Add Python cowsay CLI with animal selection and validation

Author: RahwaZeslusHaile

implement-cowsay/cowsay_script.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+import argparse
+import cowsay
+import sys
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Make animals say things"
+    )
+    parser.add_argument(
+        "message", nargs="+", help="The message to say."
+    )
+    parser.add_argument(
+        "--animal",
+        default="cow",
+        help="The animal to be saying things."
+    )
+
+    args = parser.parse_args()
+
+    text = " ".join(args.message)
+    animal = args.animal  
+
+    supported_animals = [
+        "beavis", "cheese", "cow", "daemon", "dragon", "fox",
+        "ghostbusters", "kitty", "meow", "miki", "milk", "octopus",
+        "pig", "stegosaurus", "stimpy", "trex", "turkey", "turtle", "tux"
+    ]
+
+    if animal not in supported_animals:
+        print(f"usage: cowsay [-h] [--animal {{{','.join(supported_animals)}}}] message [message ...]")
+        print(f"cowsay: error: argument --animal: invalid choice: '{animal}' (choose from {','.join(supported_animals)})")
+        sys.exit(1)
+
+    output = cowsay.get_output_string(animal, text)
+    print(output)
+
+if __name__ == "__main__":
+    main()