打开windows命令行,不需要输入“python”或输入”python3”,而是直接输入以下指令。我们默认系统环境变量已经按照安装位置设置好。
一般安装之后默认是已经安装好了pip,我们可以直接使用:
对于python2:
pip install xxx
对于python3:
pip3 install xxx
要删除安装好的包,直接:
pip uninstall xxx #python2
pip3 install xxx #python3
如果发现在cmd中输入pip不能识别,并且系统环境变量设置没有问题,我们应该视为python没有安装pip工具,我们需要自行安装。
这里我们选择压缩包,解压之后里面会有一个setup.py,执行:
python setup.py install
2、添加环境变量
我的电脑是:
C:\Python27\Scripts
可以根据上一步骤安装成功的提示可以看到pip.exe安装到哪里了。
这样我们在cmd中输入pip出现以下:
>pip
Usage:
pip [options]
Commands:
install Install packages.
download Download packages.
uninstall Uninstall packages.
freeze Output installed packages in requirements format.
list List installed packages.
show Show information about installed packages.
check Verify installed packages have compatible dependencies.
search Search PyPI for packages.
wheel Build wheels from your requirements.
hash Compute hashes of package archives.
completion A helper command used for command completion.
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. Option is additive, and can be
used up to 3 times (corresponding to WARNING,
ERROR, and CRITICAL logging levels).
--log Path to a verbose appending log.
--proxy Specify a proxy in the form
[user:passwd@]proxy.server:port.
--retries Maximum number of retries each connection should
attempt (default 5 times).
--timeout Set the socket timeout (default 15 seconds).
--exists-action Default action when a path already exists:
(s)witch, (i)gnore, (w)ipe, (b)ackup, (a)bort.
--trusted-host Mark this host as trusted, even though it does
not have valid or any HTTPS.
--cert Path to alternate CA bundle.
--client-cert Path to SSL client certificate, a single file
containing the private key and the certificate
in PEM format.
--cache-dir Store the cache data in .
--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.
证明安装成功。
在命令行窗口中输入:
>easy_install
error:No urls,filenames,or requirements specified(see --help)
这证明已经安装好了easy_install工具。
其实上面的pip安装我们可以直接使用:
easy_install pip
从上面我们可以发现只要: easy_install +包名 即可。
有时可能会找不到匹配导致安装失败,需要尝试其他办法。
首先我们需要安装wheel包:
pip install wheel
之后从网上下载要安装的包的wheel文件,例如我们要安装numpy包,我们从官网上下载.whl文件,要根据自己电脑的位数和安装的python版本来合理选择whl文件。
然后在命令行中切换到你下载保存的目录(使用cd指令),执行:
>pip install numpy-1.13.0-cp27-none-win_amd64.whl
等待安装成功即可。
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