PYW not working

Question

I made a python script that would simple take and save a screenshot when ran. In the tutorial it said if I changed the file extension to .pyw it would still save a screenshot but it is not working. What might I be overlooking? I have it defaulted to run through pythonw and tried running it thought both programs on 2.7 and 3.6

    from PIL  import ImageGrab
    import os
    import time

    x_pad = 69
    y_pad = 23

    def screenGrab():
        box = (x_pad+1,y_pad+1,x_pad+1531,y_pad+877)
        im = ImageGrab.grab(    im.save(os.getcwd() + '\\screenshot' + str(int(time.time())) +
        '.png', 'PNG')box)

    def main():
        screenGrab()

    if __name__ == '__main__':
        main()