Function _sanitize_extrema

lib/matplotlib/colors.py:209–216

(ex)

def _sanitize_extrema(ex):
    if ex is None:
        return ex
    try:
        ret = ex.item()
    except AttributeError:
        ret = float(ex)
    return ret

_nth_color_re = re.compile(r"\AC[0-9]+\Z")