Parse the period string

import re import math import datetime period = period_str max_data_points = 1430 tt = re.search("(\d+)\s*d|(\d+)\s*day|(\d+)\s*days", period_str, re.IGNORECASE) if tt: days = tt.group(1) period = int(days) * 3600 *24 tt = re.search("(\d+)\s*h|(\d+)\s*hr|(\d+)\s*hrs|(\d+)\s*hour|(\d+)\s*hours", period_str, re.IGNORECASE) if tt: hours = tt.group(1) period = int(hours) * 3600 tt = re.search("(\d+)\s*m|(\d+)\s*min|(\d+)\s*mins|(\d+)\s*minute|(\d+)\s*minutes", period_str, re.IGNORECASE) if tt: minutes = tt.group(1) period = int(minutes) * 60 interval = 1 if math.ceil(period) <= 1440: interval = 1 elif math.ceil(period/5) <= 1440: interval = 5 elif math.ceil(period/10) <= 1440: interval = 10 elif math.ceil(period/30) <= 1440: interval = 30 else: interval = math.ceil(period/max_data_points) interval = 60*math.ceil(interval/60) interval = str(interval) now = datetime.datetime.now().timestamp() end_time = datetime.datetime.now().isoformat() then = now - period start_time = datetime.datetime.fromtimestamp(then).isoformat() print("Start time: ", start_time) print("End time: ", end_time) print("Interval: ", interval)