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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 filled_hist(ax, edges, values, bottoms=None, orientation='v', **kwargs):
 """ Draw a histogram as a stepped patch. Extra kwargs are passed through to `fill_between` Parameters ax : Axes The axes to plot to edges : array A length n+1 array giving the left edges of each bin and the right edge of the last bin. values : array A length n array of bin counts or values bottoms : scalar or array, optional A length n array of the bottom of the bars. If None, zero is used. orientation : {'v', 'h'} Orientation of the histogram. 'v' (default) has the bars increasing in the positive y-direction. Returns ------- ret : PolyCollection Artist added to the Axes """

    print(orientation)
    if orientation not in set('hv'):
        raise ValueError("orientation must be in {{'h', 'v'}} "
                         "not {o}".format(o=orientation))

    kwargs.setdefault('step', 'post')
    edges = np.asarray(edges)
    values = np.asarray(values)
    if len(edges) - 1 != len(values):
        raise ValueError('Must provide one more bin edge than value not: '
                         'len(edges): {lb} len(values): {lv}'.format(
                             lb=len(edges), lv=len(values)))

    if bottoms is None:
        bottoms = np.zeros_like(values)
    if np.isscalar(bottoms):
        bottoms = np.ones_like(values) * bottoms

    values = np.r_[values, values[-1]]
    bottoms = np.r_[bottoms, bottoms[-1]]
    if orientation == 'h':
        return ax.fill_betweenx(edges, values, bottoms,
                                **kwargs)
    elif orientation == 'v':
        return ax.fill_between(edges, values, bottoms,
                               **kwargs)
    else:
        raise AssertionError("you should never be here")