import calendar
import datetime
date_start = datetime.datetime(2015, 8, 1, 6, 0, 0)
a = calendar.monthrange(date_start.year, date_start.month)[1]
print(a)
aW1wb3J0IGNhbGVuZGFyCmltcG9ydCBkYXRldGltZQpkYXRlX3N0YXJ0ID0gZGF0ZXRpbWUuZGF0ZXRpbWUoMjAxNSwgOCwgMSwgNiwgMCwgMCkKYSA9IGNhbGVuZGFyLm1vbnRocmFuZ2UoZGF0ZV9zdGFydC55ZWFyLCBkYXRlX3N0YXJ0Lm1vbnRoKVsxXQpwcmludChhKQ==