Source code for observer.compat
# Python 2.7 has an importlib with import_module; for older Pythons,
# Django's bundled copy provides it.
try:
from importlib import import_module
except ImportError:
from django.utils.importlib import import_module
try:
from functools import lru_cahce
except ImportError:
try:
# use pylru instead
from pylru import lrudecorator as lru_cache
except ImportError:
# use pylru is not installed