fix some useranswer compare issuses

anatomy/models.py

@@ -35,6 +35,10 @@ def image_directory_path(instance, filename):
     # file will be uploaded to MEDIA_ROOT/anatomy/picture/<filename>
     return u"picture/anatomy/{0}".format(filename)
 
+def get_answer_compare(s: str) -> str:
+    s = s.strip().translate(str.maketrans("", "", string.punctuation)).lower()
+    s = " ".join(s.split())
+    return s
 
 class BodyPart(models.Model):
     bodypart = models.CharField(max_length=200)
@@ -333,11 +337,7 @@ class Answer(models.Model):
     def clean(self):
         if self.answer:
             self.answer = self.answer.strip()
-
-            s = " ".join(self.answer.lower().split())
-            s = s.translate(str.maketrans("", "", string.punctuation))
-
-            self.answer_compare = s
+            self.answer_compare = get_answer_compare(self.answer)
 
     # def get_compare_string(self):
     #     s = self.answer.lower().strip()
@@ -506,12 +506,7 @@ class UserAnswer(UserAnswerBase):
 
     def clean(self):
         if self.answer:
-            self.answer = self.answer.strip()
-
-            s = self.answer.lower()
-            s = s.translate(str.maketrans("", "", string.punctuation)).strip()
-
-            self.answer_compare = s
+            self.answer_compare = get_answer_compare(self.answer)
 
     # def get_compare_string(self):
     #     # strip here should be unneccasry (providing clean is now working)