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python - How can I pass configuration variable values into the pyodbc connect command?

I have a .ini (configuration file) where I have mentioned the server name, Database Name, UserName and Password with which I can connect my app to the MSSQL

self.db = pyodbc.connect(
    'driver={SQL Server};server=homeserver;database=testdb;uid=home;pwd=1234')`

corresponding data mentioned above connect statement is now in config.ini

self.configwrite = ConfigParser.RawConfigParser()
configread = SafeConfigParser()
configread.read('config.ini')

driver = configread.get('DataBase Settings','Driver')
server = str(configread.get('DataBase Settings','Server'))
db = str(configread.get('DataBase Settings','Database'))
user = str(configread.get('DataBase Settings','Username'))
password = str(configread.get('DataBase Settings','Password'))'

How can I pass these variables in the pyodbc connect statement?

I tried this:

self.db = pyodbc.connect('driver={Driver};server=server;database=db;uid=user;pwd=password')

But I am getting an error.

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Other options for the connect function:

# using keywords for SQL Server authentication
self.db = pyodbc.connect(driver=driver, server=server, database=db,
                         user=user, password=password)

# using keywords for Windows authentication
self.db = pyodbc.connect(driver=driver, server=server, database=db,
                         trusted_connection='yes')    

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