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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 zoom_in(self):
 """Zooms in by zoom factor"""


        zoom = self.grid.grid_renderer.zoom

        target_zoom = zoom * (1 + config["zoom_factor"])

        if target_zoom < config["maximum_zoom"]:
            self.zoom(target_zoom)