package/python-transitions: new package

Lightweight finite state machine implementation in Python.

https://github.com/pytransitions/transitions

Signed-off-by: Vincent Cruz <mooz@blockos.org>
[Julien:
 - remove directory for LICENSE in hash file
 - remove PKG-INFO entry in hash file
]
Signed-off-by: Julien Olivain <ju.o@free.fr>

support/testing/tests/package/sample_python_transitions.py

@@ -0,0 +1,34 @@
+# test from https://github.com/pytransitions/transitions/blob/master/tests/test_nesting.py
+
+from transitions.extensions import HierarchicalMachine as Machine
+
+states = ['standing', 'walking', {'name': 'caffeinated', 'children': ['dithering', 'running']}]
+transitions = [
+  ['walk', 'standing', 'walking'],
+  ['stop', 'walking', 'standing'],
+  ['drink', 'caffeinated_dithering', '='],
+  ['drink', 'caffeinated', 'caffeinated_dithering'],
+  ['drink', '*', 'caffeinated'],
+  ['walk', 'caffeinated', 'caffeinated_running'],
+  ['relax', 'caffeinated', 'standing']
+]
+
+machine = Machine(states=states, transitions=transitions, initial='standing', ignore_invalid_triggers=True)
+
+machine.walk()   # Walking now
+machine.stop()   # let's stop for a moment
+machine.drink()  # coffee time
+machine.state
+print(machine.state)
+machine.drink()  # again!
+print(machine.state)
+machine.drink()  # and again!
+print(machine.state)
+machine.walk()   # we have to go faster
+print(machine.state)
+machine.stop()   # can't stop moving!
+machine.state
+print(machine.state)
+machine.relax()  # leave nested state
+machine.state    # phew, what a ride
+print(machine.state)