moved AttrDict cast into static method

sharex_server.py

@@ -23,17 +23,17 @@ class AttrDict(dict):
     def __getattr__(self, item):
         return self.setdefault(item, AttrDict())
 
-
-def cast_to_ad(d):
-    if not isinstance(d, AttrDict):
-        d = AttrDict(d)
-    for k, v in dict(d.items()).items():
-        if " " in k:
-            del d[k]
-            d[k.replace(" ", "_")] = v
-        if isinstance(v, dict):
-            d[k] = cast_to_ad(v)
-    return d
+    @staticmethod
+    def from_dict_recur(d):
+        if not isinstance(d, AttrDict):
+            d = AttrDict(d)
+        for k, v in dict(d.items()).items():
+            if " " in k:
+                del d[k]
+                d[k.replace(" ", "_")] = v
+            if isinstance(v, dict):
+                d[k] = AttrDict.from_dict_recur(v)
+        return d
 
 
 def sizeof_fmt(num, suffix='B'):
@@ -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(' ', ''))\