dep_inj_object.py

import lib

# A not-great example
class MyLessGoodClass:
  
    def do_something(self):
      x = lib.get_thing()
      return x + 1
    
    def do_another_thing(self):
      x = lib.get_thing()
      return x + 2
    
a_less_good_instance = MyLessGoodClass()
a_less_good_instance.do_something()
_less_good_instance.do_another_thing()

# An example showing better dependency injection
class MyBetterClass:
    
    __init__(self, thing_provider):
        self.thing_provider = thing_provider
    
    def do_something(self):
        x = self.thing_provider.get_thing()
        return x + 1
        
    def do_another_thing(self):
        x = self.thing_provider.get_thing()
        return x + 2
 
a_better_instance = MyBetterClass(thing_provider=lib)
a_better_instance.do_something()
a_better_instance.do_another_thing()