id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
6579	Importing empty symbol causes double initialization of some modules	Grzegorz Lukasik <hauserx@…>	nobody	"In file {{{templatetags/__init__.py}}} there is a line:
{{{
__path__.extend(__import__(a + '.templatetags', {}, {}, ['']).__path__)
}}}

{{{__import__}}} method as fourth parameters gets a list of symbols to import. If this list is empty, {{{__import__}}} returns the top-level package, but if the list contains anything the specified package is returned as described in http://docs.python.org/lib/built-in-funcs.html . So in this file there is a hack where not empty list but list that contains 'something' is passed - list that contains single empty name. 

But it causes some strange side-effects - the specified module is initialized twice. First with correct name and later with name followed by a dot (e.g. {{{'prog.app.templatetags'}}} and {{{'prog.app.templatetags.'}}}). In some cases it may cause serious problems."		new	Template system	dev					Accepted	1	0	0	0	0	0