"Frank Millman" <fr...@chagford.com> wrote in message news:jid2a9$n21$1...@dough.gmane.org... > Hi all > > I seem to have a recurring battle with circular imports, and I am trying > to nail it once and for all. > [...] > > The second solution is - > > in formats/__init__.py > import sys > sys.path.insert(0, __path__[0]) > > in wavread.py - > import wavwrite > > in wavwrite.py - > import wavread > > This works, but I don't know if it is a good idea to add all the > sub-package paths to sys.path. I realise that it is up to me to avoid any > name clashes. Are there any other downsides? >
Answering my own question, I have just found a downside that is a showstopper. If a module in a different sub-package needs to import one of these modules, it must use a full path. This results in a new entry in sys.modules, and therefore any attributes referenced by the intra-package module have different identities from those referenced from outside. If they are static, there is no problem, but if not, disaster strikes! Frank -- http://mail.python.org/mailman/listinfo/python-list
