Complete implement-cowsay exercise

Author: shaghayeghfar

implement-cowsay/cow.py

@@ -0,0 +1,29 @@
+import cowsay
+import argparse
+
+# get valid animals dynamically from the library
+animals = [
+    name for name in dir(cowsay)
+    if name.islower() and callable(getattr(cowsay, name))
+]
+
+parser = argparse.ArgumentParser(description="Make animals say things")
+
+parser.add_argument(
+    "message",
+    nargs="+",
+    help="The message to say."
+)
+
+parser.add_argument(
+    "--animal",
+    choices=animals,
+    default="cow",
+    help="The animal to be saying things."
+)
+
+args = parser.parse_args()
+
+message = " ".join(args.message)
+
+getattr(cowsay, args.animal)(message)