sdispater
`Exception 'NoneType' object has no attribute 'replace'` when parsing specific dates
- [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.
- Fedora 40:
- 3.0.0
Issue
An exception is raised when parsing specific date times.
Current date time on my machine, in case that is relevant.
>>> pendulum.now()
DateTime(2024, 8, 29, 16, 46, 14, 16970, tzinfo=Timezone('Europe/London'))
Example of the bad case:
>>> pendulum.parse('Tue, 02 Mar 2024 06:00:00 GMT', tz="UTC", strict=False)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/sam/flexget.venv/lib64/python3.12/site-packages/pendulum/parser.py", line 30, in parse
return _parse(text, **options)
^^^^^^^^^^^^^^^^^^^^^^^
File "/home/sam/flexget.venv/lib64/python3.12/site-packages/pendulum/parser.py", line 46, in _parse
return pendulum.datetime(
^^^^^^^^^^^^^^^^^^
File "/home/sam/flexget.venv/lib64/python3.12/site-packages/pendulum/__init__.py", line 143, in datetime
return DateTime.create(
^^^^^^^^^^^^^^^^
File "/home/sam/flexget.venv/lib64/python3.12/site-packages/pendulum/datetime.py", line 103, in create
tz = pendulum._safe_timezone(tz)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/sam/flexget.venv/lib64/python3.12/site-packages/pendulum/__init__.py", line 112, in _safe_timezone
elif obj.tzname(None) == "UTC":
^^^^^^^^^^^^^^^^
File "/home/sam/flexget.venv/lib64/python3.12/site-packages/dateutil/tz/tz.py", line 238, in tzname
return self._tznames[self._isdst(dt)]
^^^^^^^^^^^^^^^
File "/home/sam/flexget.venv/lib64/python3.12/site-packages/dateutil/tz/tz.py", line 291, in _isdst
dstval = self._naive_is_dst(dt)
^^^^^^^^^^^^^^^^^^^^^^
File "/home/sam/flexget.venv/lib64/python3.12/site-packages/dateutil/tz/tz.py", line 259, in _naive_is_dst
timestamp = _datetime_to_timestamp(dt)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/sam/flexget.venv/lib64/python3.12/site-packages/dateutil/tz/tz.py", line 1814, in _datetime_to_timestamp
return (dt.replace(tzinfo=None) - EPOCH).total_seconds()
^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'replace'
Example of the good case:
>>> pendulum.parse('Tue, 02 Apr 2024 06:00:00 GMT', tz="UTC", strict=False)
DateTime(2024, 4, 2, 6, 0, 0, tzinfo=Timezone('UTC'))
This is affecting Flexget rss plugin, see: https://github.com/Flexget/Flexget/issues/4036
I have tried to replicate the error using the same date and timezone configuration (Europe/London) in a Windows environment:
Operating System: Windows 11 Python: 3.9 Pendulum: 3.0.0 Date and time used: DateTime(2024, 8, 29, 16, 46, 14, 16970, tzinfo=Timezone('Europe/London')) Parsing result: 2024-03-02 06:00:00+00:00 without any errors.
This suggests that the issue might be specific to the Fedora 40 environment or related to differences in dependency configurations on that operating system.
Thanks for confirming. Let me get a full ouptut of all package versions used in the venv and we can compare what is different. Here's output of pip3 freeze in the venv where I can reproduce this:
pendulum @ file:///home/sam/src/pendulum
python-dateutil==2.9.0.post0
six==1.16.0
time-machine==2.15.0
tzdata==2024.1
edit: I should also note the exact python version, which is this:
Name : python3
Version : 3.12.5
Release : 1.fc40
It could also be a difference between Python 3.9 and Python 3.12 based on your results
Note that the TZ environment variable has an impact here. On debian bookworm I see the following:
root@48ff42b03f9d:/# unset TZ
root@48ff42b03f9d:/# python3 -c 'import pendulum; print(pendulum.parse("Tue, 02 Mar 2024 06:00:00 GMT", tz="UTC", strict=False))'
2024-03-02 06:00:00+00:00
root@48ff42b03f9d:/# TZ="UTC" python3 -c 'import pendulum; print(pendulum.parse("Tue, 02 Mar 2024 06:00:00 GMT", tz="UTC", strict=False))'
2024-03-02 06:00:00+00:00
root@48ff42b03f9d:/# TZ="Europe/London" python3 -c 'import pendulum; print(pendulum.parse("Tue, 02 Mar 2024 06:00:00 GMT", tz="UTC", strict=False))'
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/usr/local/lib/python3.11/dist-packages/pendulum/parser.py", line 30, in parse
return _parse(text, **options)
^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/pendulum/parser.py", line 46, in _parse
return pendulum.datetime(
^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/pendulum/__init__.py", line 143, in datetime
return DateTime.create(
^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/pendulum/datetime.py", line 103, in create
tz = pendulum._safe_timezone(tz)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/pendulum/__init__.py", line 112, in _safe_timezone
elif obj.tzname(None) == "UTC":
^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/dateutil/tz/tz.py", line 238, in tzname
return self._tznames[self._isdst(dt)]
^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/dateutil/tz/tz.py", line 291, in _isdst
dstval = self._naive_is_dst(dt)
^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/dateutil/tz/tz.py", line 259, in _naive_is_dst
timestamp = _datetime_to_timestamp(dt)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/dateutil/tz/tz.py", line 1814, in _datetime_to_timestamp
return (dt.replace(tzinfo=None) - EPOCH).total_seconds()
^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'replace'
