def test_erfinv(): from scipy import stats as sstats chart = Line(show_dots=False) chart.add('scipy', [sstats.norm.ppf(x / 1000) for x in range(1, 999)]) chart.add('approx', [stats.ppf(x / 1000) for x in range(1, 999)]) # chart.add('approx', [ # special.erfinv(x/1000) - erfinv(x/1000) # for x in range(-999, 1000)]) return chart.render_response()