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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 follow(self, object):
        '''follow an object on the map'''
        state = self.state
        (px,py) = state.panel.pixmapper(object.latlon)
        ratio = 0.25
        if (px > ratio*state.width and
            px < (1.0-ratio)*state.width and
            py > ratio*state.height and
            py < (1.0-ratio)*state.height):
            # we're in the mid part of the map already, don't move
            return

        if not state.follow:
            # the user has disabled following
            return

        (lat, lon) = object.latlon
        state.panel.re_center(state.width/2, state.height/2, lat, lon)