python用pip安装whl文件
大家好，又见面了，我是你们的朋友全栈君。
1.安装python第三方包：
注：安装whl文件，前提执行 ,才能成功。
pip install wheel
<1.进入c:\python\scripts的目录<2. 在D:\Python27\Scripts目录下用管理员打开cmd，运行pip命令pip install 包的名字.whl
当然也可以使用：
pip install C:\Users\xxx\Downloads\python_dateutil-2.5.3-py2.py3-none-any.whl<3.安装成功后，出现Successfully .....2.安装失败：
<1.查看自已配置的环境，可以看看另一篇：环境变量
<2.环境变量没问题，就使用在线安装。例如：安装numpy ,命令：pip install numpy ,就成功啦。
3.卸载已安装的库：
<1.使用 pip list 查看已安装的库，看好库的名称。
<2. 使用 pip uninstall tensorflow-gpu ，就会把它卸载下来啦。（我是要安装cpu版本的，安装错啦卸载很简单）。
<3 当然还有其他卸载方法 ：安装TensorFlow转载：点击打开链接
方法二：手工删除 去Python的第三方模块或包的存放位置进行手工删除文件和文件夹，然后删除easy-install.pth文件中的相应的行。
pip是一个很方便的工具, 可以方便安装, 列出, 卸载python的模块/库/包等
常见使用, 例如: cmd下: 安装pycurl包 pip install pycurl
列出已经安装的python包 pip list
输出pycurl包的信息 pip show pycurl 卸载pycurl包 pip uninstall pycurl
以下是pip全部命令参数 : Usage: pip <command> [options] Commands: install Install packages. uninstall Uninstall packages. freeze Output installed packages in requirements format. list List installed packages. show Show information about installed packages. search Search PyPI for packages. wheel Build wheels from your requirements. help Show help for commands. General Options: -h, –help Show help. –isolated Run pip in an isolated mode, ignoring environment variables and user configuration. -v, –verbose Give more output. Option is additive, and can be used up to 3 times. -V, –version Show version and exit. -q, –quiet Give less output. –log <path> Path to a verbose appending log. –proxy <proxy> Specify a proxy in the form [user:passwd@]proxy.server:port. –retries <retries> Maximum number of retries each connection should attempt (default 5 times). –timeout <sec> Set the socket timeout (default 15 seconds). –exists-action <action> Default action when a path already exists: (s)witch, (i)gnore, (w)ipe, (b)ackup. –trusted-host <hostname> Mark this host as trusted, even though it does not have valid or any HTTPS. –cert <path> Path to alternate CA bundle. –client-cert <path> Path to SSL client certificate, a single file containing the private key and the certificate in PEM format. –cache-dir <dir> Store the cache data in <dir>. –no-cache-dir Disable the cache. –disable-pip-version-check Don’t periodically check PyPI to determine whether a new version of pip is available for download. Implied with –no-index.
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