Using self attr instead of passing in object reference

dictionary.py

@@ -13,15 +13,16 @@ english = package_root / 'resources' / 'en.json.gz'
 extra_words = pathlib.Path(__file__, '..', 'extra_words.txt')
 
 
-def do_operation(obj, bound_method, *args, **kwargs):
+def do_operation(bound_method, *args, **kwargs):
     bound_method(*args, **kwargs)
+    obj = bound_method.__self__
     return obj
 
 
 default_load_future = EXECUTOR.submit(
-    do_operation, DEFAULT, DEFAULT.load_dictionary, english)
+    do_operation, DEFAULT.load_dictionary, english)
 alternate_load_future = EXECUTOR.submit(
-    do_operation, ALTERNATE, ALTERNATE.load_text_file, english)
+    do_operation, ALTERNATE.load_text_file, english)
 
 
 class Dictionary:
@@ -42,7 +43,8 @@ class Dictionary:
             def filter_func(word): return word in self.word_frequency
         else:
             def filter_func(
-                word): return word not in excludes and word in self.word_frequency
+                    word):
+                return word not in excludes and word in self.word_frequency
         return set(filter(filter_func, wordlist))