Fix frame_size in options

bandwidthmeasure/client.py

@@ -24,7 +24,11 @@ class MemcachedClient(object):
         config = default_config(Client_config)
         config.update(client_params)
         self.params = config
-        self.frame_shape = self.params["request_size"]
+        rs = self.params["request_size"]
+        if isinstance(rs, str):
+            self.frame_shape = tuple(map(int, rs.replace("(", "").replace(")", "").split(",")))
+        else:
+            self.frame_shape = rs
         self.frame_dtype = np.uint16 # TODO custom ?
         self.frame_bytes = np.iinfo(self.frame_dtype).bits //8  * np.prod(self.frame_shape)