Codes

get day of year from year,month,day,...

datetime.datetime(year,month,day,0,0,0).strftime('%j')

day of year to date

d=datetime.date(int(start_year), 1, 1) + datetime.timedelta(int(dataset[1][9:12]) - 1)
start_year = d.year
start_month = d.month
start_day = d.day

datetime to timestamp

time.mktime(datetime.datetime(start_year, start_month, start_day, 0, 0, 0).timetuple())

timestamp to datetime

datetime.datetime.fromtimestamp(time.time() - 24*60*60*i)

current date as string

datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")

convert date format to timestamp

cur_ts = time.mktime(datetime.datetime.strptime(keys[i], "%Y-%m-%d").timetuple())

decode string with hex characters

str.decode('string_escape')