title: convert string 'GMT+5:30' to Time Zone (like Aisa/Kolkata) without checking datetime.datetime.now() in python
body: <p>convert string 'GMT+5:30' to Time Zone (like Aisa/Kolkata) without checking datetime.datetime.now() in python</p>
  
  <pre><code>now = datetime.datetime.astimezone(Time_Zone).tzname()  # current time
  print(now)
  print(type(now))
  utc_offset = datetime.timedelta(hours=5, minutes=30)  # +5:30
  print(utc_offset)
  for tz in map(pytz.timezone, pytz.all_timezones_set):
      if (now.astimezone(tz).utcoffset() == utc_offset):
          print(tz.zone)
  </code></pre>