在python中的模块之间传递对象的最合适方法是什么？

Question

I have to access an object in a module from another module:

module_1.py:

import module_2

class A():
    def __init__():
         do_sth()

class B():
    def __init__():
         do_sth()
         self.x = some_object()
         do_sth_else(x)

    def show():
        show_gui()

def start():
    y = B()
    y.show()

if __name__ == "__main__":
    start()

module_2.py:

def run_it(arg):
    run_run_run()

I need self.x object from module_1 so that I can pass it as an argument to run_it() function in module_2 . Note that module_1 also imports module_2 .

Is there a conventional method to access objects in other modules?

Answer 1

Now with your corrections, it looks like you want something like this:

from module_1 import B

run_it(B().x)

Which raises a question: If x is the same for all objects of B , why not make it a class member instead of an instance member. Something like:

class B:
    x = some_object()

    def __init__(self):
         do_sth()
         do_sth_else(B.x)

    def show(self):
        show_gui()

And in the other module

run_it(B.x)

---

Addressing your comment: y is local to start . You will need to return it:

def start():
    y = B()
    y.show()
    return y

And then

run_it(start())

---

Also y.show() will fail horribly as show doesn't accept parameters and will get passed y as self .