monkeya=input("is monkey A smiling? (yes or no) ")
monkeyb=input("is monkey B smiling? (yes or no) ")
if monkeya="yes" and monkeyb="yes":
print("unsafe - plotting")
elif monkeya="no" and monkeyb="no":
print("unsafe - angry")
else:
print("safe")
平等检验需要double==,你用的是单=:
if monkeya=="yes" and monkeyb=="yes":
print("unsafe - plotting")
elif monkeya=="no" and monkeyb=="no":
print("unsafe - angry")