More refactoring to get things in own files to help my understanding

Encoder.py

@@ -0,0 +1,43 @@
+class Encoder:
+    """
+    Hamming and Manchester Encoding example
+
+    Author: Joel Addison
+    Date: March 2013
+
+    Functions to do (7,4) hamming encoding and decoding, including error detection
+    and correction.
+    Manchester encoding and decoding is also included, and by default will use
+    least bit ordering for the byte that is to be included in the array.
+    """
+
+    def extract_bit(self, byte, pos):
+        """
+        Extract a bit from a given byte using MS ordering.
+        ie. B7 B6 B5 B4 B3 B2 B1 B0
+        """
+        return (byte >> pos) & 0x01
+
+    def manchester_encode(self, byte):
+        """
+        Encode a byte using Manchester encoding. Returns an array of bits.
+        Adds two start bits (1, 1) and one stop bit (0) to the array.
+        """
+        # Add start bits (encoded 1, 1)
+        # manchester_encoded = [0, 1, 0, 1]
+        manchester_encoded = []
+
+        # Encode byte
+        for i in range(7, -1, -1):
+            if self.extract_bit(byte, i):
+                manchester_encoded.append(0)
+                manchester_encoded.append(1)
+            else:
+                manchester_encoded.append(1)
+                manchester_encoded.append(0)
+
+        # Add stop bit (encoded 0)
+        # manchester_encoded.append(1)
+        # manchester_encoded.append(0)
+
+        return manchester_encoded