Split base85.py into functions, Add doctests (#5746)

* Update base16.py

* Rename base64_encoding.py to base64.py

* Split into functions, Add doctests

* Update base16.py

ciphers/base85.py

@@ -1,13 +1,33 @@
 import base64
 
 
-def main() -> None:
-    inp = input("->")
-    encoded = inp.encode("utf-8")  # encoded the input (we need a bytes like object)
-    a85encoded = base64.a85encode(encoded)  # a85encoded the encoded string
-    print(a85encoded)
-    print(base64.a85decode(a85encoded).decode("utf-8"))  # decoded it
+def base85_encode(string: str) -> bytes:
+    """
+    >>> base85_encode("")
+    b''
+    >>> base85_encode("12345")
+    b'0etOA2#'
+    >>> base85_encode("base 85")
+    b'@UX=h+?24'
+    """
+    # encoded the input to a bytes-like object and then a85encode that
+    return base64.a85encode(string.encode("utf-8"))
+
+
+def base85_decode(a85encoded: bytes) -> str:
+    """
+    >>> base85_decode(b"")
+    ''
+    >>> base85_decode(b"0etOA2#")
+    '12345'
+    >>> base85_decode(b"@UX=h+?24")
+    'base 85'
+    """
+    # a85decode the input into bytes and decode that into a human readable string
+    return base64.a85decode(a85encoded).decode("utf-8")
 
 
 if __name__ == "__main__":
-    main()
+    import doctest
+
+    doctest.testmod()