How to save variables on a file

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1

hi, every time I restart the program I loose all the variables related to a user (i.e. user_data[user_id] { var 1, var 2,…} ) that have been created and updated along the telegram bot experience the first time the user connect to the bot. I want to save this variables on a file and load them when I restart the program (after an update or a crash for example) when the user_id reconnects to the bot. Is it possible?

2

You could use pickle

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3

Below are examples of pickling, saving, and retrieving data. You can of course modify the data after retrieval, then pickle and save it again.

Pickling and saving:

import pickle

oaks = {'White Oak' : 'Quercus alba',
        'Black Oak': 'Quercus velutina',
        'Gambel Oak': 'Quercus gambelii'}   

# pickle and save in a file
with open('oak_data_file.pkl', 'wb') as outf:
    pickle.dump(oaks, outf) 

print("pickled and saved!")

Retrieving the pickled data:

import pickle

# load the pickled data
with open('oak_data_file.pkl', 'rb') as inf: 
    in_data = pickle.load(inf) 
    print(in_data)

Output:

{'White Oak': 'Quercus alba', 'Black Oak': 'Quercus velutina', 'Gambel Oak': 'Quercus gambelii'}
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