Python gets the date of the last day of the previous month

[Python] Code     

from datetime import datetime
from datetime import timedelta
import calendar
def getLastDayOfLastMonth():
d = datetime.now()
c = calendar.Calendar()
year = d.year
month = d.month
if month == 1 :
month = 12
year -= 1
else :
month -= 1
days = calendar.monthrange(year, month)[1]
return (datetime(year,month,1)+timedelta(days= days)).strftime('%Y-%m-%d %X')