. Here’s an example of using loads and dumps to pretty print a JSON string: The output…

The most straightforward way to convert an integer to a string in Python is to use the built-in str() function. This function takes any object as an argument and returns a string representation of that object. To convert an integer to a string using the str() function, simply pass the integer as the argument. Here…

In Python, there are several built-in modules for manipulating file paths, including the os module and the ntpath module. Both of these modules provide functions for extracting the filename from a file path, but the ntpath module is specifically designed to work properly on all operating systems for all types of file paths. The ntpath.basename…

When working with data in Python, it’s not uncommon to encounter duplicates. Whether you’re working with a list, a pandas DataFrame, or some other data structure, removing duplicates can be an important step in your data cleaning process. In this article, we’ll take a look at a few quick and easy ways to drop duplicates…

The easiest way to change the working directory in Python is to use the os module. This module provides functions for interacting with the operating system, including the ability to change the working directory. To use the os module, you’ll need to import it into your script. Here’s an example of how to import the…

dropna is a function that is available in the Pandas library, which is a popular and widely-used library for data manipulation and analysis in Python. If you are working with a Pandas DataFrame, you can use dropna to remove missing or null values from your data. Here is a simple example of how to use…

Ping is a simple network utility that is used to test the connection between two devices on a network. When you ping a device, you send a small packet of data to the device and wait for a response. If the device responds, it means that it is online and able to communicate over the…

In Python, a set is an unordered collection of unique elements. Sets are useful for performing operations such as set intersection, set union, and set difference. In this article, we will focus on understanding and implementing the intersection operation in Python. What is Set Intersection? Set intersection is a mathematical operation that takes two sets…

Python is a powerful programming language that comes with a wide range of built-in exceptions to handle various errors and exceptions that may occur during the execution of a program. However, sometimes the built-in exceptions may not be sufficient to handle the specific errors or exceptions that you may encounter in your code. In such…

Have you ever needed to send data from one computer to another quickly and efficiently? If so, you may be interested in learning about the User Datagram Protocol (UDP) and how to use it in Python. In this article, we will cover the basics of UDP, how to send data using Python’s built-in socket library,…

Python’s built-in hashlib library provides a convenient way to generate secure hash values using a variety of algorithms, including SHA256. In this article, we’ll take a closer look at what SHA256 is and how it can be used in Python. What is SHA256? SHA256 (Secure Hash Algorithm 256-bit) is a cryptographic hash function that produces…

Have you ever found yourself with two separate lists in Python that you want to combine into a single dictionary? Look no further! In this article, we will explore multiple ways to turn two lists into a dictionary in Python. Method 1: Using the Zip Function One of the easiest and most straightforward methods for…

First, it is important to determine exactly what characters you are talking about when you think of “special characters” because it will depend a lot on your use-case. Do you mean all non-alphanumeric characters? And if so, what about non-English alphanumeric characters such as 你 (Chinese) or á (Spanish)? What about whitespace characters such as…

Python’s None value is a special object that represents the absence of a value or a null value. It is an object of its own datatype, the NoneType. In Python, you can use the is operator to test if an object is None. For example: This is the recommended way to test for None in…

PNG (Portable Network Graphics) and GIF (Graphics Interchange Format) are two popular image file formats. PNG is a lossless format that is often used for images with a large number of colors or with detailed graphics, while GIF is a lossless format that is often used for simple graphics or images with a limited number…

Alphanumeric refers to a combination of letters and numbers. In Python, there are several ways to check if a string is alphanumeric. In this article, we will explore two methods: using the built-in isalnum function and using regular expressions (regex). The isalnum Function The isalnum function is a built-in Python method that checks if a…

In this article, we’ll be exploring the built-in os.getenv() function, which allows you to retrieve the value of an environment variable in your operating system. What are Environment Variables? Before diving into the specifics of os.getenv(), let’s first define what environment variables are. In general, environment variables are key-value pairs that are stored in your…

Resizing images is a common task in image processing, and Python’s OpenCV library provides several methods for resizing images using the cv2 module. In this article, we will explore the different options for resizing images using OpenCV and cv2, including how to resize images to specific dimensions, how to maintain the aspect ratio of an…

To import a module from a parent directory in Python, you can use the sys.path.append function to add the directory to the Python path, and then use the import statement to import the module. For example, suppose you have the following directory structure: And you want to import the calc module from the project directory in the project/child/script.py file. You can do this by adding…

To convert a binary number to decimal in Python, you can use the int function with the base parameter set to 2. This tells Python that the number being passed is in binary format. For example: Decimal to Binary To convert a decimal number to binary in Python, you can use the bin function. This…

If you’re using Python 3, you may have encountered the NameError: name ‘xrange’ is not defined error when running your code. This error occurs when you try to use the xrange function, which is not defined in Python 3. In this article, we’ll explain what xrange is, why it’s not defined in Python 3, and…

In Python, map() is a built-in function that applies a function to each element of an iterable (such as a list, tuple, or string) and returns a map object with the results. For example: A for loop is used to iterate over a sequence (such as a list, tuple, or string) and perform a block…

The best way to get all object attributes in Python is to use the built-in dir() function. This function returns a list of all of the object’s attribute names, including inherited ones: And notably it works with objects that implement __slots__. We can combine this with a dictionary comprehension to get all of the attributes…