Python 导入错误：安装 matplotlib 时没有名为 pkg_resources 的模块
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ImportError: No module named pkg_resources on installing matplotlib
提问by nikosd
This is on CentOs 6.6. I am trying to set up a scientific python environment. I want to avoid Anaconda. When trying to install matplotlib, I get "ImportError: No module named pkg_resources". Full install history:
这是在 CentOs 6.6 上。我正在尝试建立一个科学的 python 环境。我想避免使用 Anaconda。尝试安装 matplotlib 时，出现“ImportError: No module named pkg_resources”。完整的安装历史：
sudo yum install gcc-c++.x86_64
sudo yum install gcc
sudo yum install atlas atlas-devel lapack-devel blas-devel
sudo yum install python-devel
sudo pip install numpy
sudo pip install scipy
sudo pip install pandas
sudo pip install matplotlib
At the last step, I get the message
在最后一步，我收到消息
Complete output from command python setup.py egg_info:
The required version of distribute (>=0.6.28) is not available,
and can't be installed while this script is running. Please
install a more recent version first, using
'easy_install -U distribute'.
Then I do
然后我做
sudo pip install --upgrade distribute
which installs distribute-0.7.3, setuptools-18.0.1. Then:
安装distribute-0.7.3, setuptools-18.0.1. 然后：
sudo pip install matplotlib
which results in:
这导致：
File "/usr/bin/pip", line 5, in <module>
from pkg_resources import load_entry_point
ImportError: No module named pkg_resources
Any ideas?
有任何想法吗？
Update
更新
After the above steps, setuptoolsand pipare broken in this installation. From a python shell, doing help()followed by modulesdoes not list setuptools. A search in the filesystem for setuptoolsdirectories reveals:
经过以上步骤，setuptools并pip在此安装打破。在 python shell 中，执行help()后跟modules不列出setuptools. 在文件系统中搜索setuptools目录显示：
/usr/lib/python2.6/site-packages/setuptools-18.0.1.dist-info/
while the setuptools.pthfile in /usr/lib/python2.6/site-packages/contains a pointer to the non-existent ./setuptools-0.6c11-py2.6.egg-info.
而setuptools.pth文件 in/usr/lib/python2.6/site-packages/包含一个指向不存在的./setuptools-0.6c11-py2.6.egg-info.
At the same time, there is a directory
同时，还有一个目录
/usr/share/doc/python-setuptools-0.6.10/
After all this, pip no longer works.
毕竟，pip不再有效。
回答by Pavan Kumar N
Try this for OS supporting apt-get (Ubuntu etc)
试试这个支持 apt-get 的操作系统（Ubuntu 等）
sudo apt-get install python-pkg-resources python-setuptools --reinstall
sudo apt-get install python-pkg-resources python-setuptools --reinstall
回答by user41734
@pavan they said CentOS, so apt is unlikely to help them.
@pavan 他们说 CentOS，所以 apt 不太可能帮助他们。
They could, though, do :
不过，他们可以：
yum remove python-setuptools
yum install python-setuptools
(my also need to reinstall pip: yum install python-pip )
（我还需要重新安装 pip： yum install python-pip ）
And that might fix the problem.
这可能会解决问题。
回答by user6868762
Try install python-pip (and dependencies):
尝试安装 python-pip（和依赖项）：
yum install python-pip
This solved my problem (Centos release 6.8).
这解决了我的问题（Centos 6.8 版）。
