diff --git a/plugins/task_manager/task_manager_index.py b/plugins/task_manager/task_manager_index.py
index 7ef9c511c..d4c3fa8fa 100755
--- a/plugins/task_manager/task_manager_index.py
+++ b/plugins/task_manager/task_manager_index.py
@@ -409,16 +409,12 @@ class mainClass(object):
             return self.__process_net_list[pid]['up'], self.__process_net_list[pid]['up_package'], \
                 self.__process_net_list[pid]['down'], self.__process_net_list[pid]['down_package']
 
+        now_t = time.time()
         # print(pid, self.__process_net_list[pid]['up'], self.last_net_process[pid]['up'],time.time(),self.last_net_process_time)
-        up = int((self.__process_net_list[pid]['up'] - self.last_net_process[pid]['up']) / (
-                time.time() - self.last_net_process_time))
-        down = int((self.__process_net_list[pid]['down'] - self.last_net_process[pid]['down']) / (
-                time.time() - self.last_net_process_time))
-        up_package = int((self.__process_net_list[pid]['up_package'] - self.last_net_process[pid]['up_package']) / (
-                time.time() - self.last_net_process_time))
-        down_package = int(
-            (self.__process_net_list[pid]['down_package'] - self.last_net_process[pid]['down_package']) / (
-                    time.time() - self.last_net_process_time))
+        up = int((self.__process_net_list[pid]['up'] - self.last_net_process[pid]['up']) / ( now_t - self.last_net_process_time))
+        down = int((self.__process_net_list[pid]['down'] - self.last_net_process[pid]['down']) / ( now_t - self.last_net_process_time))
+        up_package = int((self.__process_net_list[pid]['up_package'] - self.last_net_process[pid]['up_package']) / ( now_t - self.last_net_process_time))
+        down_package = int((self.__process_net_list[pid]['down_package'] - self.last_net_process[pid]['down_package']) / (now_t - self.last_net_process_time))
         # print('get_process_network', up, up_package, down, down_package)
         return up, up_package, down, down_package