>>> image_file = cbook.get_sample_data('grace_hopper.png')
>>> image = plt.imread(image_file)

---------------------------------------------------------------------------
FileNotFoundError                         Traceback (most recent call last)
<ipython-input-1-dd6f8285e5f3> in <module>()
      4 
      5 
----> 6 image_file = cbook.get_sample_data('grace_hopper.png')
      7 image = plt.imread(image_file)
      8 

/home/atcold/anaconda3/lib/python3.5/site-packages/matplotlib/cbook.py in get_sample_data(fname, asfileobj)
    831             return gzip.open(path, mode)
    832         else:
--> 833             return open(path, mode)
    834     else:
    835         return path

FileNotFoundError: [Errno 2] No such file or directory: '/home/atcold/anaconda3/lib/python3.5/site-packages/matplotlib/mpl-data/sample_data/grace_hopper.png'