在python中实例化模块时如何将模块导入类？

Question

I have a class "ClassX". In it are multiple function definitions, each of which use the same module in different ways. Let's say that the module being imported is "ModuleY". When i instantiate this class, how do i make it import this module in a way that can be accessed by all of ClassX's functions? Ie would i import it like this:

class ClassX():
   def __init__(self):
      import ModuleY

Like this:

class ClassX():
   import ModuleY
   def __init(self):
      #do something

or would i have to import the module for every function call:

class ClassX():
   def __init__(self):
      #do something#
   def functionA(self):
      import ModuleY
      #do something
   def functionB(self):
      import ModuleY
      #do something

Answer 1

Just import ModuleY as normal and then refer to the functions within ModuleY as necessary in other parts of your script.

ModuleY.py

def do_something():
    print("something")


main.py 

import ModuleY

class ClassX():
    def __init__(self):
      # do_something()
      # prints "something"