[Python-Dev] Python startup time

[Eric Snow]

On Thu, Oct 10, 2013 at 4:18 AM, Christian Heimes <christian at python.org> wrote:
> We don't have to use a custom module type to get rid of these imports
> (but I like to get my hands a piece of chocolate cake *g*). We can
> either implement yet another mutable mapping class for the os module.
> That would remove the dependency on collections.abc.
>
> Or we have to juggle the modules a bit so we can get to MutableMapping
> without the extra stuff from collections.__init__. The abc and
> _weakset modules are already loaded by the io module. Only
> collections.__init__ imports _collections, operator, keyword, heapq,
> itertools and reprlib.

I've created a ticket for the os/collections issue:
http://bugs.python.org/issue19218.  I also put a patch on there that
takes a metaclass approach.  It removes the need to fiddle with the
collections package or to implement the other MutableMapping methods
(along with the view classes) on _Environ.

-eric