Removed function argument

app.py

@@ -31,7 +31,7 @@ def main():
 
 # The function below is executed when someone requests a URL with the pin number and action in it:
 @app.route("/<change_pin>")
-def action(change_pin, action):
+def action(change_pin):
     change_pin = int(change_pin)
     device_name = pins[change_pin]['name']
     print("Input value before change: " + str(GPIO.input(change_pin)))