def dragMouseButtonLeft(self, coord, dest_coord, interval=<NUM_LIT:0.5>):
modFlags = <NUM_LIT:0><EOL>self._queueMouseButton(coord, Quartz.kCGMouseButtonLeft, modFlags,<EOL>dest_coord=dest_coord)<EOL>self._postQueuedEvents(interval=interval)<EOL>
Drag the left mouse button without modifiers pressed.

        Parameters: coordinates to click on screen (tuple (x, y))
                    dest coordinates to drag to (tuple (x, y))
                    interval to send event of btn down, drag and up
        Returns: None