Merge pull request arrow-py#250 from beenje/static

Cleanup class methods definition. Good clenups

arrow/arrow.py

@@ -828,8 +828,8 @@ def for_json(self):
 
     # internal tools.
 
-    @classmethod
-    def _get_tzinfo(cls, tz_expr):
+    @staticmethod
+    def _get_tzinfo(tz_expr):
 
         if tz_expr is None:
             return dateutil_tz.tzutc()
@@ -882,8 +882,8 @@ def _get_iteration_params(cls, end, limit):
         else:
             return end, sys.maxsize
 
-    @classmethod
-    def _get_timestamp_from_input(cls, timestamp):
+    @staticmethod
+    def _get_timestamp_from_input(timestamp):
 
         try:
             return float(timestamp)

arrow/parser.py

@@ -205,8 +205,8 @@ def _parse_token(self, token, value, parts):
             ):
                 parts['am_pm'] = 'pm'
 
-    @classmethod
-    def _build_datetime(cls, parts):
+    @staticmethod
+    def _build_datetime(parts):
 
         timestamp = parts.get('timestamp')
 
@@ -243,24 +243,24 @@ def _parse_multiformat(self, string, formats):
 
         return _datetime
 
-    @classmethod
-    def _map_lookup(cls, input_map, key):
+    @staticmethod
+    def _map_lookup(input_map, key):
 
         try:
             return input_map[key]
         except KeyError:
             raise ParserError('Could not match "{0}" to {1}'.format(key, input_map))
 
-    @classmethod
-    def _try_timestamp(cls, string):
+    @staticmethod
+    def _try_timestamp(string):
 
         try:
             return float(string)
         except:
             return None
 
-    @classmethod
-    def _choice_re(cls, choices, flags=0):
+    @staticmethod
+    def _choice_re(choices, flags=0):
         return re.compile('({0})'.format('|'.join(choices)), flags=flags)