在 Mac OS X 上安装 pip 时出错

Question

I'm trying to install pip on a Mac OS X system using python version 2.6 and got the following errors.

$ python /tmp/get-pip.py 
/tmp/tmpzyN3Si/pip.zip/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
Collecting pip
/tmp/tmpzyN3Si/pip.zip/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
Exception:
Traceback (most recent call last):
  File "/tmp/tmpLZAZtY/pip.zip/pip/basecommand.py", line 223, in main
    status = self.run(options, args)
  File "/tmp/tmpLZAZtY/pip.zip/pip/commands/install.py", line 280, in run
    requirement_set.prepare_files(finder)
  File "/tmp/tmpLZAZtY/pip.zip/pip/req/req_set.py", line 317, in prepare_files
    functools.partial(self._prepare_file, finder))
  File "/tmp/tmpLZAZtY/pip.zip/pip/req/req_set.py", line 304, in _walk_req_to_install
    more_reqs = handler(req_to_install)
  File "/tmp/tmpLZAZtY/pip.zip/pip/req/req_set.py", line 439, in _prepare_file
    req_to_install.populate_link(finder, self.upgrade)
  File "/tmp/tmpLZAZtY/pip.zip/pip/req/req_install.py", line 244, in populate_link
    self.link = finder.find_requirement(self, upgrade)
  File "/tmp/tmpLZAZtY/pip.zip/pip/index.py", line 486, in find_requirement
    all_versions = self._find_all_versions(req.name)
  File "/tmp/tmpLZAZtY/pip.zip/pip/index.py", line 404, in _find_all_versions
    index_locations = self._get_index_urls_locations(project_name)
  File "/tmp/tmpLZAZtY/pip.zip/pip/index.py", line 378, in _get_index_urls_locations
    page = self._get_page(main_index_url)
  File "/tmp/tmpLZAZtY/pip.zip/pip/index.py", line 810, in _get_page
    return HTMLPage.get_page(link, session=self.session)
  File "/tmp/tmpLZAZtY/pip.zip/pip/index.py", line 920, in get_page
    "Cache-Control": "max-age=600",
  File "/tmp/tmpLZAZtY/pip.zip/pip/_vendor/requests/sessions.py", line 477, in get
    return self.request('GET', url, **kwargs)
  File "/tmp/tmpLZAZtY/pip.zip/pip/download.py", line 373, in request
    return super(PipSession, self).request(method, url, *args, **kwargs)
  File "/tmp/tmpLZAZtY/pip.zip/pip/_vendor/requests/sessions.py", line 465, in request
    resp = self.send(prep, **send_kwargs)
  File "/tmp/tmpLZAZtY/pip.zip/pip/_vendor/requests/sessions.py", line 573, in send
    r = adapter.send(request, **kwargs)
  File "/tmp/tmpLZAZtY/pip.zip/pip/_vendor/cachecontrol/adapter.py", line 36, in send
    cached_response = self.controller.cached_request(request)
  File "/tmp/tmpLZAZtY/pip.zip/pip/_vendor/cachecontrol/controller.py", line 102, in cached_request
    resp = self.serializer.loads(request, self.cache.get(cache_url))
  File "/tmp/tmpLZAZtY/pip.zip/pip/_vendor/cachecontrol/serialize.py", line 108, in loads
    return getattr(self, "_loads_v{0}".format(ver))(request, data)
  File "/tmp/tmpLZAZtY/pip.zip/pip/_vendor/cachecontrol/serialize.py", line 184, in _loads_v2
    return self.prepare_response(request, cached)
  File "/tmp/tmpLZAZtY/pip.zip/pip/_vendor/cachecontrol/serialize.py", line 145, in prepare_response
    **cached["response"]
TypeError: __init__() keywords must be strings

Then I tried it with python2.6:

python2.6 /tmp/get-pip.py
/tmp/tmpI57ALq/pip.zip/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
You are using pip version 7.0.3, however version 7.1.2 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Collecting pip
/tmp/tmpI57ALq/pip.zip/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
  Downloading pip-7.1.2-py2.py3-none-any.whl (1.1MB)
    100% |################################| 1.1MB 303kB/s 
Collecting setuptools
  Downloading setuptools-18.3.1-py2.py3-none-any.whl (462kB)
    100% |################################| 462kB 723kB/s 
Collecting wheel
  Downloading wheel-0.24.0-py2.py3-none-any.whl (63kB)
    100% |################################| 65kB 3.6MB/s 
Collecting argparse (from wheel)
  Downloading argparse-1.3.0-py2.py3-none-any.whl
Installing collected packages: pip, setuptools, argparse, wheel
Successfully installed argparse-1.3.0 pip-7.1.2 setuptools-18.3.1 wheel-0.24.0

But pip command can't be found when I try to use it.

$  which pip
pip not found

When I run python2.6 again, I get the following:

python2.6 /tmp/get-pip.py
You are using pip version 7.0.3, however version 7.1.2 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
/tmp/tmpCu8MaZ/pip.zip/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
Requirement already up-to-date: pip in /opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages

I've read that pip install requests[security] would solve the problem but first I need to install pip in order to install those packages.

EDIT : It seems like this is a bug related to the Python 2.6.1. I have installed a newer version of Python (2.7.10) with Homebrew and installed pip using easy_install. Then I added path /usr/local/bin to have a priority and pip installs packages now. I'm not sure if it's ok to use non-native python for pip though.

Answer 1

Did you try easy_install ?

Here's an EASY solution.

First of all, make sure you have Python installed. How? Open terminal and run the following command.

python --version

If this command returns a version number that means python is already installed. That also means you already have access to easy_install considering you are using OS X .

Now, all you have to do is run the following command.

sudo easy_install pip

After that, pip will be installed and you'll be able to use it for installing other packages.

Cheers! Let me know if this way of installing pip worked for you. 💯

Answer 2

Re Install Python And then it will work . Pip comes pre-installed when you install Python on your system .