RPi GPIO Flashing LED

[gontajones]

I think you'll have to start a Thread in swLed() that could trigger a while loop to blink the LED (if button is pressed [ON]).
If the press button is OFF you'll have to set a "global stop variable" (keep_blinking = False) to break the blink LED loop.

def my_thread_function():
    led_state = 1
    while keep_blinking:
        GPIO.output(LedPin, led_state)
        led_state = not led_state
        time.sleep(0.1)