导入matplotlib做n

Question

在终端窗口中，我打开ipython环境，然后输入import matplotlib.pyplot as plt。我从中得到的错误消息是：

ImportError                               Traceback (most recent call last)
<ipython-input-1-eff513f636fd> in <module>()
----> 1 import matplotlib.pyplot as plt

/Users/arazipinhas/anaconda/lib/python2.7/site-packages/matplotlib/pyplot.py in <module>()
     25 
     26 import matplotlib
---> 27 import matplotlib.colorbar
     28 from matplotlib import style
     29 from matplotlib import _pylab_helpers, interactive

/Users/arazipinhas/anaconda/lib/python2.7/site-packages/matplotlib/colorbar.py in <module>()
     32 import matplotlib.artist as martist
     33 import matplotlib.cbook as cbook
---> 34 import matplotlib.collections as collections
     35 import matplotlib.colors as colors
     36 import matplotlib.contour as contour

/Users/arazipinhas/anaconda/lib/python2.7/site-packages/matplotlib/collections.py in <module>()
     25 import matplotlib.artist as artist
     26 from matplotlib.artist import allow_rasterization
---> 27 import matplotlib.backend_bases as backend_bases
     28 import matplotlib.path as mpath
     29 from matplotlib import _path

/Users/arazipinhas/anaconda/lib/python2.7/site-packages/matplotlib/backend_bases.py in <module>()
     54 
     55 import matplotlib.tight_bbox as tight_bbox
---> 56 import matplotlib.textpath as textpath
     57 from matplotlib.path import Path
     58 from matplotlib.cbook import mplDeprecation

/Users/arazipinhas/anaconda/lib/python2.7/site-packages/matplotlib/textpath.py in <module>()
     20 from matplotlib.ft2font import FT2Font, KERNING_DEFAULT, LOAD_NO_HINTING
     21 from matplotlib.ft2font import LOAD_TARGET_LIGHT
---> 22 from matplotlib.mathtext import MathTextParser
     23 import matplotlib.dviread as dviread
     24 from matplotlib.font_manager import FontProperties

/Users/arazipinhas/anaconda/lib/python2.7/site-packages/matplotlib/mathtext.py in <module>()
     61 
     62 import matplotlib.colors as mcolors
---> 63 import matplotlib._png as _png
     64 ####################
     65 

ImportError: dlopen(/Users/arazipinhas/anaconda/lib/python2.7/site-packages/matplotlib/_png.so, 2): Library not loaded: @loader_path/../../../libpng15.15.dylib
  Referenced from: /Users/arazipinhas/anaconda/lib/python2.7/site-packages/matplotlib/_png.so
  Reason: image not found

如果能找到解决这个问题的办法，我将不胜感激。我只想继续我的物理，所有这些不断的计算挫折是相当麻烦和恼人的。因此，我将感谢任何愿意提供协助的人迅速作出反应。在

Answer 1

ImportError: dlopen(/Users/arazipinhas/anaconda/lib/python2.7/site-packages/matplotlib/_png.so, 2):
Library not loaded: @loader_path/../../../libpng15.15.dylib

非常简单：matplotlib与libpng15链接，但运行时找不到。所以你可以搜索那个文件，libpng15.15.dylib。 如果缺少，则说明安装不完整，并且可能缺少用于构建matplotlib的libPNG版本。在

Answer 2

Continuum最近更新了libpng，这导致了这种破坏。很抱歉给您带来不便。在

解决此错误的方法是在终端中运行

conda update qt
conda update matplotlib