Hello, On Thu, 23 Apr 2015 09:15:44 -0400 Daniel Holth <dho...@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. Yes, it's OK to have a situation where type hints assist only a programmer. It's not OK to think that type hints may be useful only for programmer, instead of bunch more purposes, several of which were already shown in the long previous discussion. > 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 You probably intended to write "why type hints are not for *PyPy's* performance". There're many other language implementations and modules for which it may be useful, please don't limit your imagination by a single case. And speaking of PyPy, it really should think how to improve its performance - not of generated programs, but of generation itself. If compilation of a trivial program on a pumpy hardware takes 5 minutes and gigabytes of RAM and diskspace, few people will use it for other purposes beyond curiosity. There's something very un-Pythonic in waiting 5 mins just to run 10-line script. Type hints can help here too ;-) (by not wasting resources propagating types thru the same old standard library for example). -- Best regards, Paul mailto:pmis...@gmail.com _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
