this was hard, lol

text_codecs/alphanumeric.py

@@ -1,39 +1,26 @@
-import string
 import codecs
 from custom_codecs.register import register_codec
-from easybits import Bits
 
-allowed_characters = string.ascii_letters + string.digits
 
 def encode(text):
-    """A (very) lossy encoder which only saves ASCII letters, numbers, and spaces.
-    Everything else is discarded. All whitespace (e.g. tabs) is converted into spaces.
-    """
-    ascii_characters = []
-    last_character_was_space = False
-    for char in text:
-        if char in allowed_characters:
-            ascii_characters.append(char)
-            last_character_was_space = False
-        elif char in string.whitespace and not last_character_was_space:
-            ascii_characters.append(' ')
-            last_character_was_space = True
-    ascii_text = ''.join(ascii_characters)
-    return Bits(ascii_text).bytes
+    result = []
+
+    last_space = False
+
+    for c in text:
+        if c.isalnum():
+            result.append(c)
+            last_space = False
+        elif c == " ":
+            if not last_space:
+                result.append(" ")
+            last_space = True
+
+    return "".join(result).encode("ascii")
+
 
 def decode(data):
-    """A decoder which reads bytes and returns (string, length), 
-    where length is the length of bytes consumed
-    """
-    text = ""
-    for i, byte in enumerate(data):
-        try:
-            text += Bits(byte, length=8).ascii
-        except OverflowError:
-            print(i, byte)
-            print(text + '|')
-            print("Error")
-            breakpoint()
-    return text
-    
-register_codec(encode, decode, "alphanumeric")
+    return data.decode("ascii")
+
+
+register_codec("alphanumeric", encode, decode)