Update PxCorpus.py

PxCorpus.py

@@ -56,7 +56,7 @@ class StringIndex:
                 print(key)
                 exit(0)
 
-            if key not in self.vocab_struct:
+            if key in self.vocab_struct == False:
                 self.vocab_struct[key] = []
             
             self.vocab_struct[key].append(t)
@@ -70,9 +70,9 @@ class StringIndex:
         if t == "milligrammes":
             print("-"*50)
             print(key)
-            print(key not in self.vocab_struct)
+            print(key in self.vocab_struct)
         
-        if key not in self.vocab_struct:
+        if key in self.vocab_struct == False:
             return False
         return t in self.vocab_struct[key]