2013-06-13 16:37:09 +08:00
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.. _python3-support:
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2013-06-09 19:42:24 +08:00
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Python 3 Support
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================
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2016-06-06 06:45:39 +08:00
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Flask, its dependencies, and most Flask extensions support Python 3.
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You should start using Python 3 for your next project,
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but there are a few things to be aware of.
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2013-06-09 19:42:24 +08:00
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2016-06-06 06:45:39 +08:00
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You need to use Python 3.3 or higher. 3.2 and older are *not* supported.
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2013-06-09 19:46:01 +08:00
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2016-06-06 06:45:39 +08:00
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You should use the latest versions of all Flask-related packages.
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Flask 0.10 and Werkzeug 0.9 were the first versions to introduce Python 3 support.
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2013-06-09 19:42:24 +08:00
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2016-06-06 06:45:39 +08:00
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Python 3 changed how unicode and bytes are handled,
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which complicated how low level code handles HTTP data.
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This mainly affects WSGI middleware interacting with the WSGI ``environ`` data.
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Werkzeug wraps that information in high-level helpers,
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so encoding issues should not effect you.
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2013-06-09 19:42:24 +08:00
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2016-06-06 06:45:39 +08:00
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The majority of the upgrade work is in the lower-level libraries like
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Flask and Werkzeug, not the high-level application code.
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For example, all of the examples in the Flask repository work on both Python 2 and 3
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and did not require a single line of code changed.
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