ImportHooks vs imp

Hello.

I need to make 2 sets of templates. One generic level, and some count of
overlays for gnereric templates.

for example I have generic template /tmpl/web/main.tmpl and possible
overlays for it /tmpl/_users_/vasya/web/main.tmpl
and /tmpl/_users_/petya/web/main.tmpl.

Now to load templates I use direct calls to Template.compile and give it
required open file descriptor. But this is not very comfortable.

I want to try ImportHooks but, because of multiple, dynamically changed
search path, I don't want to add all path into sys.path. I want to use
imp module to load module from required places... After try I see that
ImportHooks and imp can't work together.

Into attach my example, where I try to use ImportHooks and imp
toogether(_gen.tmpl and t0.tmpl locaten into /tmp/tmpl. empty
__init__.py too placed into /tmp/tmpl).

Is there a way to use ImportHooks and not place all search path into
sys.path?

PS Sorry for my English.

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#!/usr/bin/env python
#-*- coding:utf-8 -*-

#import pdb

#import os, sys
#import time
#import logging
#import re
#import errno
#import locale
#import pprint

# mutable inputs
import imp
import Cheetah
import Cheetah.ImportHooks
Cheetah.ImportHooks.install()
#Cheetah.ImportHooks.setCacheDir('/home/vugluskr/tmp/z/cache')

def load_tmpl(name):
    fp, pathname, description = imp.find_module(name)
    #fp, pathname, description = imp.find_module(name, ['/tmp/tmpl'])

    try:
        m = imp.load_module(name, fp, pathname, description)
	return getattr(m, name)
    finally:
        # Since we may exit via an exception, close fp explicitly.
        if fp:
            fp.close()    

def main():
    t = load_tmpl('t0')
    print t()

if __name__ == '__main__':
    main()

#def meth0()
meth0
aAaaAa
#end def

byaka byak.

$meth0

## comment
zzz...

#import _gen
#extends _gen._gen

#def meth0()
meth0 - t0
aAaaAa
BbbBbb
#end def