包装函数的Python模块

Question

I am trying to write a generic module that provides functions that act as a wrapper to specific implementation. Example, my main.py script will call profile.py functions profile() . The profile.py will then call either machineA or machineB measure() function depending on the cmd line arg which i pass in.

/main.py

    tools/profile.py  -- # provides function profile

          machineA/measure.py  # provides function measure

          machineB/measure.py # provides function measure

Currently my tools/profile.py does this

if machine == 'machineA':
  from machineA import measure
else:
  from machineB import measure

def profile():
  return measure.measure()

I am using modules to do this functionality, I think there maybe a way to do this with classes, however i am not too familiar with classes to know how to get started. Any tips would be appreciated.

Answer 1

The simple (though hacky) way is to use __import__ directly.

measure = __import__(machine).measure

Slightly cleaner would be to use the importlib module.

import importlib
measure = importlib.import_module(machine).measure