how to discriminate based on HTTP method in django urlpatterns

I don’t think you can do this with different functions without adding a bunch of logic to the URL (which is never a good idea), but you can check inside the function for the request method:

def myview(request):
    if request.method == 'GET':
        # Code for GET requests
    elif request.method == 'POST':
        # Code for POST requests

You could also switch to class-based views. You would then only need to define a method for each of the HTTP methods:

class CreateMyModelView(CreateView):
    def get(self, request, *args, **kwargs):
        # Code for GET requests

    def post(self, request, *args, **kwargs):
        # Code for POST requests

If you decide to go the class-based route, another good resource is http://ccbv.co.uk/.