CODEWITHSUNDEEP
pythonpdb
Chris W.
Chris W.

Reputation: 39219

How to examine returned value of currently debugging function in PDB?

When examining a function in pdb, I can run the r(eturn) command, which will continue to where the function returns.

How do I print (or otherwise examine) the value which will then be return?

Upvotes: 2

Views: 579

Answers (1)

PRMoureu
PRMoureu

Reputation: 13327

You can use the variable __return__ (no reference in the official doc, but you can find some details of the implementation in the source : user_return and do_retval)

def do_it():
    res = 'return me this'

    import pdb;
    pdb.set_trace()
    return res


then = do_it()


> debug_it.py(7)do_it()
-> return res
(Pdb) r
--Return--
> debug_it.py(7)do_it()->'return me this'
-> return res
(Pdb) __return__
'return me this'

(Another S.O post explains this variable)

Upvotes: 3

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