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#
# video_demo.py
#
# Simple statemachine demo, based on the state transitions given in videostate.pystate
#
import statemachine
import videostate
class Video(videostate.VideoStateMixin):
def __init__(self, title):
self.initialize_state(videostate.Stopped)
self.title = title
# ==== main loop - a REPL ====
v = Video("Die Hard.mp4")
while True:
print(v.state)
cmd = (
input("Command ({})> ".format("/".join(videostate.VideoState.transition_names)))
.lower()
.strip()
)
if not cmd:
continue
if cmd in ("?", "h", "help"):
print("enter a transition {!r}".format(videostate.VideoState.transition_names))
print(" q - quit")
print(" ?, h, help - this message")
continue
# quitting out
if cmd.startswith("q"):
break
# get transition function for given command
state_transition_fn = getattr(v, cmd, None)
if state_transition_fn is None:
print("???")
continue
# invoke the input transition, handle invalid commands
try:
state_transition_fn()
except videostate.VideoState.InvalidTransitionException as e:
print(e)