from sqlalchemy import create_engine
import pandas pd

def _get_hm_eng():
    """Return the engine for the HM db"""
    hm_db_type = 'postgresql'
    hm_user = ''
    hm_pass = ''
    hm_address = ''
    return create_engine('{}://{}:{}@{}'.format(hm_db_type,
                                                hm_user,
                                                hm_pass,
                                                hm_address))

eng = _get_hm_eng()
df = pd.read_sql_query(qry, eng)