matplotlib.pyplot 和 wx 使用 python 2.7.10 导入问题

Question

我为一个项目安装了很多库，但是当我尝试导入 python 时，有两个特定的库给我带来了麻烦。这两个是matplotlib.pyplot和wxpython。我已经按照许多教程了解如何将这些软件包正确安装到 python 中，但到目前为止我还没有运气。这是尝试导入时出现的错误：

Traceback (most recent call last):
  File "/Users/AhmedNiri/Ahmed/2D_Mapping_Program_V7.py", line 13, in <module>
    import matplotlib.pyplot as plt
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-macosx-10.9-x86_64.egg/matplotlib/pyplot.py", line 98, in <module>
    _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-macosx-10.9-x86_64.egg/matplotlib/backends/__init__.py", line 28, in pylab_setup
    globals(),locals(),[backend_name],0)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-macosx-10.9-x86_64.egg/matplotlib/backends/backend_wxagg.py", line 6, in <module>
    import backend_wx    # already uses wxversion.ensureMinimal('2.8')
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-macosx-10.9-x86_64.egg/matplotlib/backends/backend_wx.py", line 53, in <module>
    raise ImportError(missingwxversion)
ImportError: Matplotlib backend_wx and backend_wxagg require wxversion, which was not found.

那么我怎么知道这两个库已经正确安装在所需的目录中呢？我知道这可能是一个容易回答的问题，但我已经尝试了一段时间来解决这个问题，而且我在 python 方面也没有太多经验。提前致谢。

Answer 1

问题已解决，解决方法如下。在我安装 wxpython 并使用 "brew install wxpython> install.log 2>error.log" 捕获输出后，我发现安装 wxpython 时它没有正确的目录，它还告诉您如何更改此目录。捕获的输出如下所示：

==> Installing wxpython dependency: wxmac
==> Downloading https://homebrew.bintray.com/bottles/wxmac-3.0.2.yosemite.bottle.10.tar.gz
Already downloaded: /Library/Caches/Homebrew/wxmac-3.0.2.yosemite.bottle.10.tar.gz
==> Pouring wxmac-3.0.2.yosemite.bottle.10.tar.gz
  /usr/local/Cellar/wxmac/3.0.2: 777 files, 41M
==> Installing wxpython
==> Downloading https://homebrew.bintray.com/bottles/wxpython-3.0.2.0.yosemite.bottle.tar.gz
Already downloaded: /Library/Caches/Homebrew/wxpython-3.0.2.0.yosemite.bottle.tar.gz
==> Pouring wxpython-3.0.2.0.yosemite.bottle.tar.gz
    ==> Caveats

Python modules have been installed and Homebrew's site-packages is not
in your Python sys.path, so you will not be able to import the modules
this formula installed. If you plan to develop with these modules,
please run:
  mkdir -p /Users/AhmedNiri/Library/Python/2.7/lib/python/site-packages
  echo 'import site; site.addsitedir("/usr/local/lib/python2.7/site-packages")' >> /Users/AhmedNiri/Library/Python/2.7/lib/python/site-packages/homebrew.pth
==> Summary
  /usr/local/Cellar/wxpython/3.0.2.0: 944 files, 38M

因此，如果您查看上面的执行，您可以看到：

   Python modules have been installed and Homebrew's site-packages is not
    in your Python sys.path, so you will not be able to import the modules
    this formula installed. If you plan to develop with these modules,
    please run:
      mkdir -p /Users/AhmedNiri/Library/Python/2.7/lib/python/site-packages
      echo 'import site; site.addsitedir("/usr/local/lib/python2.7/site-packages")' >> /Users/AhmedNiri/Library/Python/2.7/lib/python/site-packages/homebrew.pth

这是用来解决问题的部分。我希望这可以帮助其他人，我要感谢@JoranBeasley 的帮助。

matplotlib.pyplot 和 wx 使用 python 2.7.10 导入问题

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