pip让我升级,并显示一条消息:
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.
因此,我运行了该命令,得到一个异常,即pip无法卸载旧版本,因为对用户目录的访问被拒绝:
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'
我运行的是Windows 8.1,但在运行Windows 7的另一台计算机上也出现了同样的错误。它似乎并没有停止新版本的安装,但我最终在temp目录中留下了pip文件夹。有人知道为什么会发生这种事吗?我怎么能纠正?
编辑1: 奇怪的是,使用admin privildges运行升级会引发一个新的异常:
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'`
升级完全失败。
编辑2: 解决这个问题的唯一方法似乎是使用easy_install来升级pip(可以是-U或-m选项),但是如果pip不能升级自己,而它的预期(和声明的)功能是这样做,对我来说似乎是个问题。
我最近在Windows7上也遇到了同样的问题。我以管理员身份运行命令提示符(从您的注释中),然后键入
pip install --upgrade pip
。它在wazoo中返回了错误消息,但是当我再次尝试这样做(
pip install --upgrade pip
)时,它告诉我pip已经是最新的。然后pip -V
告诉我我得了pip 7.0.3。不知道发生了什么。试图在windows上获得python包似乎非常困难。希望对你有帮助。
另外,我使用的是Python3.5,可能有所不同。
这里的问题显然是因为您运行
pip.exe
来升级自身。因此,要删除的pip.exe
实际上正在运行。修复方法是使用稍有不同的命令行:这是来自这个bug report(尽管还有其他的):
在使用pip-7.1.2版本安装matplotlib时,我也遇到了这个问题,所以我将其升级到pip 9.0.1。
不过,在更新时,它给了我一个错误,即访问pip.exe被拒绝,但当我使用pip-v检查版本时,它被更新了。我只需运行pip install matplotlib。这对我有效。
或者试试
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