Added an empty form_checker class that still needs to be implemented. Added...

Added an empty form_checker class that still needs to be implemented. Added the mistake type form to the mistake enum. Added the checks from the form_checker to the NW class.

umbra/form_checker.py

+class FormChecker:
+
+    def __init__(self):
+        pass
+
+    def form_related(self, source_word, shadow_word):
+        pass
\ No newline at end of file

umbra/mistake_enum.py

@@ -16,3 +16,4 @@ class Mistake(Enum):
     SEMANTIC = "semantic"
     SKIPPED = "skipped"  # For source words that are not shadowed
     RANDOM = "random"  # For shadow words that do not reflect a source word
+    FORM = "form"   # For verbs that are shadowed in another form

umbra/needleman_wunsch.py

@@ -16,6 +16,7 @@ class NeedlemanWunsch(AlignmentStrategy):
         self._gap_sc = -1
         self._seman_match = 2
         self._repetition = 0
+        self._form_match = 2
         self._pointers = ['diag', 'up', 'left']
         self._source = None
         self._shadow = None
@@ -23,7 +24,8 @@ class NeedlemanWunsch(AlignmentStrategy):
         self._seman_checker = seman_checker
 
     def alignment_options(self, match=None, mismatch=None,
-                gap_sc=None, seman_match=None, repetition=None):
+                gap_sc=None, seman_match=None, repetition=None,
+                          form_match=None):
         """ Set the scores that are allocated whilst aligning. Can be changed
             one at a time or more at once.
 
@@ -44,6 +46,10 @@ class NeedlemanWunsch(AlignmentStrategy):
             self._gap_sc = gap_sc
         if seman_match:
             self._seman_match = seman_match
+        if repetition:
+            self._repetition = repetition
+        if form_match:
+            self._form_match = form_match
 
     def align(self, source, shadow):
         """ This is the main function of finding alignments.
@@ -93,6 +99,9 @@ class NeedlemanWunsch(AlignmentStrategy):
             for j in range(1, n+1):
                 if self._source[j - 1] == self._shadow[i - 1]:
                     value = self._match
+                elif self._form_checker.form_related(self._source[j-1].word,
+                                                     self._shadow[i-1].word):
+                    value = self._form_match
                 elif self._seman_checker.semantically_related(
                         self._source[j-1].word, self._shadow[i-1].word):
                     value = self._seman_match
@@ -174,4 +183,8 @@ class NeedlemanWunsch(AlignmentStrategy):
             source.shadowed = True
             source.mistake = Mistake.SEMANTIC
             shadow.mistake = Mistake.SEMANTIC
+        elif self._form_checker.form_related(source.word, shadow.word):
+            source.shadowed = True
+            source.mistake = Mistake.FORM
+            shadow.mistake = Mistake.FORM
         return source, shadow