Add unbind() to interpreter

CHANGELOG.rst

@@ -4,6 +4,8 @@ Changelog
 Unreleased
 ----------
 
+ - (Added) Some documentation about running multiple statecharts.
+ - (Added) An ``unbind`` method for an ``Interpreter``.
  - (Fixed) Hook-errors reported by ``sismic-bdd`` CLI are a little bit more verbose (`#81 <https://github.com/AlexandreDecan/sismic/issues/81>`__).
 
 

docs/concurrent.rst

@@ -92,6 +92,10 @@ is sent both to ``interpreter_1`` and ``interpreter_2``.
     Events for interpreter_2: Event('test')
     Events for interpreter_3: InternalEvent('test')
 
+.. note::
+
+    Bound interpreters or callables can be unbound using the :py:meth:`~sismic.interpreter.Interpreter.unbind` method.
+
 
 Example of communicating statecharts
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

sismic/interpreter/default.py

@@ -123,6 +123,17 @@ def bind(self, interpreter_or_callable: Union['Interpreter', Callable[[Event], A
         else:
             self._bound.append(interpreter_or_callable)
 
+    def unbind(self, interpreter_or_callable: Union['Interpreter', Callable[[Event], Any]]) -> None:
+        """
+        Unbind a previously bound interpreter or callable. 
+
+        :param interpreter_or_callable: interpreter or callable to unbind
+        """
+        if isinstance(interpreter_or_callable, Interpreter):
+            self._bound.remove(interpreter_or_callable.queue)
+        else:
+            self._bound.remove(interpreter_or_callable)
+
     def bind_property_statechart(self, statechart_or_interpreter: Union[Statechart, 'Interpreter']) -> None:
         """
         Bind a property statechart to the current interpreter.

tests/test_interpreter.py

@@ -608,6 +608,21 @@ def test_bind_callable(self, interpreter):
         assert i2._select_event(consume=False) == Event('test')
         assert not isinstance(i2._select_event(consume=False), InternalEvent)
 
+    def test_unbind(self, interpreter):
+        i1, i2 = interpreter
+
+        i1.bind(i2)
+        i1.unbind(i2)
+        assert i2.queue not in i1._bound
+
+        i1.bind(i2.queue)
+        i1.unbind(i2)
+        assert i2.queue not in i1._bound
+
+        i1.bind(i2.queue)
+        i1.unbind(i2.queue)
+        assert i2.queue not in i1._bound
+
     def test_metaevent(self, interpreter):
         i1, i2 = interpreter