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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 show(self, imgs, ax=None):
 """ Visualize the persistence image """


        ax = ax or plt.gca()

        if type(imgs) is not list:
            imgs = [imgs]

        for i, img in enumerate(imgs):
            ax.imshow(img, cmap=plt.get_cmap("plasma"))
            ax.axis("off")