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- contextlib2 is a backport of the `standard library's contextlib
- module <https://docs.python.org/3.5/library/contextlib.html>`_ to
- earlier Python versions.
- It also serves as a real world proving ground for possible future
- enhancements to the standard library version.
- Development
- -----------
- contextlib2 has no runtime dependencies, but requires ``unittest2`` for testing
- on Python 2.x, as well as ``setuptools`` and ``wheel`` to generate universal
- wheel archives.
- Local testing is just a matter of running ``python test_contextlib2.py``.
- You can test against multiple versions of Python with
- `tox <https://tox.testrun.org/>`_::
- pip install tox
- tox
- Versions currently tested in both tox and Travis CI are:
- * CPython 2.6
- * CPython 2.7
- * CPython 3.4
- * CPython 3.5
- * CPython 3.6
- * CPython 3.7 (CPython development branch)
- * PyPy
- Versions currently tested only in tox are:
- * PyPy3
- This is due to an exception chaining compatibility bug that was fixed in
- the PyPy3 5.5 alpha release, while the version on Travis CI (as of April 2017)
- is still the older PyPy3 2.4.0 release.
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