How to debug a program in python

If you only use print to locate python program problems, then this article is written for you. This article will get you started with the python debugger.

The Python standard library provides a debugger called pdb, which provides most of the common functions required for debugging, such as breakpoints and single-line stepping. , Inspection of stack frame data, etc. Understanding some basic usage and knowledge of python pdb will greatly improve our development skills and efficiency and save time in troubleshooting bugs.

Now we use pdb to debug the following simple python program to demonstrate the basic usage of pdb. (Recommended learning: Python video tutorial)

Run the pdb debugger

Add "-m pdb" to the command line parameters of the python interpreter to start the pdb debugger to debug the application, as follows:

In addition, You can also start the debugger by setting breakpoints in the program. First import the pdb module and call the set_trace function to set a breakpoint where you need to pause.

Directly execute the program with a breakpoint added, and the program will automatically pause at the breakpoint.

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