Python pip 无法安装任何东西，错误：无效命令“egg_info”

pip fails to install anything, error: invalid command 'egg_info'

提问by thetao

I recently downloaded python from their website in addition to the Python version that already comes with Mac OSX. This is when I began to have problems installing packages with pip.

除了 Mac OSX 附带的 Python 版本之外，我最近从他们的网站下载了 python。这是我开始在使用 pip 安装软件包时遇到问题的时候。

sudo pip install -vvv pygoogle

Will output the following:

将输出以下内容：

The directory '/Users/robot/Library/Caches/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/Users/robot/Library/Caches/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting pygoogle
  Getting page https://pypi.python.org/simple/pygoogle/
  Starting new HTTPS connection (1): pypi.python.org
  "GET /simple/pygoogle/ HTTP/1.1" 200 233
  1 location(s) to search for versions of pygoogle:
  * https://pypi.python.org/simple/pygoogle/
  Getting page https://pypi.python.org/simple/pygoogle/
  "GET /simple/pygoogle/ HTTP/1.1" 200 233
  Analyzing links from page https://pypi.python.org/simple/pygoogle/
    Found link https://pypi.python.org/packages/source/p/pygoogle/pygoogle-0.6.tar.gz#md5=f9053f1b7350b899811a7c9226c8a2cb (from https://pypi.python.org/simple/pygoogle/), version: 0.6
    Skipping link http://www.google.com/apis/ (from https://pypi.python.org/simple/pygoogle/); not a file
  "GET /packages/source/p/pygoogle/pygoogle-0.6.tar.gz HTTP/1.1" 200 33672
  Downloading pygoogle-0.6.tar.gz
  Downloading from URL https://pypi.python.org/packages/source/p/pygoogle/pygoogle-0.6.tar.gz#md5=f9053f1b7350b899811a7c9226c8a2cb (from https://pypi.python.org/simple/pygoogle/)
  Running setup.py (path:/private/tmp/pip-build-1jAoXq/pygoogle/setup.py) egg_info for package pygoogle
    Running command python setup.py egg_info
    usage: -c [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
       or: -c --help [cmd1 cmd2 ...]
       or: -c --help-commands
       or: -c cmd --help

    error: invalid command 'egg_info'
    Complete output from command python setup.py egg_info:
    usage: -c [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
       or: -c --help [cmd1 cmd2 ...]
       or: -c --help-commands
       or: -c cmd --help

    error: invalid command 'egg_info'

    ----------------------------------------
Cleaning up...
Command "python setup.py egg_info" failed with error code 1 in /private/tmp/pip-build-1jAoXq/pygoogle
Exception information:
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip-7.1.0-py2.7.egg/pip/basecommand.py", line 223, in main
    status = self.run(options, args)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip-7.1.0-py2.7.egg/pip/commands/install.py", line 282, in run
    requirement_set.prepare_files(finder)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip-7.1.0-py2.7.egg/pip/req/req_set.py", line 334, in prepare_files
    functools.partial(self._prepare_file, finder))
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip-7.1.0-py2.7.egg/pip/req/req_set.py", line 321, in _walk_req_to_install
    more_reqs = handler(req_to_install)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip-7.1.0-py2.7.egg/pip/req/req_set.py", line 505, in _prepare_file
    abstract_dist.prep_for_dist()
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip-7.1.0-py2.7.egg/pip/req/req_set.py", line 123, in prep_for_dist
    self.req_to_install.run_egg_info()
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip-7.1.0-py2.7.egg/pip/req/req_install.py", line 407, in run_egg_info
    command_desc='python setup.py egg_info')
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip-7.1.0-py2.7.egg/pip/utils/__init__.py", line 732, in call_subprocess
    % (command_desc, proc.returncode, cwd))
InstallationError: Command "python setup.py egg_info" failed with error code 1 in /private/tmp/pip-build-1jAoXq/pygoogle

I have already tried all of the following, they just tell me the package setuptools is already installed.

我已经尝试了以下所有方法，他们只是告诉我已经安装了包 setuptools。

sudo pip install setuptools
sudo pip install [--upgrade] setuptools
easy_install [-U] setuptools

Please note the following commands output:

请注意以下命令输出：

where python
/Library/Frameworks/Python.framework/Versions/2.7/bin/python
/usr/local/bin/python

which python
/Library/Frameworks/Python.framework/Versions/2.7/bin/python

where pip
/Library/Frameworks/Python.framework/Versions/2.7/bin/pip
/usr/local/bin/pip

which pip
/Library/Frameworks/Python.framework/Versions/2.7/bin/pip

echo $SHELL
/bin/zsh

And my .zprofile:

还有我的 .zprofile：

# Setting PATH for Python 2.7
# The orginal version is saved in .zprofile.pysave
PATH="/Library/Frameworks/Python.framework/Versions/2.7/bin:${PATH}"
export PATH

采纳答案by Jameel Grand

Try pip install --upgrade setuptoolsor easy_install -U setuptools

尝试pip install --upgrade setuptools或easy_install -U setuptools

or

或者

Download thisfile and execute python ez_setup.py

下载这个文件并执行python ez_setup.py

回答by Tomasz Dobrzycki

I had the same error in Centos7 with postgresql 9.6 during psycopg2 pip install

在 psycopg2 pip 安装期间，我在 Centos7 和 postgresql 9.6 中遇到了同样的错误

I've extended PATH variable and it works:

我已经扩展了 PATH 变量并且它有效：

PATH=$PATH:/usr/pgsql-9.1/bin/