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Python venv: How To Create, Activate, Deactivate, And Delete

Python2と3の主な違い 「Python2にしか対応してないライブラリがある」と述べた通り、2つのバージョンには様々な違いがあります。 この先では、 Python2と3の変更点

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Python 2.7.9 includes several significant changes unprecedented in a „bugfix“ release: The entirety of Python 3.4’s ssl module has been backported for Python 2.7.9.