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Kindly help below my query:

I got an estimated time from API server like below: 2019-09-25T20:11:23+08:00

it seems like iso 8601 standard with timezone.

I would like to know how to calculate how many days, hours, minutes and seconds left from above value to the current time.

import datetime

Receved_time_frim_API = "2019-09-25T20:11:23+08:00"
Current_time = datetime.datetime.now()

left_days = 
left_hour =
left_min =
left_sec =
Hyo
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2 Answers2

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Okay first you need to parse the Receved_time_frim_API into datetime format:

from dateutil import parser
Receved_time_frim_API = parser.parse("2019-09-25T20:11:23+08:00")

But you can't just substract this from your Current_time, because datetime.now() is not aware of a timezone:

from datetime import timezone
Current_time = datetime.datetime.now().replace(tzinfo=timezone.utc)
print (Current_time-Receved_time_frim_API)

The result is a datetime.timedelta

michael
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Your time string contains timezone info. According to https://stackoverflow.com/a/13182163/12112986 it's easy to convert it to datetime object in python 3.7

import datetime
received = datetime.datetime.fromisoformat(Receved_time_frim_API)

In previous versions there is no easy oneliner to convert string with timezone to datetime object. If you're using earlier python version, you can try something crude, like

>>> date, timezone = Receved_time_frim_API.split("+")
>>> tz_hours, tz_minutes = timezone.split(":")
>>> date = datetime.datetime.strptime(date, "%Y-%m-%dT%H:%M:%S")
>>> date -= datetime.timedelta(hours=int(tz_hours))
>>> date -= datetime.timedelta(minutes=int(tz_minutes))

Note that this will work only in case of positive timezones

To substract two datetime objects use

td = date - Current_time
left_days = td.days
left_hour = td.seconds // 3600
left_min = (td.seconds//60)%60
left_sec = td.seconds % 60
Zbyszekkxy
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