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Raising FireError in __init__ is not handled properly #250

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mnowotnik opened this issue Apr 26, 2020 · 4 comments · May be fixed by #361
Open

Raising FireError in __init__ is not handled properly #250

mnowotnik opened this issue Apr 26, 2020 · 4 comments · May be fixed by #361

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@mnowotnik
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In version 0.3.1 when user attempts to raise error in the __init__ method the effective error that gets printed is about missing self argument. Minimal example:

import fire
from fire.core import FireError
class Calc:

    def __init__(self):
        raise FireError('foo')

    def add(self):
        pass


if __name__ == "__main__":
    fire.Fire(Calc)

python calc.py add
ERROR: The function received no value for the required argument: self

When executed interactively, the error is correct:

>>>import calc; import fire
>>>fire.Fire(calc.Calc)
ERROR: foo
@fegerar
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fegerar commented May 3, 2020

I've the same error with the same version. I'm trying to debug core.py because the problem is in this file. I'll let you know if I found something.

@fegerar
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fegerar commented May 4, 2020

Today I've tried to create something like a filter in the _ParseArgs() function (core.py). This filter check if there is the keyword "self" in fn_args and the component is a class, so it remove "self" from fn_args and append it to fn_defaults (to do this I've converted fn_defaults to a list, I've appended "self" and I've reconverted it in a tuple), but this doesn't work. Tomorrow I'll try to find other solutions.

@dbieber
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dbieber commented May 4, 2020

@joejoevictor is also taking a look at this

@aksg87
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aksg87 commented Sep 23, 2021

Any updates on this issue? cc: @joejoevictor

@Rohan-Salwan Rohan-Salwan linked a pull request Dec 2, 2021 that will close this issue
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Fix Raising FireError in __init__ is not handled properly Rohan-Salwan/python-fire
4 participants
@dbieber @mnowotnik @aksg87 @fegerar