// server.py

def leds_set(state):
  import paramiko
  ssh = paramiko.SSHClient()
  ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
  ssh.connect('127.0.0.1', username='ahah', password='lol')
  if state:
    state = 'on'
  else:
    state = 'off'
  stdin, stdout, stderr = ssh.exec_command('python /home/ahah/ledson.py ' + state)
  print(stdin, stdout, stderr)
  return dict()

// view.html
{{extend 'layout.html'}}

<form>
<input type="button" onclick="leds_set(True);" value="leds on"/>
<input type="button" onclick="leds_set(False);" value="leds off"/>
</form>

// ledson.py

state = sys.argv[1]

if state =='on':
  print('Leds ON')
else:
  print('Leds OFF')