Initial data commit

Task/Substitution-cipher/Python/substitution-cipher-1.py

@@ -0,0 +1,19 @@
+from string import printable
+import random
+
+EXAMPLE_KEY = ''.join(sorted(printable, key=lambda _:random.random()))
+
+def encode(plaintext, key):
+    return ''.join(key[printable.index(char)] for char in plaintext)
+
+def decode(plaintext, key):
+    return ''.join(printable[key.index(char)] for char in plaintext)
+
+original = "A simple example."
+encoded = encode(original, EXAMPLE_KEY)
+decoded = decode(encoded, EXAMPLE_KEY)
+print("""The original is: {}
+Encoding it with the key: {}
+Gives: {}
+Decoding it by the same key gives: {}""".format(
+    original, EXAMPLE_KEY, encoded, decoded))