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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def our_IsUsableForDesktopGUI(m):
 """ A more leniant version of CGDisplayModeIsUsableForDesktopGUI """

        if guess_bitDepth(Q.CGDisplayModeCopyPixelEncoding(m)) != 24:
                return False
        if Q.CGDisplayModeGetWidth(m) < 640:
                return False
        if Q.CGDisplayModeGetHeight(m) < 480:
                return False
        return True