在安装Python包时出现错误：HTTPError: 404客户端错误：找不到URL。

Question

我正在安装Flask到我的Ubuntu系统，但无法安装，出现以下错误:

Exception:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 353, in run
    wb.build(autobuilding=True)
  File "/usr/lib/python2.7/dist-packages/pip/wheel.py", line 749, in build
    self.requirement_set.prepare_files(self.finder)
  File "/usr/lib/python2.7/dist-packages/pip/req/req_set.py", line 380, in prepare_files
    ignore_dependencies=self.ignore_dependencies))
  File "/usr/lib/python2.7/dist-packages/pip/req/req_set.py", line 554, in _prepare_file
    require_hashes
  File "/usr/lib/python2.7/dist-packages/pip/req/req_install.py", line 278, in populate_link
    self.link = finder.find_requirement(self, upgrade)
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 465, in find_requirement
    all_candidates = self.find_all_candidates(req.name)
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 423, in find_all_candidates
    for page in self._get_pages(url_locations, project_name):
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 568, in _get_pages
    page = self._get_page(location)
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 683, in _get_page
    return HTMLPage.get_page(link, session=self.session)
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 795, in get_page
    resp.raise_for_status()
  File "/usr/share/python-wheels/requests-2.18.4-py2.py3-none-any.whl/requests/models.py", line 935, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
HTTPError: 404 客户端错误：未找到URL：https://pypi.org/simple/flask/

我尝试了一些来自Stackoverflow的解决方案，但都不适用于我

无法通过pip安装任何包

我正在使用Ubuntu 18.04，Python 2.7，pip 9.0.1

- Ankur Tiwari

---

你的意思是Python和pip版本在这里出了问题吗？ - Ankur Tiwari

'pip install Flask' 应该可以完成任务。我希望你正在尝试同样的命令。 - Kris

@Kris 是的，我正在尝试同样的事情。 - Ankur Tiwari

你是在虚拟环境（virtualenv）上安装还是系统（system）上安装？ - Kris

我正在自己的系统上安装它。 - Ankur Tiwari

Answer 1

$ pip install --upgrade pip
Cache entry deserialization failed, entry ignored
Collecting pip
  Using cached https://files.pythonhosted.org/packages/54/eb/4a3642e971f404d69d4f6fa3885559d67562801b99d7592487f1ecc4e017/pip-20.3.3-py2.py3-none-any.whl
Installing collected packages: pip
  Found existing installation: pip 9.0.1
    Uninstalling pip-9.0.1:
      Successfully uninstalled pip-9.0.1
Successfully installed pip-20.3.3

对我来说解决了这个问题。

- Mona Jalal