[Python-Dev] Type hints -- a mediocre programmer's reaction

[Daniel Holth]

On Thu, Apr 23, 2015 at 5:59 AM, Paul Sokolovsky <pmiscml at gmail.com> wrote:
> Hello,
>
> On Thu, 23 Apr 2015 10:43:52 +0200
> Wolfgang Langner <tds333+pydev at gmail.com> wrote:
>
> []
>
>> Also ask why no one used type specifier, they are possible since
>> Python 3.0 ?
>> Because it is the wrong way for Python.
>
> That's an example of how perceptions differ. In my list, everyone(*)
> uses them - MyPy, MicroPython, etc. Even more should use them (any JIT
> module, which are many), but sit in the bushes, waiting for a kick, like
> PEP484 provides.

It's OK that type hints are only to assist the programmer. PyPy's FAQ
has an explanation of why type hints are not for performance.
http://pypy.readthedocs.org/en/latest/faq.html#would-type-annotations-help-pypy-s-performance