import datetime
today = datetime.date.today()
first = today.replace(day=1)
lastMonth = first - datetime.timedelta(days=1)
str_last_month = lastMonth.strftime("%m-%Y")
print(str_last_month)
'05-2019'
where do you want LAN bugs today?

import datetime
today = datetime.date.today()
first = today.replace(day=1)
lastMonth = first - datetime.timedelta(days=1)
str_last_month = lastMonth.strftime("%m-%Y")
print(str_last_month)
'05-2019'