def hue_pal(h=.01, l=.6, s=.65, color_space='hls'):
"""
Utility for making hue palettes for color schemes.
Parameters
----------
h : float
first hue. In the [0, 1] range
l : float
lightness. In the [0, 1] range
s : float
saturation. In the [0, 1] range
color_space : 'hls' | 'husl'
Color space to use for the palette
Returns
-------
out : function
Continuous color palette that takes a single
:class:`int` parameter ``n`` and returns ``n``
equally spaced colors. Though the palette
is continuous, since it is varies the hue it
is good for categorical data. However if ``n``
is large enough the colors show continuity.
>>> hue_pal()(5)
['#db5f57', '#b9db57', '#57db94', '#5784db', '#c957db']
>>> hue_pal(color_space='husl')(5)
['#e0697e', '#9b9054', '#569d79', '#5b98ab', '#b675d7']
"""
if not all([0 <= val <= 1 for val in (h, l, s)]):
msg = ("hue_pal expects values to be between 0 and 1. "
" I got h={}, l={}, s={}".format(h, l, s))
raise ValueError(msg)
if color_space not in ('hls', 'husl'):
msg = "color_space should be one of ['hls', 'husl']"
raise ValueError(msg)
name = '{}_palette'.format(color_space)
palette = globals()[name]
def _hue_pal(n):
colors = palette(n, h=h, l=l, s=s)
return [mcolors.rgb2hex(c) for c in colors]
return _hue_pal
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