Is it possible to create a DB connection in all Python Telegram Bot files?

Question

Python

Hello!

I have been studying Python not so long ago, the question has arisen ...

Is it possible to create a connection to the database (MySQL) in all Python Telegram Bot files? (In this case, in three files)

I'm currently struggling with this:
pymysql.err.OperationalError: (2013, 'Lost connection to MySQL server during query') I'm struggling

like this:

# if the connection was lost, then it reconnects
db.ping(reconnect=True)
db.query('SET GLOBAL connect_timeout=86000')

if db.open is False:
    max_try = 15
    tryt = 0
    while db.open is False:
        if tryt < max_try:
            db.ping() # autoreconnect is true by default
        tryt +=1

db = pymysql.connect(host='localhost', ... connection itself.
And like this in three files.

Thanks for any help, hint!