How to debug python code from command line

Published: 18 July 2024
on channel: CodeGen

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debugging python code from the command line can be done using the `pdb` module, which is python's built-in interactive debugger. here is a step-by-step tutorial on how to debug python code from the command line:

step 1: import the `pdb` module in your python script.

step 2: set a breakpoint in your code where you want to start debugging. this can be done by calling `pdb.set_trace()` at the desired location.

step 3: run your python script from the command line using the `-m pdb` flag.

step 4: the program will pause execution at the breakpoint set in the code. you can now use various commands to inspect variables, step through the code, and evaluate expressions.

some useful `pdb` commands include:
`n` (next): execute the current line of code.
`c` (continue): continue executing until the next breakpoint.
`s` (step): step into a function call.
`q` (quit): exit the debugger.
`p var` (print): print the value of a variable.
`l` (list): show the current line of code and surrounding lines.

step 5: use the commands provided by `pdb` to navigate through your code, inspect variables, and identify issues in your code.

by following these steps, you can effectively debug your python code from the command line using the `pdb` debugger.

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