Borg Design Pattern

I am trying to learn design patterns in Python. The recommended approach for implementing global variables is through the Borg pattern.

class Borg:
    __shared_state = {}
    def __init__(self):
        self.__dict__ = self.__shared_state

This seems to be a dictionary. How would I store more complicated data structures, say a Pandas dataframe or a custom class, to be used by globally? I would appreciate any guidance.