Refactor dictionary logic into it's own file.

dictionary.py

@@ -0,0 +1,80 @@
+#!/usr/bin/python
+
+
+WORDLE_LENGTH = 5
+
+
+_wordle_dictionary = set()
+
+
+_invalid_words = set(
+    [
+        "amala",
+        "arara",
+        "araru",
+        "araua",
+        "arawa",
+        "balak",
+        "batak",
+        "bayal",
+        "beala",
+        "beata",
+        "beele",
+        "boily",
+        "bolty",
+        "bruke",
+        "carlo",
+        "caroa",
+        "carot",
+        "carum",
+        "divet",
+        "doray",
+        "erept",
+        "fikie",
+        "genae",
+        "ghole",
+        "gotra",
+        "hirse",
+        "hyrse",
+        "katat",
+        "korah",
+        "macco",
+        "mitra",
+        "muang",
+        "nurry",
+        "odell",
+        "odell",
+        "petro",
+        "pindy",
+        "quito",
+        "retan",
+        "roter",
+        "sisel",
+        "skeel",
+        "staia",
+        "stail",
+        "sussy",
+        "tebet",
+        "telae",
+        "theet",
+        "undig",
+        "uninn",
+        "unkin",
+        "vedet",
+        "whalm",
+        "whaly",
+    ]
+)
+
+
+def words():
+    if not _wordle_dictionary:
+        with open("words_alpha.txt") as word_file:
+            all_words = word_file.read().split()
+        _wordle_dictionary.update(
+            filter(
+                lambda w: len(w) == WORDLE_LENGTH and w not in _invalid_words, all_words
+            )
+        )
+
+    return _wordle_dictionary