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Service objects designed with OOP in mind.

Project description

Stories build pypi

Service objects designed with OOP in mind.

Documentation | Source Code | Task Tracker

A paragraph of text explaining the goal of the library…


  • A feature
  • B feature
  • etc


A line of text explaining snippet below…

>>> from dataclasses import dataclass
>>> from typing import Callable
>>> from stories import Story, I, State
>>> from app.repositories import load_order, load_customer, create_payment

>>> @dataclass
... class Purchase(Story):
...     I.find_order
...     I.find_customer
...     I.check_balance
...     I.persist_payment
...     def find_order(self, state):
...         state.order = self.load_order(state.order_id)
...     def find_customer(self, state):
...         state.customer = self.load_customer(state.customer_id)
...     def check_balance(self, state):
...         if not state.order.affordable_for(state.customer):
...             raise Exception
...     def persist_payment(self, state):
...         state.payment = self.create_payment(
...             order_id=state.order_id, customer_id=state.customer_id
...         )
...     load_order: Callable
...     load_customer: Callable
...     create_payment: Callable

>>> purchase = Purchase(
...     load_order=load_order,
...     load_customer=load_customer,
...     create_payment=create_payment,
... )

>>> state = State(order_id=1, customer_id=1)

>>> purchase(state)

>>> state  # doctest: +SKIP

>>> state.payment.was_received()


If you have any questions, feel free to create an issue in our Task Tracker. We have the question label exactly for this purpose.

Enterprise support

If you have an issue with any version of the library, you can apply for a paid enterprise support contract. This will guarantee you that no breaking changes will happen to you. No matter how old version you're using at the moment. All necessary features and bug fixes will be backported in a way that serves your needs.

Please contact if you're interested in it.


stories library is offered under the two clause BSD license.

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