关于python：matplotlib中文本的部分着色

Partial coloring of text in matplotlib

matplotlib中是否有方法部分指定字符串的颜色？

例子：

1	plt.ylabel("Today is cloudy.")

我怎么能把"今天"显示为红色，"今天"显示为绿色，"今天"显示为多云，"今天"显示为蓝色？

谢谢。

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这是交互式版本(和我在列表中发布的版本相同)

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import matplotlib.pyplot as plt
from matplotlib import transforms

def rainbow_text(x,y,ls,lc,**kw):
"""
Take a list of strings ``ls`` and colors ``lc`` and place them next to each
other, with text ls[i] being shown in color lc[i].

This example shows how to do both vertical and horizontal text, and will
pass all keyword arguments to plt.text, so you can set the font size,
family, etc.
"""
t = plt.gca().transData
fig = plt.gcf()
plt.show()

#horizontal version
for s,c in zip(ls,lc):
text = plt.text(x,y,""+s+"",color=c, transform=t, **kw)
text.draw(fig.canvas.get_renderer())
ex = text.get_window_extent()
t = transforms.offset_copy(text._transform, x=ex.width, units='dots')

#vertical version
for s,c in zip(ls,lc):
text = plt.text(x,y,""+s+"",color=c, transform=t,
rotation=90,va='bottom',ha='center',**kw)
text.draw(fig.canvas.get_renderer())
ex = text.get_window_extent()
t = transforms.offset_copy(text._transform, y=ex.height, units='dots')

plt.figure()
rainbow_text(0.5,0.5,"all unicorns poop rainbows ! ! !".split(),
['red', 'orange', 'brown', 'green', 'blue', 'purple', 'black'],
size=40)

all unicorns poop rainbows

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扩展Yann的答案，乳胶着色现在也可以与PDF导出一起使用：

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import matplotlib
from matplotlib.backends.backend_pgf import FigureCanvasPgf
matplotlib.backend_bases.register_backend('pdf', FigureCanvasPgf)

import matplotlib.pyplot as plt

pgf_with_latex = {
"text.usetex": True, # use LaTeX to write all text
"pgf.rcfonts": False, # Ignore Matplotlibrc
"pgf.preamble": [
r'\usepackage{color}' # xcolor for colours
]
}
matplotlib.rcParams.update(pgf_with_latex)

plt.figure()
plt.ylabel(r'\textcolor{red}{Today} '+
r'\textcolor{green}{is} '+
r'\textcolor{blue}{cloudy.}')
plt.savefig("test.pdf")

注意，这个python脚本在第一次尝试时有时会出现Undefined control sequence错误。再次运行是成功的。