Debugging Python with pdb: A Comprehensive Guide

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Introduction: Debugging is an essential skill for any programmer. Python provides a built-in debugger called pdb that allows you to interactively debug your code. This guide will help you understand how to use pdb effectively to find and fix errors in your programs.

Objective: By the end of this guide, you will be able to set breakpoints, inspect variables, and step through Python code using pdb.

What is pdb? Python Debugger, commonly known as pdb, is an interactive source code debugger for Python programs. It offers features like setting breakpoints, stepping through code, and inspecting program execution at different stages.

Why Use pdb?

• Easily trace errors and bugs in your code.
• Inspect values of variables at any point in code execution.
• Control and visualize the flow of program logic.
• No need for external tools; it’s built into Python.

Sample Python Code with pdb:

def add(a, b):
    return a + b

def subtract(a, b):
    return a - b
def main():
    import pdb; pdb.set_trace()  # Set a breakpoint
    x = 5
    y = 10
    result_add = add(x, y)
    result_subtract = subtract(x, y)
    print(f"The addition…