January 2015
Intermediate to advanced
212 pages
4h 22m
English
Content preview from Mastering Python Design PatternsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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A software example
Using the State pattern in essence means implementing a state machine to solve a software problem in a specific domain. The django-fsm package is a third-party package that can be used to simplify the implementation and usage of state machines in the Django framework [j.mp/django-fsm].
Python offers more than one third-party package/module to use and implement state machines [j.mp/pyfsm]. We will see how to use one of them in the implementation section.
Another project worth mentioning is the State Machine Compiler (SMC). With SMC, you can describe your state machine in a single text file using a simple Domain Specific Language (DSL), and it will generate the state machine's code automatically. The project claims that the DSL ...
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