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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 __class_docstring_signature(mcs, max_repr_len=15):
 """ Autogenerate a keyword signature in the class docstring for all available parameters. This is particularly useful in the IPython Notebook as IPython will parse this signature to allow tab-completion of keywords. max_repr_len: Maximum length (in characters) of value reprs. """

        processed_kws, keyword_groups = set(), []
        for cls in reversed(mcs.mro()):
            keyword_group = []
            for (k,v) in sorted(cls.__dict__.items()):
                if isinstance(v, Parameter) and k not in processed_kws:
                    param_type = v.__class__.__name__
                    keyword_group.append("%s=%s" % (k, param_type))
                    processed_kws.add(k)
            keyword_groups.append(keyword_group)

        keywords = [el for grp in reversed(keyword_groups) for el in grp]
        class_docstr = "\n"+mcs.__doc__ if mcs.__doc__ else ''
        signature = "params(%s)" % (", ".join(keywords))
        description = param_pager(mcs) if (docstring_describe_params and param_pager) else ''
        mcs.__doc__ = signature + class_docstr + '\n' + description