Is there a library or package which we can use with python to connect to salesforce and get data?
I use beatbox
Example to query for a lead by email address
import beatbox
sf_username = "Username"
sf_password = "password"
sf_api_token = "api token"
def get_lead_records_by_email(email)
sf_client = beatbox.PythonClient()
password = str("%s%s" % (sf_password, sf_api_token))
sf_client.login(sf_username, password)
lead_qry = "SELECT id, Email, FirstName, LastName, OwnerId FROM Lead WHERE Email = '%s'" % (email)
records = sf_client.query(lead_qry)
return records
To get other data look at the salesforce api docs
view other beatbox examples here