A library implementing workflows (or state machines) for Python projects.
Project description
XWorkflows is a library to add workflows, or state machines, to Python objects.
It allows to easilly define a workflow, attach it to a class, and use its transitions:
class MyWorkflow(xworkflows.Workflow):
# A list of state names
states = ('foo', 'bar', 'baz')
# A list of transition definitions; items are (name, source states, target).
transitions = (
('foobar', 'foo', 'bar'),
('gobaz', ('foo', 'bar'), 'baz'),
('bazbar', 'baz', 'bar'),
)
initial_state = 'foo'
class MyObject(xworkflows.WorkflowEnabled):
state = MyWorkflow()
# If a method has the name of a transition, it is used as its implementation.
def foobar(self):
return 42
# It is also possible to use another method for a given transition.
@transition('gobaz')
def blah(self):
return 13
>>> o = MyObject()
>>> o.state
State('foo', 'foo')
>>> o.state.is_foo
True
>>> o.foobar()
42
>>> o.state
State('bar', 'bar')
>>> o.blah()
13
>>> o.state
State('baz', 'baz')
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