Question

我厌倦了用pip安装venv，它给了我以下错误消息：

我尝试了很多次，几天前效果很好...

这是命令：

$ pip install venv

和错误：

Collecting venv
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 Client Error: Not Found for url: https://pypi.org/simple/venv/

操作系统：linux ubuntu 18.04 python 3.7

谢谢！

Answer 1

在ubuntu 18.04上，python可执行文件默认情况下绑定到python2.7，请参见this；因此，当您这样做时：

pip install venv

您正尝试在仅与python3.3 +兼容的python2.7上安装venv（请参见下文），这就是为什么会出现这些错误的原因。

请注意，您无需在venv +上安装python3.3，因为它是默认包含的，请参见venv documentation。

通过执行以下命令来创建虚拟环境：

python3 -m venv /path/to/new/virtual/environment

对于python的早期版本（在您的情况下为2.7），可以使用virtualenv

pip install virtualenv

创建：

virtualenv -p /usr/bin/python2.7 <path/to/new/virtualenv/>

请注意，-p标志不是强制性的，只是为了确保在使用python 2和python 3都安装virtualenv的情况下调用正确的python版本。

如何使用pip安装venv

1 个答案: