Steps

1. Install django-mooch using pip and add mooch to your INSTALLED_APPS.

2. Add a moochers app:

   from collections import OrderedDict
   
   from django.conf import settings
   from django.conf.urls import include, url
   
   from mooch.banktransfer import BankTransferMoocher
   from mooch.postfinance import PostFinanceMoocher
   from mooch.stripe import StripeMoocher
   
   from myapp.models import Thing  # Inherit mooch.models.Payment
   
   
   app_name = 'mooch'  # This is the app namespace.
   
   moochers = OrderedDict((
       ('postfinance', PostFinanceMoocher(
           model=Thing,
           pspid='thing',
           live=False,
           sha1_in=settings.POSTFINANCE_SHA1_IN,
           sha1_out=settings.POSTFINANCE_SHA1_OUT,
           app_name=app_name,
       )),
       ('stripe', StripeMoocher(
           model=Thing,
           publishable_key=settings.STRIPE_PUBLISHABLE_KEY,
           secret_key=settings.STRIPE_SECRET_KEY,
           app_name=app_name,
       )),
       ('banktransfer', BankTransferMoocher(
           model=Thing,
           autocharge=True,  # Mark all payments as successful.
           app_name=app_name,
       )),
   ]
   
   urlpatterns = [
       url(r'', moocher.urls) for moocher in moochers.values()
   ]

3. Include the moochers app / URLconf somewhere in your other URLconfs.

4. Add a payment page:

   def pay(request, id):
       instance = get_object_or_404(Thing.objects.all(), id=id)
   
       return render(request, 'pay.html', {
           'thing': instance,
           'moochers': [
               moocher.payment_form(request, instance)
               for moocher in moochers.values()
           ],
       })

5. Maybe send a confirmation mail when charges happen (an example template for this is actually included with the project). Please note that contrary to most other projects, django-mooch uses the moocher instance as sender, not the class:

   from mooch.mail import render_to_mail
   from mooch.signals import post_charge
   
   # The signal handler receives the moocher instance, the payment and
   # the request.
   def send_mail(sender, payment, request, **kwargs):
       render_to_mail('mooch/thanks_mail', {
           'payment': payment,
       }, to=[payment.email]).send(fail_silently=True)
   
   # Connect the signal to our moocher instances (moochers may be used
   more than once on the same website):
   for moocher in moochers.values():
       post_charge.connect(send_mail, sender=moocher)

   If you want to differentiate between moochers (for example to send a different mail for bank transfers, because the payment has not actually happened yet) set the sender argument when connecting as follows:

   # Some stuff you'll have to imagine... sorry.
   post_charge.connect(thank_you_mail, moochers['postfinance'])
   post_charge.connect(thank_you_mail, moochers['stripe'])
   post_charge.connect(please_pay_mail, moochers['banktransfer'])