---
title: "How to Debug Using ‘pdb’ in Python"
description: "Debugging in Python explained the commands you need. And explained the steps you need to start debug session."
url: https://srinimf.com/2020/08/02/how-to-debug-py-module-using-pdb/
date: 2020-08-02
modified: 2026-10-10
author: "Srini"
image: https://i0.wp.com/srinimf.com/wp-content/uploads/2020/08/pexels-photo-4348401.jpeg?fit=1880%2C1258&ssl=1
categories: ["Python"]
tags: ["pdb commands", "pdb tutorial"]
type: post
lang: en
---

# How to Debug Using ‘pdb’ in Python

Here is a topic to use the pdb utility for debugging the python program. Below, you’ll find set and clear the breakpoints set values to variables. A handy list of commands helpful for projects.

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## **Step-1: Import pdb package **

See me example Python script – sample.py. Here, you’re importing pdb and debugging.

```
$python -m pdb sample.py
```

## **Step-2: How to use pdb commands at Command-line **

Below is the video that shows the usage of pdb commands at the command-line.

*pdb commands*

## **Handy list: pdb commands**

1. Command to List source code:

- l – it displays 11 lines of source code
- ll – it display entire source codes

2. Command to Set break point:

- b 10 – it sets break point at line 10.

3. Command to Continue:

- c – it continues execution.

4. Command [to debug](https://srinimf.com/2012/06/14/cics-online-xpediter/) line by line:

- s – just executes one line.

5. Command to Execute next line.

- n – it executes next line.

6. Command to Execute up level:

- u 10 – execution up 10 lines.

7. Command to Execute down level:

- d 10 – execution down 10 lines.

9. Command to Quit from debugger:

- q – to quit from debugger.

**References**

- [List of top debugger Commands in Python.](https://docs.python.org/3/library/pdb.html)

## 12 Python Interview Questions

These questions useful for your next interview and to use in your project.

[Click to read](https://srinimf.com/2020/02/23/12-frequently-asked-python-interview-questions/)

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