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dateutil v2.8.1 Release Notes

Release Date: 2019-11-03 // over 4 years ago

🔖 Version 2.8.1 (2019-11-03)

⚡️ Data updates
- ⚡️ Updated tzdata version to 2019c.
🛠 Bugfixes
- 🛠 Fixed a race condition in the tzoffset and tzstr "strong"
  caches on Python 2.7. Reported by @kainjow (gh issue #901).
- 📜 Parsing errors will now raise ParserError, a subclass of
  ValueError, which has a nicer string representation. Patch by
  @gfyoung (gh pr #881).
- 📜 parser.parse will now raise TypeError when tzinfos is passed a
  type that cannot be interpreted as a time zone. Prior to this
  🔄 change, it would raise an UnboundLocalError instead. Patch by
  @jbrockmendel (gh pr #891).
- 🔄 Changed error message raised when when passing a bytes object as
  🛠 the time zone name to gettz in Python 3. Reported and fixed by
  @labrys () (gh issue #927, gh pr #935).
- 🔄 Changed compatibility logic to support a potential Python 4.0
  🚀 release. Patch by Hugo van Kemenade (gh pr #950).
- ⚡️ Updated many modules to use tz.UTC in favor of tz.tzutc()
  internally, to avoid an unnecessary function call. (gh pr #910).
- 🛠 Fixed issue where dateutil.tz was using a backported version of
  contextlib.nullcontext even in Python 3.7 due to a malformed
  import statement. (gh pr #963).
✅ Tests
- ✅ Switched from using assertWarns to using pytest.warns in the test
  suite. (gh pr #969).
- 🛠 Fix typo in setup.cfg causing PendingDeprecationWarning to not be
  ⚠ explicitly specified as an error in the warnings filter. (gh pr
  #966)
- Fixed issue where test_tzlocal_offset_equal would fail in certain
  environments (such as FreeBSD) due to an invalid assumption about
  🛠 what time zone names are provided. Reported and fixed by Kubilay
  Kocak (gh issue #918, pr #928).
- 🛠 Fixed a minor bug in test_isoparser related to bytes/str
  🛠 handling. Fixed by @fhuang5 (gh issue #776, gh pr #879).
- 🔧 Explicitly listed all markers used in the pytest configuration. (gh
  pr #915)
- ✅ Extensive improvements to the parser test suite, including the
  💅 adoption of pytest-style tests and the addition of parametrization
  ✅ of several test cases. Patches by @jbrockmendel (gh prs #735,
  #890, #892, #894).
- ➕ Added tests for tzinfos input types. Patch by @jbrockmendel (gh pr
  #891).
- 🛠 Fixed failure of test suite when changing the TZ variable is
  forbidden. Patch by @shadchin (gh pr #893).
- ✅ Pinned all test dependencies on Python 3.3. (gh prs #934, #962)
📚 Documentation changes
- 🛠 Fixed many misspellings, typos and styling errors in the comments
  📚 and documentation. Patch by Hugo van Kemenade (gh pr #952).
Misc
- ➕ Added Python 3.8 to the trove classifiers. (gh pr #970)
- 🚚 Moved as many keys from setup.py to setup.cfg as possible. Fixed
  by @FakeNameSE, @aquinlan82, @jachen20, and @gurgenz221 (gh
  issue #871, gh pr #880).
- 📜 Reorganized parser methods by functionality. Patch by
  @jbrockmendel (gh pr #882).
- 🚀 Switched release.py over to using pep517.build for creating
  🚀 releases, rather than direct invocations of setup.py. Fixed by
  @smeng10 (gh issue #869, gh pr #875).
- ➕ Added a "build" environment into the tox configuration, to handle
  🚀 dependency management when making releases. Fixed by @smeng10 (gh
  issue #870,r gh pr #876).
- GH #916, GH #971