How to avoid computation every time a python module is reloaded

Question

I have a python module that makes use of a huge dictionary global variable, currently I put the computation code in the top section, every first time import or reload of the mod

Answer 1

Calculate your global var on the first use.

class Proxy:
    @property
    def global_name(self):
        # calculate your global var here, enable cache if needed
        ...

_proxy_object = Proxy()
GLOBAL_NAME = _proxy_object.global_name

Or better yet, access necessery data via special data object.

class Data:
    GLOBAL_NAME = property(...)

data = Data()

Example:

from some_module import data

print(data.GLOBAL_NAME)

See Django settings.