utc_ist.py

from datetime import datetime
import pytz

date_str = "2019-10-22T10:45:35Z"
utc_datetime_obj = pytz.utc.localize(datetime.strptime(date_str, "%Y-%m-%dT%H:%M:%SZ"))
ist_datetime_obj = utc_datetime_obj.astimezone(pytz.timezone("Asia/Kolkata"))\
    # .strftime("%Y-%m-%d %H:%M:%S")

# print(type(datetime_obj))
# datetime_obj_utc = datetime_obj.replace(tzinfo=timezone('UTC'))
# print(datetime_obj_utc.strftime("%Y-%m-%d %H:%M:%S"))

print(utc_datetime_obj)
print(ist_datetime_obj)