drop old json import

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/branches/fork@1480 b32b6428-25c9-4566-ad07-03861ab6144f

apps/tools/xaal/tools/isalive.py

@@ -19,8 +19,8 @@
 
 from xaal.lib import Engine, Device, tools, config
 
-import json
 import sys
+import time
 
 logger = tools.get_logger("isalive",'DEBUG')
 class Scanner:
@@ -42,7 +42,6 @@ class Scanner:
     def query(self,devtype='any.any'):
         self.devtype = devtype
         self.seen = []
-        self.timer = 0
 
         print("[%s] Sending xAAL isAlive [%s]" % (self.addr,self.devtype))
         self.eng.send_isAlive(self.dev,[self.devtype,])
@@ -52,17 +51,16 @@ class Scanner:
         print("="*70)        
 
     def loop(self):
+        t0 = time.time()
         while 1:
             self.eng.loop()
-            if self.timer > 50:
+            if time.time() > (t0 + 1):
                 break
-            self.timer += 1
-
             
     def parse_answer(self,msg):
         if (msg.msgtype == 'notify'):
             if msg.action == 'alive':
-                if msg.source == self.addr:return
+                if msg.source == self.addr:return #hidding myself
                 if msg.source not in self.seen:
                     print("%s : %s" % (msg.source,msg.devtype))
                     self.seen.append(msg.source)