from __future__ import with_statement
from javax.swing import JFrame, JButton

def save(event):
  with open('TEST', 'wb') as f:
    f.write('hello')

with open('TEST2', 'wb') as f:
  f.write('hello')

frame = JFrame(size=(100, 100), defaultCloseOperation=JFrame.EXIT_ON_CLOSE)
button = JButton('Push me', mouseClicked=save)
frame.add(button)
frame.visible = True