moved AttrDict cast into static method

sharex_server.py

@@ -23,8 +23,8 @@ class AttrDict(dict):
     def __getattr__(self, item):
         return self.setdefault(item, AttrDict())
 
-
-def cast_to_ad(d):
+    @staticmethod
+    def from_dict_recur(d):
         if not isinstance(d, AttrDict):
             d = AttrDict(d)
         for k, v in dict(d.items()).items():
@@ -32,7 +32,7 @@ def cast_to_ad(d):
                 del d[k]
                 d[k.replace(" ", "_")] = v
             if isinstance(v, dict):
-            d[k] = cast_to_ad(v)
+                d[k] = AttrDict.from_dict_recur(v)
         return d
 
 
@@ -155,7 +155,7 @@ if __name__ == '__main__':
     file_db = defaultdict(dict)
     confname = sys.argv[1] if sys.argv[1:] and os.path.isfile(sys.argv[1]) else 'config.yaml'
     with open(confname) as cf:
-        conf = cast_to_ad(yaml.load(cf))
+        conf = AttrDict.from_dict_recur(yaml.load(cf))
     if conf.url_hash_len > 31:
         raise ValueError('url_hash_len can\'t be bigger than 31')
     if not set(conf.max_filesize.replace(' ', ''))\