本文目录一览:
- 1、【Python入门】37.常用第三方模块之 创建虚拟环境virtualenv
- 2、关于python第三方模块 求指教
- 3、怎么安装python 第三方模块
- 4、python 第三方库怎么安装
- 5、如何安装python的第三方模块
【Python入门】37.常用第三方模块之 创建虚拟环境virtualenv
摘要:virtualenv可创建独立的虚拟运行环境,解决了不同应用项目间多版本的不兼容问题。
常用第三方模块
virtualenv
安装virtualenv
创建虚拟环境
使用virtualenv
小结
virtualenv 用于创建Python的虚拟环境。当一个项目需要运行的版本与系统所带的版本不一致,就需要创建一个该项目的独立运行环境,确保项目正常运行。
比如现在要做一个Django项目,用到的Django是1.8版本,但系统的Django版本已经更新到1.11了,如果用系统的环境来运行项目就会有不兼容的情况出现,那么就需要创建虚拟环境来解决。
Linux系统和Windows系统使用virtualenv略有不同。
下面介绍的是在 Windows系统 下如何使用virtualenv。
在命令行模式下输入:
等待安装成功即可。
首先通过cd命令进入需要创建虚拟环境的文件目录,如在D盘的envs文件夹里面
然后通过 virtualenv 创建一个虚拟环境,我们将它命名为 new_env
然后会看到下面结果:
说明成功使用当前系统的Python版本创建了一个虚拟环境。
通过cd命令进入虚拟环境目录下的Scripts目录
然后输入 activate
会出现下面的结果:
地址前面的括号表示,当前环境是Python创建的虚拟环境 new_env 。
输入 python ,可查看当前环境的Python版本
输入 pip list ,可查看当前环境下包含的库的版本
在虚拟环境下,用pip安装的所有包都会装在 new_env 环境下,系统Python环境不受影响。这样,我们就可以安装运行项目所需要的工具版本了,
最后,使用 deactivate 命令退出虚拟环境
virtualenv可创建独立的虚拟运行环境,解决了不同应用项目间多版本的不兼容问题。
以上就是本节的全部内容,感谢你的阅读。
下一节内容:图形界面
有任何问题与想法,欢迎评论与吐槽。
和博主一起学习Python吧( ̄▽ ̄)~*
关于python第三方模块 求指教
你先从python的安装开始检查,或者重装python;
安装的时候在第一个页面把 □add path勾上,默认添加环境变量,可能是你没有添加。
安装的时候尽量用国内的镜像源,可以先升级pip指令,然后要切换到安装python的目录下,我这边是安装在C盘的根目录所以写 cd c:\ 回车后加上指令。
1、python -m pip install --upgrade pip -i --trusted-host pypi.douban.com
2、切换为C盘根目录:pip install -i pillow
cd c:\ pip install -i pillow
看看你编写代码的工具里面有没有导入库,如果还不行就是你工具的原因。
工具你可以使用wing pro ,vscode ,aptana 三选一,体量小,方便使用。
还有不懂你再追问。
怎么安装python 第三方模块
方法1:下载源码,手动运行setuppy install去安装 下载对应的源码,往往都是targz,zip的压缩包,解压后,打开windows的cmd,切换到对应目录,运行: setuppy install 即可去安装。 方法2:利用第三方安装工具(如pip,easy_install,distr怎么安装python 第三方模块
python 第三方库怎么安装
【方法一】: 通过setuptools来安装python模块
首先下载
NOTE: 最好下载个setuptools,本人是15.2版本,里面包含了ez_setup
运行 python ez_setup.py
D:\work\installation\setuptools-15.2\setuptools-15.2python ez_setup.py 1.txt
Extracting in c:\users\admini~1\appdata\local\temp\tmpbxikxf
Now working in c:\users\admini~1\appdata\local\temp\tmpbxikxf\setuptools-15.2
Installing Setuptools
......
Copying setuptools-15.2-py2.7.egg to c:\python27\lib\site-packages
setuptools 15.2 is already the active version in easy-install.pth
Installing easy_install-script.py script to C:\Python27\Scripts
Installing easy_install.exe script to C:\Python27\Scripts
Installing easy_install-2.7-script.py script to C:\Python27\Scripts
Installing easy_install-2.7.exe script to C:\Python27\Scripts
Installed c:\python27\lib\site-packages\setuptools-15.2-py2.7.egg
Processing dependencies for setuptools==15.2
Finished processing dependencies for setuptools==15.2
运行 easy_install py
D:\workeasy_install py #py 为第三方库文件
Searching for py
Best match: py 1.4.26
Adding py 1.4.26 to easy-install.pth file
Using c:\python27\lib\site-packages
Processing dependencies for py
Finished processing dependencies for py
【方法二】: 通过pip来安装python模块
安装 easy_install pip
D:\workeasy_install pip
Searching for pip
Best match: pip 6.1.1
Processing pip-6.1.1-py2.7.egg
pip 6.1.1 is already the active version in easy-install.pth
Installing pip-script.py script to C:\Python27\Scripts
Installing pip.exe script to C:\Python27\Scripts
Installing pip2.7-script.py script to C:\Python27\Scripts
Installing pip2.7.exe script to C:\Python27\Scripts
Installing pip2-script.py script to C:\Python27\Scripts
Installing pip2.exe script to C:\Python27\Scripts
Using c:\python27\lib\site-packages\pip-6.1.1-py2.7.egg
Processing dependencies for pip
Finished processing dependencies for pip
运行 pip install xlrd
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.
zip DEPRECATED. Zip individual packages.
unzip DEPRECATED. Unzip individual packages.
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.
【方法三】:直接从网上下载下可执行文件来安装.
比如说,去 pythonlibs 网站,提供了很多Python非官方包下载,二进制文件,下载安装方便.
如何安装python的第三方模块
通过pip来安装python模块
安装 easy_install pip
D:\workeasy_install pip
Searching for pip
Best match: pip 6.1.1
Processing pip-6.1.1-py2.7.egg
pip 6.1.1 is already the active version in easy-install.pth
Installing pip-script.py script to C:\Python27\Scripts
Installing pip.exe script to C:\Python27\Scripts
Installing pip2.7-script.py script to C:\Python27\Scripts
Installing pip2.7.exe script to C:\Python27\Scripts
Installing pip2-script.py script to C:\Python27\Scripts
Installing pip2.exe script to C:\Python27\Scripts
Using c:\python27\lib\site-packages\pip-6.1.1-py2.7.egg
Processing dependencies for pip
Finished processing dependencies for pip
运行 pip install xlrd
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.
zip DEPRECATED. Zip individual packages.
unzip DEPRECATED. Unzip individual packages.
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.