Hi, In an old issue, I proposed a change to not load the sysconfig module when it's not needed. Nobody reviewed the patch, the issue was closed.
http://bugs.python.org/issue14057 When -s or -I option is used, we may skip completly the sysconfig module. (It's already the case when -S is used.) By the way, we should probably remove the site module. It's a pain for the startup time :-) Victor 2013/10/10 Christian Heimes <christ...@python.org>: > Am 10.10.2013 02:18, schrieb Eric Snow: >> On Wed, Oct 9, 2013 at 8:30 AM, Christian Heimes >> <christ...@python.org> wrote: >>> The os module imports MutableMapping from collections.abc. That >>> import adds collections, collections.abc and eight more modules. >>> I'm not sure if we can do anything about it, though. >> >> Well, that depends on how much we want to eliminate those 10 >> imports. :) Both environ and environb could be turned into lazy >> wrappers around an _Environ-created-when-needed. If we used a >> custom module type for os [1], then adding descriptors for the two >> attributes is a piece of cake. As it is, with a little metaclass >> magic (or even with explicit wrapping of the various dunder >> methods), we could drop those 10 imports from startup. > > 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 implemented both as an experiment. A lean and mean MutableMapping > works but it involves some code duplication. Next I moved > collections.abc to its former place _abcoll and installed a new > collections.abc module as facade. > > $ hg mv Lib/collections/abc.py Lib/_abcoll.py > $ echo "from _abcoll import *" > Lib/collections/abc.py > $ echo "from _abcoll import __all__" >> Lib/collections/abc.py > $ sed -i "s/collections\.abc/_abcoll/" Lib/os.py > > > With three additional patches I'm down 19 modules: > > $ ./python -c "import sys; print(len(sys.modules))" > 34 > $ hg revert --all . > $ ./python -c "import sys; print(len(sys.modules))" > 53 > > Christian > _______________________________________________ > 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/victor.stinner%40gmail.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
