Introduction In this article, we’ll be going through a few examples of how to check if a variable is a number in Python. Python is dynamically typed. There is no need to declare a variable type, while instantiating it – the interpreter infers the type at runtime: variable = 4 another_variable = ‘hello’ Additionally, a variable can be reassigned to a new type at any given time: # Assign a numeric value variable = 4 # Reassign a string value […]

Introduction Python has a set of built-in library objects and functions to help us with this task. In this tutorial, we’ll learn how to check if a file or directory is empty in Python. Distinguish Between a File and a Directory When we’d like to check if a path is empty or not, we’ll want to know if it’s a file or directory since this affects the approach we’ll want to use. Let’s say we have two placeholder variables dirpath […]

Introduction Replacing all or n occurrences of a substring in a given string is a fairly common problem of string manipulation and text processing in general. Luckily, most of these tasks are made easy in Python by its vast array of built-in functions, including this one. Let’s say, we have a string that contains the following sentence: The brown-eyed man drives a brown car. Our goal is to replace the word “brown” with the word “blue”: The blue-eyed man drives […]

Introduction String padding refers to adding, usually, non-informative characters to a string to one or both ends of it. This is most often done for output formatting and alignment purposes, but it can have useful practical applications. A frequent use case for padding strings is outputting table-like information in a table-like fashion. You can do this in a variety of ways, including using Pandas to convert your data to an actual table. This way, Python would handle the output formatting […]