python - 在 python 3.4.3 上安装软件包时出现奇怪的错误

Question

当我尝试安装软件包时，发生了一个非常奇怪的异常。我使用命令提示符找到 Python 目录 (python34)，然后在将其定位到保存包的所需目录后运行 pip 命令。任何人都有一个想法。也许这很愚蠢，但它在这里煎炸了我的大脑。

C:\kushal\DataMining\Python Packages> C:\Python34\Scripts>pip install C:\kushal\DataMining\Python Packages\setuptools-18.3-py2.py3-none-any.whl

You are using pip version 6.0.8, however version 7.1.2 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Exception:
Traceback (most recent call last):
  File "C:\Python34\lib\site-packages\pip\basecommand.py", line 232, in main
    status = self.run(options, args)
  File "C:\Python34\lib\site-packages\pip\commands\install.py", line 305, in run
    name, None, isolated=options.isolated_mode,
  File "C:\Python34\lib\site-packages\pip\req\req_install.py", line 181, in from_line
    isolated=isolated)
  File "C:\Python34\lib\site-packages\pip\req\req_install.py", line 54, in __init__
    req = pkg_resources.Requirement.parse(req)
  File "C:\Python34\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2873, in parse
    reqs = list(parse_requirements(s))
  File "C:\Python34\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2820, in parse_requirements
    "version spec")
  File "C:\Python34\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2785, in scan_list
    raise ValueError(msg, line, "at", line[p:])
ValueError: ('Expected version spec in', 'C:\\kushal\\DataMining\\Python', 'at',
 ':\\kushal\\DataMining\\Python')

Answer 1

您收到错误的原因是您没有使用引号将命令中的路径括起来。本来应该是:

C:\Python34\Scripts>pip install "C:\kushal\DataMining\Python Packages\setuptools-18.3-py2.py3-none-any.whl"

或者，你可以直接运行

C:\Python34\Scripts>pip install setuptools-18.3-py2.py3-none-any.whl

由于您已经位于C:\kushal\DataMining\Python Packages目录中，因此无需再次将其全部拼写出来。

最后，为了节省一些时间，请将 C:\Python34 和 C:\Python34\Scripts 添加到路径的开头。现在，您可以直接运行 python program.py 或 pip install packagename.whl ，而无需每次都添加完整路径。