matplotlib 画图风格

import matplotlib.style as mstyle
print mstyle.available
plt.style.use('seaborn-darkgrid')

可选风格：

seaborn-darkgrid
seaborn-notebook
classic
seaborn-ticks
grayscale
bmh
seaborn-talk
dark_background
ggplot
fivethirtyeight
seaborn-colorblind
seaborn-deep
seaborn-whitegrid
seaborn-bright
seaborn-poster
seaborn-muted
seaborn-paper
seaborn-white
seaborn-pastel
seaborn-dark
seaborn-dark-palette