46. Python Debugging with pdb module | breakpoints | set trace | next | step | quit | Rajiv
The module pdb defines an interactive source code debugger for Python programs. It supports setting (conditional) breakpoints and single stepping at the source line level, inspection of stack frames, source code listing, and evaluation of arbitrary Python code in the context of any stack frame. It also supports post-mortem debugging and can be called under program control.
The debugger is extensible – it is actually defined as the class Pdb. This is currently undocumented but easily understood by reading the source. The extension interface uses the modules bdb and cmd.
Debugging in Python is facilitated by pdb module (python debugger) which comes built-in to the Python standard library. It is actually defined as the class Pdb which internally makes use of bdb(basic debugger functions) and cmd (support for line-oriented command interpreters) modules. The major advantage of pdb is it runs purely in the command line, thereby making it great for debugging code on remote servers when we don’t have the privilege of a GUI-based debugger.