Merge pull request #168 from ikostan/main

Merge from master

Author: ikostan

solutions/python/atbash-cipher/1/atbash_cipher.py

@@ -0,0 +1,38 @@
+"""
+This is an implementation of the 'Atbash' cipher, an ancient
+encryption system created in the Middle East.
+"""
+
+import string
+
+alphabet: str = string.ascii_lowercase
+
+
+def encode(plain_text: str) -> str:
+    temp_txt: [str] = [
+        _replace(char) for char in plain_text if char not in ".,!? "
+    ]
+    if len(temp_txt) > 4:
+        step: int = 5
+        i_start: int = 0
+        i_end: int = i_start + step
+        txt: list[str] = []
+        while i_start <= len(temp_txt):
+            tmp: str = "".join(temp_txt[i_start:i_end])
+            if tmp:
+                txt.append(tmp)
+            i_start, i_end = i_end, i_end + step
+        print(f"{' '.join(txt)}")
+        return " ".join(txt)
+    return "".join(temp_txt)
+
+
+def _replace(char: str) -> str:
+    if char.lower().isalpha():
+        new_indx: int = alphabet.index(char.lower()) + 1
+        return alphabet[-new_indx]
+    return char
+
+
+def decode(ciphered_text: str) -> str:
+    return encode(ciphered_text).replace(" ", "")