Matplotlib导入错误ft2font

Question

我在具有Ipython版本2.1.0的64位Mac上的Canopy下安装了Python 2.7.6。 这是一个很奇怪的问题，我不确定这是否是路径文件问题。 每当我导入matplotlib.pyplot（不仅是matplotlib）时，都会收到以下错误：

In [2]: import matplotlib.pyplot as plt
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-2-eff513f636fd> in <module>()
----> 1 import matplotlib.pyplot as plt

/Users/rpatel/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/pyplot.py in <module>()
     22 
     23 import matplotlib
---> 24 import matplotlib.colorbar
     25 from matplotlib import _pylab_helpers, interactive
     26 from matplotlib.cbook import dedent, silent_list, is_string_like, is_numlike

/Users/rpatel/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/colorbar.py in <module>()
     27 import matplotlib.artist as martist
     28 import matplotlib.cbook as cbook
---> 29 import matplotlib.collections as collections
     30 import matplotlib.colors as colors
     31 import matplotlib.contour as contour

/Users/rpatel/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/collections.py in <module>()
     21 import matplotlib.artist as artist
     22 from matplotlib.artist import allow_rasterization
---> 23 import matplotlib.backend_bases as backend_bases
     24 import matplotlib.path as mpath
     25 from matplotlib import _path

/Users/rpatel/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/backend_bases.py in <module>()
     48 
     49 import matplotlib.tight_bbox as tight_bbox
---> 50 import matplotlib.textpath as textpath
     51 from matplotlib.path import Path
     52 from matplotlib.cbook import mplDeprecation

/Users/rpatel/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/textpath.py in <module>()
      9 from matplotlib.path import Path
     10 from matplotlib import rcParams
---> 11 import matplotlib.font_manager as font_manager
     12 from matplotlib.ft2font import FT2Font, KERNING_DEFAULT, LOAD_NO_HINTING
     13 from matplotlib.ft2font import LOAD_TARGET_LIGHT

/Users/rpatel/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/font_manager.py in <module>()
     51 import matplotlib
     52 from matplotlib import afm
---> 53 from matplotlib import ft2font
     54 from matplotlib import rcParams, get_cachedir
     55 from matplotlib.cbook import is_string_like

ImportError: dlopen(/Users/rpatel/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/ft2font.so, 2): Symbol not found: _inflateReset2
  Referenced from: /Users/rpatel/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/../../../../lib/libpng16.dylib
  Expected in: /usr/lib/libz.1.dylib
 in /Users/rpatel/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/../../../../lib/libpng16.dylib

我似乎无法弄清缺少的东西或需要安装的东西。 Matplotlib来自冠层分布，因此我可以假定它已正确安装。

Answer 1

我遇到了同样的问题，并向Enthought提交了一个请求，以寻求帮助，并得到了以下解决方案（乔纳森·马奇（Jonathan March）发表了上述评论）。

在“ Canopy工具”菜单中，打开“ Canopy终端”窗口并调用：

enpkg --no-deps matplotlib 1.2.1
enpkg --no-deps libpng 1.2.40
enpkg --no-deps freetype 2.4.4

显然，至少对于我而言，问题是matplotlib 1.3引用了不在OS X 10.6中的库。 因此，解决方法是降级matplotlib。