Strange strptime error in python 3.5 and 3.6

Question

The following code

from datetime import datetime
dt = '2019-07-21T08:54:32.115285+00:00'
datetime.strptime(dt, '%Y-%m-%dT%H:%M:%S.%f%z')

throws the following exception in Python 3.5.3 and 3.6.8

ValueError: time data '2019-07-21T08:54:32.115285+00:00' does not match format '%Y-%m-%dT%H:%M:%S.%f%z'

but works fine in Python 3.7.3.

I checked the 3.5 documentation but couldn't spot any changes. Any ideas?

Answer 1

The %z directive only allows for a colon in the time zone starting with python 3.7.

See also here