Make methods static where it's possible

Change-Id: I09baf6491c84a5d4d6e3ab1261d474f7811e32d6

opentsdbclient/base.py

@@ -66,7 +66,8 @@ class BaseOpenTSDBClient(object):
         """
         raise NotImplementedError
 
-    def _check_meters(self, meters):
+    @staticmethod
+    def _check_meters(meters):
         """Check that meters to be put are having nice format."""
         if type(meters) == dict:
             meters = [meters]

opentsdbclient/rest/client.py

@@ -101,7 +101,8 @@ class RESTOpenTSDBClient(base.BaseOpenTSDBClient):
     def get_query(self, query):
         return self._make_query(query, 'get')
 
-    def process_response(self, resp):
+    @staticmethod
+    def process_response(resp):
         try:
             res = json.loads(resp.text)
         except Exception:

opentsdbclient/socket/client.py

@@ -199,7 +199,8 @@ class SocketOpenTSDBClient(base.BaseOpenTSDBClient):
                           'has been collected' % self.max_uncaught_exceptions)
             raise
 
-    def compose_line_from_meter(self, m_dict):
+    @staticmethod
+    def compose_line_from_meter(m_dict):
         meter_dict = copy.deepcopy(m_dict)
         tags = meter_dict.pop('tags')
         tags_str = ''.join(' %s=%s' % (k, v) for k, v in six.iteritems(tags))