A whole new year

last_month.py

import datetime as dt

def last_month():
    last_eom = dt.date.today().replace(day=1) - dt.timedelta(days=1)
    to_date = last_eom + dt.timedelta(days=1)
    from_date = last_eom.replace(day=1)
    return from_date, to_date

# >>> print(dt.date.today())
# 2017-01-18
# >>> fdate, tdate = last_month()
# >>> print(fdate)
# 2016-12-01
# >>> print(tdate)
# 2017-01-01