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From: Mark Lawrence <breamoreboy@yahoo.co.uk>
Subject: Re: Python 2 to 3 conversion - embrace the pain
Date: Mon, 16 Mar 2015 18:14:14 +0000
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Xref: csiph.com comp.lang.python:87580

On 16/03/2015 17:47, Terry Reedy wrote:
> On 3/16/2015 5:13 AM, INADA Naoki wrote:
>
>> Another experience is porting Flask application in my company from
>> Python 2 to Python 3.
>> It has 26k lines of code and 7.6k lines of tests.
>>
>> Since we don't need to support both of PY2 and PY3, we used 2to3.
>> 2to3 changes 740 lines.
>
> That is less than 3% of the lines.  Were any changes incorrect?  How
> many lines *not* flagged by 2to3 needed change?
>
>> I had to replace google-api-client with
>> requests+oauthlib since
>> it had not supported PY3 yet.
>
> Other than those needed for this change, which 2to3 could not anticipate
> or handle?
>

Any of the 47 open issues on the bug tracker to start with :(

-- 
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.

Mark Lawrence