pdb Debugger
Last Updated: June 6, 2026
Low Priority
15 min read
pdb is the debugger that ships with every Python install. There's nothing to download, nothing to configure, and it works the same on a laptop, a server, and a CI runner. This lesson walks through how to enter pdb, the commands used in most sessions, conditional breakpoints, post-mortem debugging on a crash, and alternatives like ipdb and pudb when the built-in feels too plain.