How To Use the Python Debugger aka pdb

I have been using the Python Debugger aka pdb docs for 2.7/docs for 3.5 a lot recently and wanted to share a cheat sheet I found and also the common commands I use.

The cheatsheet:

pdb cheatsheet

The easiest thing to do is put the following in your code somewhere:

    import pdb; pdb.set_trace()

Then when you run it, it will stop there and you can step through the code a line at a time. The l(ist) command will show you 11 lines of code around the current line is the one I use the most. s(tep), n(ext), r(eturn) are some other I use regularly.

Once the debugger is up, you can check the stacktrace w(where), variable values a(rgs) or [variable_name] or many other things. Please check the documentation or the cheatsheet image above.

A much more in-depth usage of pdb can be found here

Cheatsheet image credit

Jason Meridth

jmeridth

My name is Jason Meridth. I am a continuously learning senior software developer/team lead/development manager trying to not let best be the enemy of better. I reserve the right to change my mind upon obtaining more information. I am also the owner and principal software consultant at Meridth, LLC. If you have any software, hardward, networking, process, etc needs please don't hesitate to reach out to me.

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