Explicitly export values on factory namespace

[DavidCain]

Now that factory-boy exports its types, mypy will fail in strict mode
if using the factory namespace. Specifically, --no-implicit-reexport
flags references to factory.Factory (and other similar values) as
being implicitly exported:

$ mypy --strict test.py
test.py:1:1: error: Module "factory" does not explicitly export attribute "Factory"  [attr-defined]
    from factory import Factory
    ^

We can instead explicitly export these objects. As a benefit, anybody
who uses the ill-advised from factory import * will now at least no
longer have __author__ and such pollute their namespace.

https://mypy.readthedocs.io/en/stable/config_file.html#confval-implicit_reexport

[samuelhwilliams]

Just a mild bump that this feels like a useful thing to get in 🙇

[DavidCain]

@rbarrois - any thoughts about this proposed change?

[sshishov]

@rbarrois can we have it merged? Everyone was using namespaces as factory...

[trogers8080]

This would be really nice to get merged. It seems like a fairly low risk change since it only updates the __all__ of the top level factory module but it will take care of a lot of false positive import errors from type checkers.