How to use the 'debug' command inside pdb (python)

Question

I would like to know how to use the debug command in pdb?

(Pdb) help

Documented commands (type help <topic>):
========================================
EOF    c          d        h         list      q        rv       undisplay
a      cl         debug    help      ll        quit     s        unt
alias  clear      disable  ignore    longlist  r        source   until
args   commands   display  interact  n         restart  step     up
b      condition  down     j         next      return   tbreak   w
break  cont       enable   jump      p         retval   u        whatis
bt     continue   exit     l         pp        run      unalias  where

Miscellaneous help topics:
==========================
pdb  exec
(Pdb) help debug
debug code
        Enter a recursive debugger that steps through the code
        argument (which is an arbitrary expression or statement to be
        executed in the current environment).
(Pdb) debug print('hello')
ENTERING RECURSIVE DEBUGGER
> <string>(1)<module>()->None
((Pdb)) n
hello
--Return--
> <string>(1)<module>()->None
((Pdb)) n
LEAVING RECURSIVE DEBUGGER
(Pdb)

ssfdust · Accepted Answer · 2020-11-20 01:23:57Z

3

The question confused me years. I always forgot to search the final answer. But today I get it, and share what I find here.

How can I debug manually typed expression and statements in pdb?

When you are in the recursive debug mode first time, type s , you will kwon what to do the next.

answered Nov 20, 2020 at 1:23

ssfdust

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1 Comment

Papouche Guinslyzinho Over a year ago

Finally I understand the purpose and how to use this option! Thanks!

Shaon shaonty · Accepted Answer · 2017-07-07 15:23:12Z

-1

Let, you have a bunch of code. You put pdb, say line 3.

In this case, when you run the program, line 1 and line 2 is executed automatically and you can see the result by putting the variable name and from line 4 is not executed.

If you wanna see after line 3 result you have to write code which results you want to see or you can go next line using n, and c for continuing that means exit from debugging mode.

answered Jul 7, 2017 at 15:23

Shaon shaonty

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1 Comment

Papouche Guinslyzinho Over a year ago

Thanks @Shaon but I do understand how to debug with Python but there is one command debug (see help command) that I don't understand. Do you have an example of how to use the debug command

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