How to Debug Using ‘pdb’ in Python

Here’s how to debug python script using pdb in terminal ( command line). It’s an useful presentation to know how to use pdb

Here you can set and clear the breakpoints. And, you can set values to variables. Keep handy the listed commands. Here is How to avoid syntax errors in python.

To start debugging, you need a ‘pdb’ package in Python.

Python Pdb

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

$python -m pdb sample.py

How to use ‘pdb’ in Command Line to Debug Python Script

How to debug using pdb

Python ‘pdb’ Debugging 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 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.

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Author: Srini

Experienced software developer. Skills in Development, Coding, Testing and Debugging. Good Data analytic skills (Data Warehousing and BI). Also skills in Mainframe.