C:\portabel\miniconda\envs\katins2\lib\site-packages\matplotlib\__init__.py:1355: UserWarning:  This call to matplotlib.use() has no effect
because the backend has already been chosen;
matplotlib.use() must be called *before* pylab, matplotlib.pyplot,
or matplotlib.backends is imported for the first time.

  warnings.warn(_use_error_msg)
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-3-1fdbaaa8856e> in <module>()
      2 import matplotlib as mpl
      3 mpl.use('Agg')
----> 4 import matplotlib.pyplot as plt
      5 import matplotlib.animation as animation
      6 def updatefig(i):

C:\portabel\miniconda\envs\katins2\lib\site-packages\matplotlib\pyplot.py in <module>()
    112 
    113 from matplotlib.backends import pylab_setup
--> 114 _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()
    115 
    116 _IP_REGISTERED = None

C:\portabel\miniconda\envs\katins2\lib\site-packages\matplotlib\backends\__init__.pyc in pylab_setup()
     30     # imports. 0 means only perform absolute imports.
     31     backend_mod = __import__(backend_name,
---> 32                              globals(),locals(),[backend_name],0)
     33 
     34     # Things we pull in from all backends

C:\portabel\miniconda\envs\katins2\lib\site-packages\matplotlib\backends\backend_nbagg.py in <module>()
     12 from uuid import uuid4 as uuid
     13 
---> 14 import tornado.ioloop
     15 
     16 from IPython.display import display, Javascript, HTML

ImportError: No module named tornado.ioloop