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Debugging in Python

Python has a debugger , which is available as a module called pdb . It supports setting conditional breakpoints , stepping through the source code one line at a time, stack inspection, and more.

Insert pdb.set_trace() anywhere and it will function as a breakpoint . When you execute the script by python, you will in the debug mode.

Some useful debugging commands:

  1. b: set a breakpoint
  2. c: continue debugging until you hit a breakpoint
  3. s: step through the code
  4. n: to go to next line of code
  5. l: list source code for the current file
  6. u: navigate up a stack frame
  7. d: navigate down a stack frame
  8. p: to print the value of an expression in the current context
  9. q: quit

Running from command line of python interpreter.

If you don't like spending time in debuggers, you can dump execution trace and analyse it later. (C) 2017    Founded by raps mk
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