correcting buggy fetching

Author: HassanOHOsman

implement-cowsay/cow.py

@@ -17,12 +17,11 @@
 
 listed_animals = [listed_animal for listed_animal in dir(cowsay) if callable(getattr(cowsay, listed_animal)) and not listed_animal.startswith("__")]
 
-if animal not in cowsay.listed_animals():
+if animal not in listed_animals:
     print(f"Error: argument --animal: invalid choice: '{animal}'")
     exit(1)
 
 animal_says = getattr(cowsay, animal)
 
 print(animal_says(message))
 
-print(dir(cowsay))