Retrieve module object from stack frame

Answer 1

import inspect
def callers_module():
   module = inspect.getmodule(inspect.currentframe().f_back)
   return module

Answer 2

While inspect.getmodule works great, and I was indeed looking in the wrong place to find it, I found a slightly better solution for me:

def callers_module():
  module_name = inspect.currentframe().f_back.f_globals["__name__"]
  return sys.modules[module_name]

It still uses inspect.currentframe (which I prefer over the exactly identical sys._getframe), but doesn't invoke inspect's module-filename mapping (in inspect.getmodule).

Additionally, this question inspired an interesting way to manage __all__:

from export import export

@export
class Example: pass

@export
def example: pass

answer = 42
export.name("answer")

assert __all__ == ["Example", "example", "answer"]