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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 cmd_dist(self, nm=None, ch=None):
 """dist nm=dist_name ch=chname Set a color distribution for the given channel. Possible values are linear, log, power, sqrt, squared, asinh, sinh, and histeq. If no value is given, reports the current color distribution algorithm. """

        viewer = self.get_viewer(ch)
        if viewer is None:
            self.log("No current viewer/channel.")
            return

        if nm is None:
            rgbmap = viewer.get_rgbmap()
            dist = rgbmap.get_dist()
            self.log(str(dist))
        else:
            viewer.set_color_algorithm(nm)