@click.group()
def cli():
    pass
Connect to the DB using Psycopg2, if conn_str is not provided, then it is read from .pymadlib.config file
dataset/ETHPy150Open learntextvis/textkit/textkit/cli.py/cli--crossover with--dataset/ETHPy150Open pivotalsoftware/pymadlib/pymadlib/pymadlib.py/DBConnect.__init__