ticker process closed when screen turned off

csv/system_info.json

@@ -1 +1 @@
-{"update_available": false, "first_boot": true}
+{"update_available": false, "first_boot": false}

server.py

@@ -33,6 +33,7 @@ api_caller.sendline('A')
 displaying_screensaver = False
 uploading = False
 screensaver_p = None 
+ticker_stopped = False
 professional = json.load(open('csv/display_settings.json', 'r'))[0] == "Professional"
 
 command = 300
@@ -174,12 +175,18 @@ def start():
     global ticker
     global api_caller
     global professional
+    global ticker_stopped
     if displaying_screensaver:
         screensaver_p.close()
         ticker = pexpect.spawn("sudo -E python3 stockTicker.py")
         #api_caller = pexpect.spawn("sudo -E taskset -c 3 python3 api_caller.py")
         api_caller = pexpect.spawn("sudo -E taskset -c 3 python3 database_caller.py")
         displaying_screensaver = False
+        
+    if ticker_stopped:
+        ticker = pexpect.spawn("sudo -E python3 stockTicker.py")
+        ticker_stopped = False
+        
     api_caller.sendline('A')
     
     ticker.sendline('K')
@@ -194,11 +201,21 @@ def stop():
     global ticker
     global api_caller
     global professional
+    global ticker_stopped
+    
+    ticker.sendline('K')
+    
     if not displaying_screensaver:
-        ticker.sendline('K')
+        ticker.close()
     else:
         screensaver_p.close()
         
+    if not ticker_stopped:
+        
+        time.sleep(2) # give time for leds to turn off
+        ticker.close()
+        ticker_stopped = True
+        
      
     if displaying_screensaver:
         screensaver_p.close()
@@ -206,6 +223,7 @@ def stop():
         #api_caller = pexpect.spawn("sudo -E taskset -c 3 python3 api_caller.py")
         api_caller = pexpect.spawn("sudo -E taskset -c 3 python3 database_caller.py")
         displaying_screensaver = False
+        
     return index()
 
 @app.route("/update", methods=['PUT','POST'])