AttributeError when deepcopying object using structlog

[stefanbschneider]

I really like structlog and have been using it in my classes like this:

class Test:
    def __init__(self, id, works=True):
        self.id = id
        self.works = works
        self.log = structlog.get_logger(id=self.id)

    def example(self):
        self.log.info('Works')

This way I have separate loggers for different objects to which I can bind different attributes (here id). And it used to work fine.

Now, I need to deepcopy my objects and it breaks:

test = Test(1)
copied_test = deepcopy(test)

This fails with the following error: AttributeError: 'PrintLogger' object has no attribute '__deepcopy__'

Is there some other best practice how to use structlog with classes and objects? Or some way to fix the problem?

This seems related to #126 and #71.
I have structlog 20.1.0 with Python 3.8 on Ubuntu 20.04 (on WSL on Win 10).

[hynek]

Yeah I suppose we'll have to implement an __deepcopy__ analogously to the pickle code.

[stefanbschneider]

Any way I can help with this?

[hynek]

You could submit a PR that does it? 😇 Shouldn't be too complicated, I think.

The bigger problem will probably be to hunt down all classes that need this treatment. 🤔

[stefanbschneider]

Hm, fixing PrintLogger worked, but I still get errors: #270 Do you have any idea what the cause could be?