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In C++, the is a header file. This file includes all standard library. Sometimes in some coding contests, when we have to save time while solving, then using this header file is helpful. In software engineering approach we should reduce the minimize the include. Using this header file, it will include lots of files, sometimes that may not be required in the program. So it may increase the compile time and program size. The disadvantages of this header file is listed below. This is ... Read More
Hexadecimal is a base 16 numbering system that uses 16 digits (from 0 to 9, and then A to F) to represent numbers. It is commonly used in computing systems to represent and store data. In this article, we will learn how to convert a normal integer to a hexadecimal string using C++ program. Integer to Hex String Conversion Here is a list of approaches for converting an integer to a hexadecimal, which we will be discussing in this article with stepwise explanation and complete example codes. Using std::stringstream ... Read More
What are Python File Extensions? Python file extensions are the suffixes that are added to the end of file names, which indicate the type of content inside the file and how it relates to the Python programming environment. These extensions help the interpreter, operating system, and developers understand how to process or execute the file. The .py, .pyc, .pyo, and .pyd files are the most commonly used Python file extensions and have their significance when it comes to executing python programs. Here are the Python file extensions and their descriptions - .py: The input source code that you've written. ... Read More
In Python, both single quotes (') and double quotes (") are used to define string literals, and they function in the same way. For example, if a string contains a single quote character, like in a contraction, i.e., it’s by using double quotes avoids the need for escape characters by making the code cleaner and easier to read. Similarly, single quotes can be useful when a string contains double quotation marks. Single Quotes in Python Single quotes are used to wrap small and short strings in Python, such as string literals or identifiers. We must remember that using single quotes ... Read More
Through the command line, we can easily create dynamic scripts that modify or generate files based on user input. This functionality is useful for generating logs, exporting data, or saving outputs from calculations. The following are the basic steps we need to follow to write data into a file from the command line - Accept the file name and optional data from the command line. Open the specified file in write mode. Write the content to the file. Handle possible errors such as ... Read More
Reading files from the command line is a common task in many Python scripts and automation workflows. Whether we’re building a simple utility to process text files or developing a complex data analysis tool that being able to accept file input directly from the command line, which enhances the flexibility and usability of our program. Python provides built-in modules such as sys and argparse that make our task straightforward and efficient. In this article, we are going to see the different methods that are used to read a file from the command line using Python - Using sys.argv() In Python, ... Read More
A statement is a logical instruction in Python that the Python interpreter can read and execute. It could be an expression or an assignment statement in Python. Python's assignment statement is fundamental. It specifies how an expression generates and stores objects. In a simple assignment, we create new variables, assign values to them, and alter them. To maintain the value of the expression, this statement supplies an expression and a variable name as a label. Following is the syntax of using the statement in python − variable = expression Creating Multi-Line Statements in Python Statements in Python are often ... Read More
Importing Python Modules by Full Path Python has various tools to import modules dynamically, where the full path is accessible. In this article, we will explore various methods to import Python modules when the full path is given, and each method has its own advantages for various use cases. In Python, it is common to import modules using statements such as import os or from mypackage, import utils. But, Imagine a situation, Where we need to import the Python module given the full path, Let's dive into the article to learn more about it. Using importlib.util.spec_from_file_location() The Python provides functions ... Read More
In Python, it is possible to source one Python file from another, which enables us to share data between scripts. In this article, we will go through the different ways to source a Python file from another Python file. Understanding Python File Importing In Python, the process of importing makes to use functions, classes, and variables defined in one Python file within another. This helps us in code reusability and enables us to split our code into multiple files based on functionality. Using the import Statement One of the most common ways to import a Python file is by using ... Read More
The common header format of Python files is a simple and essential element in any Python script. The Header Format is just an introduction that provides context. In Python, we commonly use a docstring as the header format. A docstring is a special kind of comment enclosed within triple quotes, i.e., either single or double. It's placed right at the beginning of the script, even before any import statements, making it easily visible and accessible to anyone who reads the code. The standard structure of a Python file header is adorned with a docstring. Following is an example of ... Read More