AttributeError: 'NoneType' object has no attribute 'convert' with ZoneInfo

[taosharma]

• [x] I am on the latest Pendulum version.
• [x] I have searched the issues of this repo and believe that this is not a duplicate.

• OS version and name: 4.19.128-microsoft-standard Linux
• Pendulum version: 2.1.2

Issue

Reproducible example

import pendulum
from zoneinfo import ZoneInfo

tz = ZoneInfo("Europe/London")
my_datetime = pendulum.now()

my_datetime.astimezone(tz)  # AttributeError: 'NoneType' object has no attribute 'convert'

Description

The above error seems to be thrown when calling pendulum.astimezone() with a ZoneInfo timezone. We are in the process of migrating a project from pytz to zoneinfo. The above example works perfectly if pendulum is replaced with datetime.datetime.

Thanks for reading and looking into this!

Expected behaviour

For pendulum.astimezone() to successfully convert a datetime object with a ZoneInfo timezone.

Stack trace

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Input In [6], in <cell line: 1>()
----> 1 my_datetime.astimezone(tz)

File ~/.cache/pypoetry/virtualenvs/vidacycle_webapps-foslGWoH-py3.9/lib/python3.9/site-packages/pendulum/datetime.py:1467, in DateTime.astimezone(self, tz)
   1466 def astimezone(self, tz=None):
-> 1467     return pendulum.instance(super(DateTime, self).astimezone(tz))

File ~/.cache/pypoetry/virtualenvs/vidacycle_webapps-foslGWoH-py3.9/lib/python3.9/site-packages/pendulum/datetime.py:1443, in DateTime.__add__(self, other)
   1440 if not isinstance(other, datetime.timedelta):
   1441     return NotImplemented
-> 1443 return self._add_timedelta_(other)

File ~/.cache/pypoetry/virtualenvs/vidacycle_webapps-foslGWoH-py3.9/lib/python3.9/site-packages/pendulum/datetime.py:760, in DateTime._add_timedelta_(self, delta)
    755 elif isinstance(delta, pendulum.Duration):
    756     return self.add(
    757         years=delta.years, months=delta.months, seconds=delta._total
    758     )
--> 760 return self.add(seconds=delta.total_seconds())

File ~/.cache/pypoetry/virtualenvs/vidacycle_webapps-foslGWoH-py3.9/lib/python3.9/site-packages/pendulum/datetime.py:667, in DateTime.add(self, years, months, weeks, days, hours, minutes, seconds, microseconds)
    645     return pendulum.datetime(
    646         dt.year,
    647         dt.month,
   (...)
    653         tz=self.tz,
    654     )
    656 dt = self.__class__(
    657     dt.year,
    658     dt.month,
   (...)
    664     tzinfo=UTC,
    665 )
--> 667 dt = self.tz.convert(dt)
    669 return self.__class__(
    670     dt.year,
    671     dt.month,
   (...)
    678     fold=dt.fold,
    679 )

AttributeError: 'NoneType' object has no attribute 'convert'

[thinkwelltwd]

I stubbed by toes hard on this bug, and here it's been fixed for 8 months. Would be supremely grateful for a new release. :bowing_man:

[muhamadBrew]

this happens also when upgrading Django 3.x to 4.x since Django 4.x is using zoneinfo as default timezone implementation. just following this to know when its fixed