---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-10-5820ad2dfff7> in <module>()
      9                       width=1000,
     10                       height=600
---> 11             ).generate(pos_reviews)
     12 
/usr/local/lib/python2.7/dist-packages/wordcloud/wordcloud.pyc in generate(self, text)
    311         """
    312         self.process_text(text)
--> 313         self.fit_words(self.words_)
    314         return self
    315 
/usr/local/lib/python2.7/dist-packages/wordcloud/wordcloud.pyc in fit_words(self, words)
    178             while True:
    179                 # try to find a position
--> 180                 font = ImageFont.truetype(self.font_path, font_size)
    181                 # transpose font optionally
    182                 if random_state.random() < self.prefer_horizontal:
/usr/local/lib/python2.7/dist-packages/PIL/ImageFont.pyc in truetype(font, size, index, encoding, filename)
    226 
    227     try:
--> 228         return FreeTypeFont(font, size, index, encoding)
    229     except IOError:
    230         if sys.platform == "win32":
/usr/local/lib/python2.7/dist-packages/PIL/ImageFont.pyc in __init__(self, font, size, index, encoding, file)
    129 
    130         if isPath(font):
--> 131             self.font = core.getfont(font, size, index, encoding)
    132         else:
    133             self.font_bytes = font.read()
/usr/local/lib/python2.7/dist-packages/PIL/ImageFont.pyc in __getattr__(self, id)
     40     # module placeholder
     41     def __getattr__(self, id):
---> 42         raise ImportError("The _imagingft C module is not installed")
     43 
     44 try:
ImportError: The _imagingft C module is not installed