通过pip安装pysftp失败(因为2个python2.x版本?)

Question

我的Ubuntu 10.04附带了Python 2.6。现在，我还安装了Python2.7，这是系统默认设置，因为当我从终端启动python时，它会启动python2.7。

现在，我想使用pip安装库pysftp，但我很难做到。下面是我的一些尝试和结论。我做了pip install pysftp，但上面写着：

Downloading/unpacking pysftp
  Running setup.py egg_info for package pysftp
    Traceback (most recent call last):
      File "<string>", line 3, in <module>
      File "/usr/local/lib/python2.6/dist-packages/setuptools/__init__.py", line 12, in <module>
        from setuptools.extension import Extension
      File "/usr/local/lib/python2.6/dist-packages/setuptools/extension.py", line 8, in <module>
        from .dist import _get_unpatched
      File "/usr/local/lib/python2.6/dist-packages/setuptools/dist.py", line 21, in <module>
        packaging = pkg_resources.packaging
    AttributeError: 'module' object has no attribute 'packaging'
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
  File "<string>", line 3, in <module>
  File "/usr/local/lib/python2.6/dist-packages/setuptools/__init__.py", line 12, in <module>
    from setuptools.extension import Extension
  File "/usr/local/lib/python2.6/dist-packages/setuptools/extension.py", line 8, in <module>
    from .dist import _get_unpatched
  File "/usr/local/lib/python2.6/dist-packages/setuptools/dist.py", line 21, in <module>
    packaging = pkg_resources.packaging
AttributeError: 'module' object has no attribute 'packaging'
----------------------------------------
Command python setup.py egg_info failed with error code 1
Storing complete log in ./pip-log.txt

在我看来，pip（显然是在安装Python 2.7之前安装的）链接到旧版本的Python，该版本不支持pysftp。还因为当我做pip --version时，它说：

pip 0.3.1 from /usr/lib/python2.6/dist-packages (python 2.6)

当我执行whereis python时，它会给我以下信息：

python: /usr/src/Python-2.7.10/python /usr/bin/python2.6 /usr/bin/python /etc/python2.6 /etc/python /usr/lib/python2.6 /usr/lib/python3.1 /usr/lib64/python2.6 /usr/lib64/python3.1 /usr/local/bin/python2.7-config /usr/local/bin/python /usr/local/bin/python2.7 /usr/local/lib/python2.6 /usr/local/lib/python2.7 /usr/include/python2.6 /usr/share/python /usr/share/man/man1/python.1.gz

如何安装pysftp？

Answer 1

您需要为Python 2.7重新安装pip，然后运行pip2.7 install pysftp。您需要为要与之一起使用的每个版本的Python安装pip。setuptools软件包可能是最简单的方法；你可以简单地运行以下操作，一下子完成所有操作：

wget https://bootstrap.pypa.io/ez_setup.py -O --no-check-certificate - | sudo python2.7 && sudo easy_install-2.7 pip && sudo pip2.7 install pysftp

有时，由于通过ez_setup.py下载完整的setuptools软件包时遇到"无效"证书，较旧的Linux安装程序会出现上述命令的问题（有关更多详细信息，请参阅此处）。这可以通过这个替代的一次突袭命令来规避：

wget https://pypi.python.org/packages/source/s/setuptools/setuptools-18.8.1.zip --no-check-certificate && unzip setuptools-18.8.1.zip && cd setuptools-18.8.1 && sudo python setup.py install && sudo easy_install-2.7 pip && sudo pip2.7 install pysftp

Answer 2

我认为您需要使用代码安装某种"必需品包"

sudo apt-get install build-essential libssl-dev libffi-dev python-dev

然后你可以安装：

sudo pip install pysftp
sudo pip install enum