Removing Python 2.x support from Django for version 2.0

Re:Removing Python 2.x support from Django for version 2.0 by nodamage on Thursday January 19, 2017 @06:08AM (#13434828)

I'm fairly sure I'm handling strings correctly under Python 2. What I'm not sure of is the risk of something breaking if I upgrade to Python 3, especially when it comes to upgrading external dependencies. Even if it's just non-backwards compatible API changes, it's more risk to deal with.

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Re:Removing Python 2.x support from Django for version 2.0 by rtpg on Thursday January 19, 2017 @07:55AM (#13435353)

You're fairly certain, but with Python 3 you can be completely certain. That's the magic of it.

Python 2 will allow this to sometimes work, Python 3 will make sure this never works, because there's a bytes/text mismatch. It's nice to rule out entire classes of bugs like this

    from sys import argv
    import json
    with open(argv[1], 'rb') as f:
        json.loads(f.read())

Porting is still difficult. But when we ported from Py2 to Py3, we found a couple issues like this (despite dealing with weird encodings all the time).

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Re:Removing Python 2.x support from Django for version 2.0 by lima on Thursday January 19, 2017 @10:18AM (#13436398)

Exactly this. When I ported my stuff to Python 3, I fixed many encoding bugs in the process.

You can do this correctly in Python 2, it's just much harder.

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Re:Removing Python 2.x support from Django for version 2.0 by criddell on Thursday January 19, 2017 @08:50AM (#13435707)

Do you think you will ever have to move to Python 3?

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Re:Removing Python 2.x support from Django for version 2.0 by nodamage on Thursday January 19, 2017 @04:16PM (#13439572)

I don't know. I will probably try to by 2020 once it gets officially EOLed. Until then I have plenty of other work to do.

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Re:Removing Python 2.x support from Django for version 2.0 by mkesper on Thursday January 19, 2017 @07:08AM (#13435117)

Isn't that what test bases are for?

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Re:Removing Python 2.x support from Django for version 2.0 by nodamage on Thursday January 19, 2017 @04:15PM (#13439566)

Tests will tell you something broke, you still have to go through the work of figuring out why and how to fix it.

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