'local' zone cannot be copied

[tbabej]

If you try to copy the 'local' zone object, or any object that contains it, you get the following failure:

>>> tzlocal.get_localzone()
<DstTzInfo 'local' PMT+0:58:00 STD>
>>> zone = tzlocal.get_localzone()
>>> import copy
>>> copy.deepcopy(zone)                                                                            
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.7/copy.py", line 190, in deepcopy
    y = _reconstruct(x, rv, 1, memo)
  File "/usr/lib64/python2.7/copy.py", line 329, in _reconstruct
    y = callable(*args)
  File "/usr/lib/python2.7/site-packages/pytz/__init__.py", line 286, in _p
    return unpickler(*args)
  File "/usr/lib/python2.7/site-packages/pytz/tzinfo.py", line 524, in unpickler
    tz = pytz.timezone(zone)
  File "/usr/lib/python2.7/site-packages/pytz/__init__.py", line 180, in timezone
    raise UnknownTimeZoneError(zone)
pytz.exceptions.UnknownTimeZoneError: 'local'

[regebro]

I guess that should be fixable. But quick question: Why do you need to copy it?

[tbabej]

Oh, I hinted that in the description. Localized datetime is a attribute of a object which is being copied. The above is just a minimal example.

[regebro]

In fact, this is not trivially fixable, because of how pytz works.

However, systemd distributions will now no longer return the "local" zone, so it should be less of a problem.

[tbabej]

I feared as much - could not find a trivial solution myself before reporting. I agree it shouldn't make much trouble as 'local' timezone should be encountered much less frequently.

Thanks for taking the time to investigate!