In [1]: import matplotlib.style as style
In [2]: style.available
Out[2]:
['Solarize_Light2',
 '_classic_test_patch',
 'bmh',
 'classic',
 'dark_background',
 'fast',
 'fivethirtyeight',
 'ggplot',
 'grayscale',
 'seaborn',
 'seaborn-bright',
 'seaborn-colorblind',
 'seaborn-dark',
 'seaborn-dark-palette',
 'seaborn-darkgrid',
 'seaborn-deep',
 'seaborn-muted',
 'seaborn-notebook',
 'seaborn-paper',
 'seaborn-pastel',
 'seaborn-poster',
 'seaborn-talk',
 'seaborn-ticks',
 'seaborn-white',
 'seaborn-whitegrid',
 'tableau-colorblind10']

In [6]: style.library['fast']
Out[6]:
RcParams({'agg.path.chunksize': 10000,
     'path.simplify': True,
     'path.simplify_threshold': 1.0})

import matplotlib.pyplot as plt
plt.bar([1,2,3],[1,2,3])
plt.show()

import matplotlib.pyplot as plt
plt.style.use('ggplot')
plt.bar([1,2,3],[1,2,3])
plt.show()

import matplotlib.pyplot as plt
plt.style.use(['ggplot','dark_background'])
plt.bar([1,2,3],[1,2,3])
plt.show()

import matplotlib.pyplot as plt
plt.subplot(221)
plt.bar([1,2,3],[1,2,3])
plt.style.use('ggplot')
plt.subplot(222)
plt.bar([1,2,3],[1,2,3])
plt.style.use('grayscale')
plt.subplot(223)
plt.bar([1,2,3],[1,2,3])
plt.style.use(['ggplot','grayscale'])
plt.subplot(224)
plt.bar([1,2,3],[1,2,3])
plt.show()