Put everything under if name = "__main__", added words guessed already

main.py

@@ -12,27 +12,39 @@ def canidates(letters, min=2, max=5):
             for perm in itertools.permutations(comb):
                 word = ''.join(perm)
                 pos.append(word)
-    return SPELL.known(pos)
+    return set(SPELL.known(pos))
 
 
 def filter_pos(pos, regex):
     pat = re.compile(regex + '$')
-    return list(filter(pat.match, pos))
+    return set(filter(pat.match, pos))
 
 
-while True:
-    letters = input('Enter letters: ')
-    if letters == ":quit:":
-        break
-    pos = canidates(letters)
-    inp = None
-    while inp not in (":quit:", ":new:"):
-        if inp is not None:
-            for word in filter_pos(pos, inp):
-                print('>>>', word)
-        print('Letters: ', ','.join(letters))
-        prompt = """Enter pattern, ':new:' for new letters,
-or ':quit:' to exit: """
-        inp = input(prompt)
-    if inp == ":quit:":
-        break
+if __name__ == "__main__":
+    while True:
+        letters = input('Enter letters: ')
+        if letters == ":quit:":
+            break
+        pos = canidates(letters)
+        inp = None
+        guessed = set()
+        while inp not in (":quit:", ":new:"):
+            if inp == ":enter:":
+                inp = None
+                while inp != ":done:":
+                    if inp is not None:
+                        guessed.add(inp)
+                    inp = input("Enter guessed word, :done: to exit: ")
+            elif inp is not None:
+                fpos = filter_pos(pos, inp)
+                for word in fpos-guessed:
+                    print('>>>', word)
+            print('Letters: ', ','.join(letters))
+            prompt = """\
+Enter pattern,
+':new:' for new letters,
+':enter:' to fill in guessed words, or
+':quit:' to exit: """
+            inp = input(prompt)
+        if inp == ":quit:":
+            break