Refactored the naming of the function and added the get_difference function...

Refactored the naming of the function and added the get_difference function again as it was necessary for data_comparer

umbra/words.py

@@ -12,7 +12,7 @@ class Word:
         return 1
 
     def __eq__(self, word):
-        return self._word == word.get_word()
+        return self._word == word.word()
 
     @property
     def word(self):
@@ -68,6 +68,15 @@ class Word:
         """
         self._anchor = anchor
 
+    def get_difference(self, other):
+        """Get the difference between the onset of this word and the other.
+
+        Args:
+            other: the other Word instance
+        """
+        difference = self.onset - other.get_onset()
+        return difference
+
 
 class ShadowWord(Word):
     def __init__(self, word, onset, offset):
@@ -135,6 +144,24 @@ class SourceWord(Word):
         """
         self._shadowed = value
 
+    @property
+    def source(self):
+        """Getter for the source attribute
+
+        Returns:
+             source: the word in the source file this word is aligned with
+        """
+        return self.source
+
+    @source.setter
+    def source(self, source):
+        """Set which word this one is aligned with
+
+        Args:
+            source: the source word that this word is set to be aligned with
+        """
+        self.source = source
+
 
 class Sentence:
     def __init__(self, words):