On Demand Auto Load Modules / Submodules

Sometimes it’s convenient if you have a LOT of submodules (probably a design problem :P) to load them on demand. Treating them like folders.

Put this snippet into your init.py file, in the module and let it do its magic.

# Stick the following in the bottom of your __init__.py, then simply import the base package. Use submodules as you need them and they'll be imported as you go.
import sys as _sys
class Package(object):
def __init__(s, local):
import os.path
s.cache = {}
s.local = dict((k, local[k]) for k in local)
s.root = os.path.realpath(os.path.dirname(s.local["__file__"]))
def __getattr__(s, k):
if k in s.local: return s.local[k]
if k in s.cache: return s.cache[k]
path = list(s.local["_sys"].path)
# s.local["_sys"].path.insert(0, s.root)
s.local["_sys"].path = [s.root]
try: s.cache[k] = __import__(k)
finally: s.local["_sys"].path[:] = path
return s.cache[k]
_sys.modules[__name__] = Package(locals())