def pop(self, i = len(WINDOWS_STACK)-1):
window = WINDOWS_STACK.pop(i)
window.close()
del window
def pop(self, i=len(WINDOWS_STACK) - 1):
window = WINDOWS_STACK.pop(i)
window.close()
del window
def append(self, var):
WINDOWS_STACK.append(var)
def append(self, var):
WINDOWS_STACK.append(var)
