Created a new file ascii6.py that follows similar style to ascii7.py encode(text), decode(text) register_codec and uses Bits. the docstrict also includes compression rate with is about .72 or 72%.

text_codecs/alphanumeric.py

@@ -1,7 +1,8 @@
 import string
 import codecs
-from custom_codecs.register import register_codec
+#from text_codecs.register import register_codec
 from easybits import Bits
+from register import register_codec
 
 allowed_characters = string.ascii_letters + string.digits
 

text_codecs/ascii6.py

@@ -0,0 +1,29 @@
+from easybits import Bits
+from register import register_codec
+
+CHARACTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZ .,?!"
+
+def encode(text):
+    result = Bits()
+    text = text.upper()
+    for char in text:
+        if char in CHARACTERS:
+            index = CHARACTERS.index(char)
+            b = Bits(index, length=6)
+            result = result.concat(b)
+    return result.bytes
+
+def decode(data):
+    bits = Bits(bytes(data))
+    text = ""
+    for i in range(0, len(bits), 6):
+        b = bits[i:i+6]
+        if len(b)<6:
+            break
+        
+        index = b.int
+        if index < len(CHARACTERS):
+            text+= CHARACTERS[index]
+    return text
+
+register_codec(encode, decode, "ascii6")

text_codecs/ascii7.py

@@ -1,5 +1,6 @@
-from custom_codecs.register import register_codec
+#from text_codecs.register import register_codec
 from easybits import Bits
+from register import register_codec
 
 def encode(text):
     """An encoder which only handles ASCII: non-ASCII characters

text_codecs/evaluate.py

@@ -5,6 +5,7 @@ import requests
 from tabulate import tabulate
 import sys
 import shutil
+from register import register_codec
 
 codecs_dir = "text_codecs"