On 11/12/2013 5:28 PM, Sergey wrote:
def get_obj():
   pkg = load_package_strict("tmp", basedir)
   from tmp import main
   return main.TTT()

It is working, but if package code changes on disc at runtime and I call 
get_obj again, it returns instance of class, loaded for the first time 
previously.

How to replace line "from tmp import main" by getting properties of pkg?

Your `load_package_strict` function loads the `tmp` module and binds it to the name `pkg`. You then use a regular import to load `tmp.main`, which is _cached_; all subsequent occurrences reuse the initially imported value.

This should work:

    def get_obj():
       tmp = load_package_strict("tmp", basedir)
       return tmp.main.TTT()
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