from aspen_pyconnect import IP21Connector

aspen = IP21Connector(server='SERVER_NAME', user='DOMAIN\USERNAME', pw='PASSWORD')
aspen.connect()

import pandas as pd
from datetime import datetime

data = aspen.history(
    start_time=datetime(2020, 1, 1),
    end_time=datetime.now(),
    name='TAG_NAME',
    period='01:00:00',
    stepped=0
)
df = pd.DataFrame(data)