通过导入Python全局变量？

Question

Is this form of global variable declaration good practice in Python? My dictionary has no data in B.py in some cases. Just seems inconsistent.

classes.py

class Aclass:
    dict = {}

myClass = Aclass()

A.py:

from classes import myClass

myClass.dict["variable"]

B.py:

from classes import myClass

print str(myClass.dict)

A.py is processed before B.py. This prints an empty dict {} for me.

This is a simplified question from previous post: Shared/Global Dictionary in Django Between URLs and Context Processor . Your insight is appreciated.

Answer 1

if in A.py you change it to

myClass.dict["variable"]="hello"

(as pointed out in comments)

then the question becomes interesting.

it's ok but it's better to have another interface (functions, methods) to that data. It's a way to store a state of the module. The object you called myClass (!) is the same both from a and b.

multiple imports are safe and do nothing except to return the same loaded module.