安装google-cloud-vision

Question

我对raspberry pi、google cloud、python是个新手，对linux也有些陌生，我想要一个关于如何修复/调试这个问题的建议。安装Cloud Vision API Client Libraries for python时出现错误。

这个安装似乎破坏了raspian上的pip和pip3。下面是我是如何从新安装的raspian中重现这个问题的：

pi@raspberrypi:~ $ pip --version
pip 1.5.6 from /usr/lib/python2.7/dist-packages (python 2.7)
pi@raspberrypi:~ $
pi@raspberrypi:~ $ sudo pip install --upgrade google-cloud-vision
...
... 
At the end of the log:

  Running setup.py install for dill
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/usr/local/lib/python2.7/dist-packages/setuptools/__init__.py", line 12, in <module>
        import setuptools.version
      File "/usr/local/lib/python2.7/dist-packages/setuptools/version.py", line 1, in <module>
        import pkg_resources
      File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 70, in <module>
        import packaging.version
    ImportError: No module named packaging.version
    Complete output from command /usr/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip-build-1dbzT3/dill/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-lUJmAy-record/install-record.txt --single-version-externally-managed --compile:
    Traceback (most recent call last):

  File "<string>", line 1, in <module>

  File "/usr/local/lib/python2.7/dist-packages/setuptools/__init__.py", line 12, in <module>

    import setuptools.version

  File "/usr/local/lib/python2.7/dist-packages/setuptools/version.py", line 1, in <module>

    import pkg_resources

  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 70, in <module>

    import packaging.version

ImportError: No module named packaging.version

之后，当我运行pip时，我会得到这样的结果：

pi@raspberrypi:~ $ pip --version
Traceback (most recent call last):
  File "/usr/bin/pip", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 70, in <module>
    import packaging.version
ImportError: No module named packaging.version

我不知道该怎么解决这个问题。

Answer 1

在Raspberry Pi上安装云客户端库有一个诀窍:首先安装virtualenv和sphinx。以下步骤将帮助您开始：

sudo apt-get install python-pip virtualenv python-dev
virtualenv env
source env/bin/activate
pip install sphinx
pip install --upgrade google-cloud-vision
python