如何在MacOS Sierra（10.x）上完全删除并重新安装PIP？

Question

让PIP正常工作直到几天前。不确定如何。

试着现在运行它，现在显示问题。添加错误的完整堆栈：

Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/usr/local/lib/python2.7/site-packages/pip/commands/install.py", line 335, in run
    wb.build(autobuilding=True)
  File "/usr/local/lib/python2.7/site-packages/pip/wheel.py", line 749, in build
    self.requirement_set.prepare_files(self.finder)
  File "/usr/local/lib/python2.7/site-packages/pip/req/req_set.py", line 380, in prepare_files
    ignore_dependencies=self.ignore_dependencies))
  File "/usr/local/lib/python2.7/site-packages/pip/req/req_set.py", line 487, in _prepare_file
    req_to_install, finder)
  File "/usr/local/lib/python2.7/site-packages/pip/req/req_set.py", line 428, in _check_skip_installed
    req_to_install, upgrade_allowed)
  File "/usr/local/lib/python2.7/site-packages/pip/index.py", line 465, in find_requirement
    all_candidates = self.find_all_candidates(req.name)
  File "/usr/local/lib/python2.7/site-packages/pip/index.py", line 423, in find_all_candidates
    for page in self._get_pages(url_locations, project_name):
  File "/usr/local/lib/python2.7/site-packages/pip/index.py", line 568, in _get_pages
    page = self._get_page(location)
  File "/usr/local/lib/python2.7/site-packages/pip/index.py", line 683, in _get_page
    return HTMLPage.get_page(link, session=self.session)
  File "/usr/local/lib/python2.7/site-packages/pip/index.py", line 792, in get_page
    "Cache-Control": "max-age=600",
  File "/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py", line 488, in get
    return self.request('GET', url, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pip/download.py", line 386, in request
    return super(PipSession, self).request(method, url, *args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py", line 475, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py", line 596, in send
    r = adapter.send(request, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pip/_vendor/cachecontrol/adapter.py", line 47, in send
    resp = super(CacheControlAdapter, self).send(request, **kw)
  File "/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/adapters.py", line 390, in send
    conn = self.get_connection(request.url, proxies)
  File "/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/adapters.py", line 290, in get_connection
    proxy_manager = self.proxy_manager_for(proxy)
  File "/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/adapters.py", line 194, in proxy_manager_for
    **proxy_kwargs)
  File "/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/poolmanager.py", line 367, in proxy_from_url
    return ProxyManager(proxy_url=url, **kw)
  File "/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/poolmanager.py", line 312, in __init__
    proxy = parse_url(proxy_url)
  File "/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/util/url.py", line 189, in parse_url
    raise LocationParseError(url)
LocationParseError: Failed to parse: user:pass

想要尝试完全重新安装pip。

建议的方法是什么？

Answer 1

下载Anaconda（或Miniconda），运行它，然后重新启动终端然后开始使用环境。创建环境类型

conda create -n my_project_name python=3.6
conda activate my_project_name

现在进行所需的所有pip安装和conda安装。你的路径是固定的。皮普是固定的。疯了。

编辑：现在您已经发布了完整的回溯，看起来您需要向代理提供用户名和密码。这是一种方法。

pip install --proxy=https://user@mydomain:port somepackage

Answer 2

你的pip和Python安装都很好。你的代理配置有什么问题。

在OS X上，环境变量和OS X网络配置都可以提供代理信息。首先找出你的配置：

python2.7 -c 'import urllib, pprint; pprint.pprint(urllib.getproxies())'

然后在网络设置中查找任何不正确的配置（在系统配置中，检查代理选项卡的活动网络），并在*_proxy条目的环境变量中查找（http_proxy，https_proxy等）。

您可以通过使用--proxy开关在命令行上设置代理来手动覆盖代理：

pip --proxy= install ...

注意空的--proxy=;或者您可以设置特定的代理。

如果你真的需要重新安装你的Python设置，你似乎已经安装了自己的Homebrew，所以你可以用brew install -f python@2重新安装它。