Python – How to compare ISO-8601 dates in python

I have a date in ISO-8601 format

date="2018-03-13T17:22:20.065Z"

I want to find the current UTC time in iso9621 format.
I found some code snippets like datetime.datetime.utcnow().isoformat().

This gives us the following results

2018-06-12T08:19:28.954375

I would like to know if the date provided is older than 30 days.

I tried to solve it as shown in the image
question

import datetime
import dateutil.parser

insertion_date = dateutil.parser.parse('2018-03-13T17:22:20.065Z')
diffretiation=datetime.datetime.utcnow().isoformat() - insertion_date

print diffretiation 
print insertion_date

if diffretiation.days>30:
    print "The insertion date is older than 30 days"

else:
    print "The insertion date is not older than 30 days"

I found the following error here

Traceback (most recent call last):
  File "test2.py", line 5, in <module>
    right_now_30_days_ago=datetime.datetime.utcnow().isoformat() - insertion_date
TypeError: unsupported operand type(s) for -: 'str' and 'datetime.datetime'

It would be great to have any help here

Your datetime.datetime.utcnow() is time zone unknown, use pytz to let it know:

import datetime
import dateutil.parser
import pytz

insertion_date = dateutil.parser.parse('2018-03-13T17:22:20.065Z')
diffretiation = pytz.utc.localize(datetime.datetime.utcnow()) - insertion_date

print diffretiation 
print insertion_date

if diffretiation.days>30:
    print "The insertion date is older than 30 days"

else:
    print "The insertion date is not older than 30 days"
#The insertion date is older than 30 days

P.S. datetime.datetime.utcnow().isoformat() returns a string, and that’s the error you’re experiencing.