Fixed python variables

python/server.py

@@ -6,16 +6,16 @@ import serial
 
 app = Flask(__name__)
 
-data = ""
-lock = threading.Lock()
+globals()['data'] = ""
+globals()['lock'] = threading.Lock()
 
 @app.route('/update', methods=['PUT'])
 def update():
   grid = request.json['data']
   grid_string = prepare_grid(grid)
 
-  with lock:
-    data = grid_string
+  with globals()['lock']:
+    globals()['data'] = grid_string
 
   return grid_string
 
@@ -35,10 +35,10 @@ def prepare_grid(grid):
 
 def serial_func():
   with serial.Serial('/dev/ttyACM0', 9600, timeout=1) as ser:
-    with lock:
-      if data != '':
-        serial.write(bytes(data, 'ascii'))
-        data = ''
+    with globals()['lock']:
+      if globals()['data'] != '':
+        serial.write(bytes(globals()['data'], 'ascii'))
+        globals()['data'] = ''
 
 serial_thread = threading.Thread(target=serial_func)
 serial_thread.start()