ModuleNotFoundError: No module named 'oscar.app'

 解决方案如下:

from django.conf.urls import include, url
from django.contrib import admin
from oscar.app import application
from django.conf import settings
from django.conf.urls.static import static

urlpatterns = [
    url(r'^i18n/', include('django.conf.urls.i18n')),
    url(r'^admin/', include(admin.site.urls)),
    url(r'^checkout/paypal/', include('paypal.express.urls')),
    url(r'', include(application.urls)),
] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

改为:

from django.conf.urls import include, url
from django.contrib import admin
# from oscar.app import application
from oscar import apps
from django.conf import settings
from django.conf.urls.static import static

urlpatterns = [
    url(r'^i18n/', include('django.conf.urls.i18n')),
    url(r'^admin/', include(admin.site.urls)),
    url(r'^checkout/paypal/', include('paypal.express.urls')),
    # url(r'', include(application.urls)),
    url(r'^', include(apps.get_app_config('oscar').urls[0])),
] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)