blocks|key|5950960|text|我建议使用Python3.3中引入的实用程序。您可以直接从作者的website手动下载并安装它，以便在早期版本的Python2和3中使用。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|5950961|无论您如何获取它，在安装之后，它都将与所有标准Python文件扩展名(即.py,+.pyw、.pyc和.pyo文件)相关联。您不仅可以显式地控制在命令提示符处使用哪个版本，而且还可以通过在#!/usr/bin/env+pythonX脚本的开头添加Linux/Unix-y+shebang+Python注释来逐个脚本地控制使用哪个版本。|style|CODE|5950962|entityMap|0|LINK|mutability|MUTABLE|url|https://bitbucket.org/vinay.sajip/pylauncher^0|W|7|0|0|10|4|15|4|1A|4|1F|4|2M|M|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@$A|U|B|V|F|G]|$A|W|B|X|F|G]|$A|Y|B|Z|F|G]|$A|10|B|11|F|G]|$A|12|B|13|F|G]]|9|@]|C|$]]|$1|H|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

I would suggest using the <a href="http://docs.python.org/3/using/windows.html?highlight=shebang#python-launcher-for-windows" rel="noreferrer">Python Launcher for Windows</a> utility that was introduced into Python 3.3. You can manually download and install it directly from the author's <a href="https://bitbucket.org/vinay.sajip/pylauncher" rel="noreferrer">website</a> for use with earlier versions of Python 2 and 3. 

Regardless of how you obtain it, after installation it will have associated itself with all the standard Python file extensions (i.e. <code>.py,</code> <code>.pyw</code>, <code>.pyc</code>, and <code>.pyo</code> files). You'll not only be able to explicitly control which version is used at the command-prompt, but also on a script-by-script basis by adding Linux/Unix-y shebang <code>#!/usr/bin/env pythonX</code> comments at the beginning of your Python scripts.

blocks|key|4482641|text|Python3.3引入了适用于Windows的Python启动程序，安装程序将其作为py.exe和pyw.exe安装到c:\Windows\中。安装程序还会创建与.py和.pyw的关联。然后添加#!python3或#!python2作为第一行。不需要向PATH环境变量添加任何内容。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4482642|更新：只需从官方python.org/download安装Python3.3。它还将添加启动器。然后，将第一行添加到扩展名为.py的脚本中。然后，您可以通过在cmd行上键入scriptname.py来启动脚本，更明确地说是通过py+scriptname.py，也可以通过双击scipt图标来启动脚本。|BOLD|4482643|py.exe查找C:\PythonXX\python.exe，其中XX与计算机上安装的Python版本相关。比方说，在C:\Python27中安装了Python2.7.6，在C:\Python33中安装了Python3.3.3。Python启动器将使用脚本中的第一行来选择一个已安装的版本。默认情况下(即不明确说明版本)是使用计算机上可用的最高版本的Python+2。|4482644|entityMap|0|LINK|mutability|MUTABLE|url|http://www.python.org/download/^0|16|6|1D|7|1N|B|29|3|2D|4|2P|9|2Z|9|3I|4|0|0|3|1Q|3|2E|D|35|G|8|J|0|0|0|6|8|M|X|2|1N|B|2F|B|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]|$9|X|A|Y|B|C]|$9|Z|A|10|B|C]|$9|11|A|12|B|C]|$9|13|A|14|B|C]|$9|15|A|16|B|C]|$9|17|A|18|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|19|8|@$9|1A|A|1B|B|H]|$9|1C|A|1D|B|C]|$9|1E|A|1F|B|C]|$9|1G|A|1H|B|C]]|D|@$9|1I|A|1J|1|1K]]|E|$]]|$1|I|3|J|5|6|7|1L|8|@$9|1M|A|1N|B|C]|$9|1O|A|1P|B|C]|$9|1Q|A|1R|B|C]|$9|1S|A|1T|B|C]|$9|1U|A|1V|B|C]]|D|@]|E|$]]|$1|K|3|-4|5|6|7|1W|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

Python 3.3 introduces Python Launcher for Windows that is installed into <code>c:\Windows\</code> as <code>py.exe</code> and <code>pyw.exe</code> by the installer. The installer also creates associations with <code>.py</code> and <code>.pyw</code>. Then add <code>#!python3</code> or <code>#!python2</code> as the first lline. No need to add anything to the <code>PATH</code> environment variable.

Update: Just install Python 3.3 from the official <a href="http://www.python.org/download/" rel="noreferrer">python.org/download</a>. It will add also the launcher. Then add the first line to your script that has the <code>.py</code> extension. Then you can launch the script by simply typing the <code>scriptname.py</code> on the cmd line, od more explicitly by <code>py scriptname.py</code>, and also by double clicking on the scipt icon.

The <code>py.exe</code> looks for <code>C:\PythonXX\python.exe</code> where <code>XX</code> is related to the installed versions of Python at the computer. Say, you have Python 2.7.6 installed into <code>C:\Python27</code>, and Python 3.3.3 installed into <code>C:\Python33</code>. The first line in the script will be used by the Python launcher to choose one of the installed versions. The default (i.e. without telling the version explicitly) is to use the highest version of Python 2 that is available on the computer.

blocks|key|5950999|text|我还遇到了在我的Windows机上同时使用python2和python3的情况。下面是我解决这个问题的方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5951000|5951001|下载python2x和python3x，并安装了它们。将命令窗口添加到环境变量PATH.|ordered-list-item|offset|length|style|CODE|5951002|Go+to+C:\Python35;C:\Python35\Scripts;C:\Python27;C:\Python27\Scripts+to+C:\Python35要将python.exe重命名为python3.exe，也可以将其重命名为C:\Python27，将python.exe重命名为命令窗口。|5951003|在命令行中键入python2+scriptname.py或python3+scriptname.py以切换您喜欢的版本。|5951004|5951005|entityMap^0|0|0|13|4|0|6|1R|21|B|2E|A|2S|B|3D|B|3Q|A|0|7|L|T|L|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|R|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|S|8|@$F|T|G|U|H|I]]|9|@]|A|$]]|$1|J|3|K|5|E|7|V|8|@$F|W|G|X|H|I]|$F|Y|G|Z|H|I]|$F|10|G|11|H|I]|$F|12|G|13|H|I]|$F|14|G|15|H|I]|$F|16|G|17|H|I]]|9|@]|A|$]]|$1|L|3|M|5|E|7|18|8|@$F|19|G|1A|H|I]|$F|1B|G|1C|H|I]]|9|@]|A|$]]|$1|N|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]]|P|$]]

I also met the case to use both python2 and python3 on my Windows machine. Here's how i resolved it: 

<ol>
<li>download python2x and python3x, installed them. </li>
<li>add <code>C:\Python35;C:\Python35\Scripts;C:\Python27;C:\Python27\Scripts</code> to environment variable <code>PATH</code>.</li>
<li>Go to <code>C:\Python35</code> to rename <code>python.exe</code> to <code>python3.exe</code>, also to <code>C:\Python27</code>, rename <code>python.exe</code> to <code>python2.exe</code>.</li>
<li>restart your command window. </li>
<li>type <code>python2 scriptname.py</code>, or <code>python3 scriptname.py</code> in command line to switch the version you like.</li>
</ol>

How can I configure windows command dialog to run different python versions in it? For example when I type <code>python2</code> it runs python 2.7 and when I type <code>python3</code> it runs python 3.3? I know how to configure environment variables for one version but two? I mean something like Linux terminal.

How to run different python versions in cmd

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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如何配置windows命令对话框在其中运行不同的python版本？例如，当我输入python2时，它运行Python2.7，而当我输入python3时，它运行Python3.3？我知道如何为一个而不是两个版本配置环境变量？我的意思是像Linux终端这样的东西。

问如何在cmd中运行不同版本的python
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