[issue46761] functools.update_wrapper breaks the signature of functools.partial objects

[Graham Dumpleton]

Graham Dumpleton <Graham.Dumpleton at gmail.com> added the comment:

It is Django I would worry about and look at closely as they do stuff with decorators on instance methods that uses partials.

https://github.com/django/django/blob/7119f40c9881666b6f9b5cf7df09ee1d21cc8344/django/utils/decorators.py#L43

```
    def _wrapper(self, *args, **kwargs):
        # bound_method has the signature that 'decorator' expects i.e. no
        # 'self' argument, but it's a closure over self so it can call
        # 'func'. Also, wrap method.__get__() in a function because new
        # attributes can't be set on bound method objects, only on functions.
        bound_method = wraps(method)(partial(method.__get__(self, type(self))))
        for dec in decorators:
            bound_method = dec(bound_method)
        return bound_method(*args, **kwargs)
```

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue46761>
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