def createPlayer1(autEnabled):
'''createPlayer1(autEnabled) -> Automaton
Synthesises a transducer for Player 1 from the Enabled automaton autEnabled.
Player 1 nondeterministically chooses one enabled transition (if such exists).
'''
enabledTransd = autEnabled.toTransducer()
# the transducer for "no transition enabled"
noEnabledTransTransd = enabledTransd.renameStates(lambda s: s + '_noEn')
noEnabledTransTransd = noEnabledTransTransd.filterTrans(
lambda trans: (trans[1], trans[2]) != (SYMBOL_ENABLED, SYMBOL_ENABLED))
noEnabledTransTransd = noEnabledTransTransd.removeUseless()
rename1 = lambda state: state + "_en1"
rename2 = lambda state: state + "_en2"
# the transducer for chosing one enabled transition
oneChosenTransTransd1 = enabledTransd.renameStates(rename1)
oneChosenTransTransd2 = enabledTransd.renameStates(rename2)
oneChosenTransTransd1 = oneChosenTransTransd1.clearAcceptStates()
oneChosenTransTransd2 = oneChosenTransTransd2.clearStartStates()
oneChosenTransTransdMerged = Automaton.autUnion(oneChosenTransTransd1, oneChosenTransTransd2)
for trans in enabledTransd.transitions:
fstSymb = Automaton.getSymbol1(trans)
sndSymb = Automaton.getSymbol2(trans)
if (fstSymb, sndSymb) == (SYMBOL_ENABLED, SYMBOL_ENABLED):
oneChosenTransTransdMerged.addTransTransd(
rename1(Automaton.getSrcState(trans)),
SYMBOL_ENABLED,
SYMBOL_CHOSEN,
rename2(Automaton.getTgtState(trans)))
# result = Automaton.autUnion(oneChosenTransTransdMerged, noEnabledTransTransd)
result = oneChosenTransTransdMerged
result = result.singleStartState(PLAYER1_START_STATE)
return result
