Question

pip让我升级了一条消息：

You are using pip version 7.0.1, however version 7.0.3 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

所以我运行了该命令，我得到一个例外，pip无法卸载旧版本，因为访问我的用户目录被拒绝：

    Collecting pip
    Downloading pip-7.0.3-py2.py3-none-any.whl (1.1MB)
      100% |################################| 1.1MB 292kB/s
    Installing collected packages: pip
    Found existing installation: pip 7.0.1
    Uninstalling pip-7.0.1:
      Successfully uninstalled pip-7.0.1
    Exception:
    Traceback (most recent call last):
    File "C:\Python27\lib\site-packages\pip\basecommand.py", line 223, in main
    status = self.run(options, args)
    File "C:\Python27\lib\site-packages\pip\commands\install.py", line 297, in run

    root=options.root_path,
    File "C:\Python27\lib\site-packages\pip\req\req_set.py", line 633, in install
    requirement.commit_uninstall()
    File "C:\Python27\lib\site-packages\pip\req\req_install.py", line 734, in commit_uninstall
    self.uninstalled.commit()
    File "C:\Python27\lib\site-packages\pip\req\req_uninstall.py", line 153, in commit
    rmtree(self.save_dir)
    File "C:\Python27\lib\site-packages\pip\_vendor\retrying.py", line 49, in wrapped_f
    return Retrying(*dargs, **dkw).call(f, *args, **kw)
    File "C:\Python27\lib\site-packages\pip\_vendor\retrying.py", line 212, in call
    raise attempt.get()
    File "C:\Python27\lib\site-packages\pip\_vendor\retrying.py", line 247, in get

    six.reraise(self.value[0], self.value[1], self.value[2])
    File "C:\Python27\lib\site-packages\pip\_vendor\retrying.py", line 200, in call
    attempt = Attempt(fn(*args, **kwargs), attempt_number, False)
    File "C:\Python27\lib\site-packages\pip\utils\__init__.py", line 89, in rmtree
    onerror=rmtree_errorhandler)
    File "C:\Python27\lib\shutil.py", line 247, in rmtree
    rmtree(fullname, ignore_errors, onerror)
    File "C:\Python27\lib\shutil.py", line 247, in rmtree
    rmtree(fullname, ignore_errors, onerror)
    File "C:\Python27\lib\shutil.py", line 252, in rmtree
    onerror(os.remove, fullname, sys.exc_info())
    File "C:\Python27\lib\site-packages\pip\utils\__init__.py", line 101, in rmtree_errorhandler
    func(path)
    WindowsError: [Error 5] Access is denied: 'c:\\users\\chris\\appdata\\local\\temp\\pip-ossyhh-uninstall\\python27\\scripts\\pip.exe'

我正在运行Windows 8.1，但我在另一台运行Windows 7的计算机上遇到了同样的错误。它似乎没有停止安装新版本，但我最终确实pip文件夹留在我的临时目录中。有谁知道为什么会发生这种情况或我如何纠正它？

EDIT1： 奇怪的是，使用admin privlidges运行升级会引发 new 异常：

File "C:\Python27\lib\site-packages\pip-7.0.1-py2.7.egg\pip\_vendor\distlib\scripts.py", line 302, in _get_launcher
result = finder(distlib_package).find(name).bytes
AttributeError: 'NoneType' object has no attribute 'bytes'`

完全没有完成升级。

EDIT2： 解决这个问题的唯一方法似乎是使用easy_install来升级pip（-U或-m选项），但是如果pip不能自我升级，那么对我来说似乎是一个问题（并声明）功能是这样做的。

Answer 1

这里的问题显然是因为您正在运行pip.exe来升级自己。因此，要删除的pip.exe实际上正在运行。修复方法是使用稍微不同的命令行：

python -m pip install --upgrade pip

这是来自bug report（虽然还有其他人）：

•访问被拒绝：'... pip.exe'是因为你正在升级pip 使用pip.exe包装器在升级中被替换。上 Windows无法替换使用中的可执行文件/ DLL。你应该用 python -m pip install --upgrade pip。 IIRC注意到这一点文档。

Answer 2

我最近在Windows 7机器上遇到了同样的问题。我以管理员身份运行命令提示符（来自您的评论），然后输入pip install --upgrade pip。

它从wazoo返回错误消息，但是当我再次尝试（pip install --upgrade pip）时，它告诉我pip已经是最新的。然后pip -V告诉我，我有点7.0.3。

不知道发生了什么。试图在Windows上获取python包似乎非常困难。希望这很有帮助。

另外，我使用的是python 3.5，可能会有所不同。

Answer 3

我在使用pip-7.1.2版本安装matplotlib时遇到了问题，因此我将其升级到pip 9.0.1。

然而，更新它时给了我一个拒绝访问pip.exe的错误，但当我使用pip -v检查版本时它已更新。我只是运行pip install matplotlib。它对我有用。

D:\Users\703186511>pip install --upgrade pip

或尝试

D:\Users\703186511>python -m pip install --upgrade pip
D:\Users\703186511>pip -V
D:\Users\703186511>pip install matplotlib

Answer 4

我遇到了同样的问题。我只是在我的mac终端上使用了SUDO命令并且它工作正常。下面是终端输出。

sudo pip install -U pip

Anuvrats-MacBook-Air:~ anuvrattiku$ pip -V
pip 7.1.2 from /Library/Python/2.7/site-packages/pip-7.1.2-py2.7.egg (python 2.7)
Anuvrats-MacBook-Air:~ anuvrattiku$ **sudo pip install -U pip**
Password:
The directory '/Users/anuvrattiku/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/anuvrattiku/Library/Caches/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting pip
Downloading pip-8.0.2-py2.py3-none-any.whl (1.2MB)
100% |████████████████████████████████| 1.2MB 272kB/s 
Installing collected packages: pip
Found existing installation: pip 7.1.2
Uninstalling pip-7.1.2:
Successfully uninstalled pip-7.1.2
Successfully installed pip-8.0.2
Anuvrats-MacBook-Air:~ anuvrattiku$

＆＃34;访问被拒绝＆＃34;在Windows上升级pip.exe时

4 个答案: