partial commit

main.py

@@ -70,6 +70,7 @@ class MainLoop(cmd2.Cmd):
         self.hidden = set()
         self.init_letters(input("Enter letters: "))
         self._candidates = None
+        self._in_dictionary = None
         super().__init__()
 
     def init_letters(self, letters):
@@ -79,6 +80,7 @@ class MainLoop(cmd2.Cmd):
         self.letters = [l for l in letters if l in LOWERCASE]
         self.prompt = MainLoop.prompt.format(", ".join(self.letters))
         self._candidates = None
+        self._in_dictionary = None
 
     @property
     def candidates(self):
@@ -86,6 +88,12 @@ class MainLoop(cmd2.Cmd):
             self._candidates = candidates(self.letters)
         return self._candidates
 
+    @property
+    def in_dictionary(self):
+        if self._in_dictionary is None:
+            self._in_dictionary = DICTS[self.dict].filter(self.candidates)
+        return self._in_dictionary
+
     def filter(self, regex):
         matching_pattern = filter(regex.match, self.candidates)
         return DICTS[self.dict].filter(matching_pattern)