from __future__ import annotations (#4763)

* from __future__ import annotations

* updating DIRECTORY.md

* from __future__ import annotations

* from __future__ import annotations

* Update xor_cipher.py

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

DIRECTORY.md

@@ -448,6 +448,7 @@
   * [Find Min Recursion](https://github.com/TheAlgorithms/Python/blob/master/maths/find_min_recursion.py)
   * [Floor](https://github.com/TheAlgorithms/Python/blob/master/maths/floor.py)
   * [Gamma](https://github.com/TheAlgorithms/Python/blob/master/maths/gamma.py)
+  * [Gamma Recursive](https://github.com/TheAlgorithms/Python/blob/master/maths/gamma_recursive.py)
   * [Gaussian](https://github.com/TheAlgorithms/Python/blob/master/maths/gaussian.py)
   * [Greatest Common Divisor](https://github.com/TheAlgorithms/Python/blob/master/maths/greatest_common_divisor.py)
   * [Greedy Coin Change](https://github.com/TheAlgorithms/Python/blob/master/maths/greedy_coin_change.py)

ciphers/a1z26.py

@@ -5,6 +5,7 @@ corresponding to the character's position in the alphabet.
 https://www.dcode.fr/letter-number-cipher
 http://bestcodes.weebly.com/a1z26.html
 """
+from __future__ import annotations
 
 
 def encode(plain: str) -> list[int]:

ciphers/enigma_machine2.py

@@ -14,6 +14,7 @@ Module includes:
 
 Created by TrapinchO
 """
+from __future__ import annotations
 
 RotorPositionT = tuple[int, int, int]
 RotorSelectionT = tuple[str, str, str]

ciphers/trafid_cipher.py

@@ -1,4 +1,5 @@
 # https://en.wikipedia.org/wiki/Trifid_cipher
+from __future__ import annotations
 
 
 def __encryptPart(messagePart: str, character2Number: dict[str, str]) -> str:

ciphers/xor_cipher.py

@@ -16,6 +16,7 @@
         - encrypt_file : boolean
         - decrypt_file : boolean
 """
+from __future__ import annotations
 
 
 class XORCipher:
@@ -41,17 +42,10 @@ class XORCipher:
 
         key = key or self.__key or 1
 
-        # make sure key can be any size
+        # make sure key is an appropriate size
-        while key > 255:
+        key %= 255
-            key -= 255
 
-        # This will be returned
+        return [chr(ord(ch) ^ key) for ch in content]
-        ans = []
-
-        for ch in content:
-            ans.append(chr(ord(ch) ^ key))
-
-        return ans
 
     def decrypt(self, content: str, key: int) -> list[str]:
         """
@@ -66,17 +60,10 @@ class XORCipher:
 
         key = key or self.__key or 1
 
-        # make sure key can be any size
+        # make sure key is an appropriate size
-        while key > 255:
+        key %= 255
-            key -= 255
 
-        # This will be returned
+        return [chr(ord(ch) ^ key) for ch in content]
-        ans = []
-
-        for ch in content:
-            ans.append(chr(ord(ch) ^ key))
-
-        return ans
 
     def encrypt_string(self, content: str, key: int = 0) -> str:
         """