invalid syntax on =? [closed]

Answer 1

Equality test requires a double ==, you used single =:

if monkeya=="yes" and monkeyb=="yes":
   print("unsafe - plotting")

elif monkeya=="no" and monkeyb=="no":
   print("unsafe - angry")

A single = equals sign is an assignment statement, which you cannot use inside of an expression (so not after if).

Answer 2

You should use double equals sign on comparing two values:

if monkeya == "yes" and monkeyb == "yes":