commit c5377194dfdfdec4d99bc514b24ef62ab26beef4 (make_pythonic)
Date:   Thu Feb 17 11:15:48 2022 -0500

    Seek forgiveness, not permission
    
    It is more Pythonic (and safer in concurrent situations) to attempt an
    operation and handle failure, rather than trying to check that the
    operation should succeed first.  This is a non-functional style change.

diff --git a/python/scrambler.py b/python/scrambler.py
index 0f5e989..5fe6148 100644
--- a/python/scrambler.py
+++ b/python/scrambler.py
@@ -4,12 +4,14 @@ import sys
 from cs5150.cipher_string import CipherString
 
 if __name__ == '__main__':
-    if len(sys.argv) != 2:
+    try:
+        plaintext = sys.argv[1]
+    except IndexError:
         print(f'Invalid number of arguments ({len(sys.argv) - 1} != 1)',
               file=sys.stderr)
         raise SystemExit(f'Usage: {sys.argv[0]} <plaintext>')
     try:
-        p = CipherString.from_string(sys.argv[1].upper())
+        p = CipherString.from_string(plaintext.upper())
         k = CipherString.from_string('cdm89'.upper())
         print(k.encrypt(p))
     except ValueError: