blocks|key|918371|text|您可以在一台计算机上安装多个版本的Python，并且在安装过程中，您可以选择让其中一个版本与Python文件扩展名关联。如果你安装模块，不同的版本会有不同的安装程序包，或者你可以选择你想要的目标版本。因为它们通常将自己安装到解释器版本的site-package目录中，所以应该不会有任何冲突(但我还没有测试过这一点)。要选择哪个版本的python，您必须手动指定解释器的路径(如果它不是默认路径)。据我所知，它们会共享相同的PATH和PYTHONPATH变量，这可能是一个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|918372|注:我运行的是Windows+XP。我不知道其他版本是否会有任何变化，但我看不出有任何理由会改变。|918373|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

You can install multiple versions of Python one machine, and during setup, you can choose to have one of them associate itself with Python file extensions. If you install modules, there will be different setup packages for different versions, or you can choose which version you want to target. Since they generally install themselves into the site-packages directory of the interpreter version, there shouldn't be any conflicts (but I haven't tested this). To choose which version of python, you would have to manually specify the path to the interpreter if it is not the default one. As far as I know, they would share the same PATH and PYTHONPATH variables, which may be a problem.

Note: I run Windows XP. I have no idea if any of this changes for other versions, but I don't see any reason that it would.

blocks|key|1133118|text|将你最常用的(在我的例子中是3.3)安装在另一个之上。这将迫使空闲使用您想要的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1133119|或者(从python3.3自述文件中)：|1133120|安装多个版本|1133121|在Unix和Mac系统上，如果您打算使用相同的安装前缀(配置脚本的--+prefix参数)安装多个版本的Python，则必须注意主python可执行文件不会被不同版本的安装覆盖。使用"make+altinstall“安装的所有文件和目录都包含主版本和次版本，因此可以并存。"make+install“还会创建${+prefix+}/bin/python3，它引用${prefix}/bin/pythonX.Y。如果您打算使用相同的前缀安装多个版本，则必须确定哪个版本(如果有)是您的”主“版本。使用"make+install“安装该版本。使用"make+altinstall“安装所有其他版本。|1133122|例如，如果你想安装Python2.6、2.7和3.3，并且2.7是主要版本，你可以在2.7构建目录中执行"make+install“，在其他目录中执行"make+altinstall”。|1133123|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|N|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|O|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

Install the one you use most (3.3 in my case) over the top of the other. That'll force IDLE to use the one you want.

Alternatively (from the python3.3 README):

<h2>Installing multiple versions</h2>

On Unix and Mac systems if you intend to install multiple versions of Python
using the same installation prefix (--prefix argument to the configure script)
you must take care that your primary python executable is not overwritten by the
installation of a different version. All files and directories installed using
"make altinstall" contain the major and minor version and can thus live
side-by-side. "make install" also creates ${prefix}/bin/python3 which refers to
${prefix}/bin/pythonX.Y. If you intend to install multiple versions using the
same prefix you must decide which version (if any) is your "primary" version.
Install that version using "make install". Install all other versions using
"make altinstall".

For example, if you want to install Python 2.6, 2.7 and 3.3 with 2.7 being the
primary version, you would execute "make install" in your 2.7 build directory
and "make altinstall" in the others.

blocks|key|1133145|text|从3.3版本开始Windows版本有Python启动器，请看3.4节。Python+Launcher+for+Windows|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1133146|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.python.org/3.3/using/windows.html#launcher^0|Z|R|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Starting version 3.3 Windows version has Python launcher, please take a look at section 3.4. <a href="https://docs.python.org/3.3/using/windows.html#launcher" rel="noreferrer">Python Launcher for Windows</a>

blocks|key|918518|text|如果你不能让其他任何东西工作，在你选择的任何版本中打开一个解释器(我更喜欢使用iPython)，然后：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|918519|import+subprocess

subprocess.call('python+script.py+-flags')|code-block|syntax|javascript|918520|这将使用您当前运行的任何python版本。对于单个脚本可以很好地工作，但是如果有很多脚本在运行，那么很快就会失去控制，在这种情况下，您总是可以创建一个包含所有这些调用的批处理文件。这不是最优雅的答案，但它是有效的。|918521|有没有办法像Linux一样为不同的python版本创建别名？|918522|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

If you can't get anything else to work, open an interpreter in whichever version you choose (I prefer using iPython) and:

<pre><code>import subprocess

subprocess.call('python script.py -flags')
</code></pre>

This uses whichever python version you are currently operating under. Works fine for a single script, but will quickly get out of hand if there are lots of scripts you run, in which case you can always make a batch file with all of these calls inside. Not the most elegant answer, but it works.

Is there a way to make aliases for different python version a la Linux?

blocks|key|918608|text|我只需要安装它们。然后我在http://defaultprogramseditor.com/的“文件类型设置”/“上下文菜单”/search：“py”下使用了免费的(可移植的)软件，选择了.py文件并为2个IDLE添加了一个'open‘命令，方法是复制现有的名为'open+with+IDLE’的命令，将名称改为IDLE+3.4.1/2.7.8，并在程序路径中替换它们各自版本的文件号。现在，我只需右击.py文件，选择我想使用的空闲文件。如果你愿意，也可以用直接解释器做同样的事情。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|918609|entityMap|0|LINK|mutability|MUTABLE|url|http://defaultprogramseditor.com/^0|D|X|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I just had to install them. Then I used the free (and portable) soft at <a href="http://defaultprogramseditor.com/" rel="nofollow">http://defaultprogramseditor.com/</a> under "File type settings"/"Context menu"/search:"py", chose .py file and added an 'open' command for the 2 IDLE by copying the existant command named 'open with IDLE, changing names to IDLE 3.4.1/2.7.8, and remplacing the files numbers of their respective versions in the program path. Now I have just to right click the .py file and chose which IDLE I want to use. Can do the same with direct interpreters if you prefer.

blocks|key|1133323|text|下面是你可以做的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1133324|安装cmder。打开并使用Cmder，就像使用cmd终端一样。使用命令别名创建命令别名。|offset|length|1133325|我做了以下工作：|1133326|alias+python2+=+c:\python27\python.exe
alias+python3+=+c:\python34\python.exe|code-block|syntax|javascript|1133327|就是这样！;-)|1133328|entityMap|0|LINK|mutability|MUTABLE|url|http://cmder.net/^0|0|2|5|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@$D|Y|E|Z|1|10]]|A|$]]|$1|F|3|G|5|6|7|11|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|12|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

Here's what you can do:

Install <a href="http://cmder.net/" rel="noreferrer">cmder</a>.
Open and use Cmder as you would with you cmd terminal.
Use the command alias to create command aliases.

I did the following:

<pre><code>alias python2 = c:\python27\python.exe
alias python3 = c:\python34\python.exe
</code></pre>

And that's it! ;-)

blocks|key|1133361|text|安装Python后检查你的系统环境变量，python3的目录应该在PATH变量的第一位，然后是python2。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1133362|首先匹配的path变量是Windows使用的变量。|1133363|和往常一样，py+-2将在此场景中启动python2。|1133364|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Check your system environment variables after installing Python, python 3's directories should be first in your PATH variable, then python 2.

Whichever path variable matches first is the one Windows uses.

As always py -2 will launch python2 in this scenario.

blocks|key|1133427|text|实际上，我刚刚想到了一个有趣的解决方案。虽然Windows不允许您轻松地为程序添加别名，但您可以改为创建将调用当前程序的重命名批处理文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1133428|在python2.exe所在的目录中创建python2.bat文件，而不是重命名可执行文件，这会破坏很多东西，包括pip。然后添加以下行：|1133429|%25~dp0python+%25*|code-block|syntax|javascript|1133430|这个古老的语法是什么意思？这是一个批处理脚本(bash的Windows版本)。%25~dp0获取当前目录，%25*将仅将传递给脚本的所有参数传递给python。|1133431|对python3.bat重复上述步骤|1133432|您也可以对pip和其他实用程序执行相同的操作，只需将文件中的单词python替换为pip或其他文件名即可。别名将是文件的任何名称。|1133433|最棒的是，当添加到路径中时，Windows会忽略正在运行的扩展|1133434|python3|1133435|将启动python3版本，命令python2将启动python2版本。|1133436|顺便说一句，这与Spyder将自身添加到Windows上的路径中所使用的技术相同。:)|1133437|entityMap^0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|11|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|14|8|@]|9|@]|A|$]]|$1|Q|3|R|5|F|7|15|8|@]|9|@]|A|$G|H]]|$1|S|3|T|5|6|7|16|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|17|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|X|$]]

I actually just thought of an interesting solution. While Windows will not allow you to easily alias programs, you can instead create renamed batch files that will call the current program.

Instead of renaming the executable which will break a lot of thing including pip, create the file python2.bat in the same directory as the python2.exe. Then add the following line:

<pre><code>%~dp0python %*
</code></pre>

What does this archaic syntax mean? Well, it's a batch script, (Windows version of bash). %~dp0 gets the current directory and %* will just pass all the arguments to python that were passed to the script. 

Repeat for python3.bat

You can also do the same for pip and other utilities, just replace the word python in the file with pip or whathever the filename. The alias will be whatever the file is named.

Best of all, when added to the PATH, Windows ignores the extension so running

<pre><code>python3
</code></pre>

Will launch the python3 version and and the command python2 will launch the python2 version.

BTW, this is the same technique Spyder uses to add itself to the path on Windows. :)

blocks|key|1133475|text|我按照这里的说明分三步完成了这一步:这都是直接从这里获取的：http://ipython.readthedocs.io/en/stable/install/kernel_install.html。我目前在Windows8上运行Python2.x，并安装了Anaconda+4.2.13。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1133476|1)首先安装最新版本的python：|1133477|conda+create+-n+python3+python=3+ipykernel|code-block|syntax|javascript|1133478|2)下一步激活python3|1133479|activate+python3|1133480|3)安装内核：|1133481|python+-m+ipykernel+install+--user|1133482|如果您已经安装了Python+3，并且想要安装2，请将上面的2和3互换。当您打开新的笔记本时，您现在可以在Python+2或3之间进行选择。|1133483|entityMap|0|LINK|mutability|MUTABLE|url|http://ipython.readthedocs.io/en/stable/install/kernel_install.html^0|U|1V|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|D|3|E|5|6|7|16|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|17|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|18|8|@]|9|@]|C|$]]|$1|M|3|N|5|H|7|19|8|@]|9|@]|C|$I|J]]|$1|O|3|P|5|6|7|1A|8|@]|9|@]|C|$]]|$1|Q|3|R|5|H|7|1B|8|@]|9|@]|C|$I|J]]|$1|S|3|T|5|6|7|1C|8|@]|9|@]|C|$]]|$1|U|3|-4|5|6|7|1D|8|@]|9|@]|C|$]]]|V|$W|$5|X|Y|Z|C|$10|11]]]]

I did this in three steps by following the instructions here: This is all taken directly from here: <a href="http://ipython.readthedocs.io/en/stable/install/kernel_install.html" rel="nofollow noreferrer">http://ipython.readthedocs.io/en/stable/install/kernel_install.html</a>. I'm currently running Python 2.x on Windows 8 and have Anaconda 4.2.13 installed. 

1) First install the latest version of python:

<pre><code>conda create -n python3 python=3 ipykernel
</code></pre>

2) Next activate python3

<pre><code>activate python3
</code></pre>

3) Install the kernel:

<pre><code>python -m ipykernel install --user
</code></pre>

If you have Python 3 installed and want to install 2, switch the 2 and the 3 above. When you open a new notebook, you can now choose between Python 2 or 3.

blocks|key|1133547|text|我已经在windows10pro上安装了python2.7.13和python3.6.1，当我尝试pip2或pip3时，我得到了同样的“致命错误”。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1133548|为了纠正这个问题，我转到Python2和Python3文件的python.exe位置，创建了每个文件的副本，然后根据安装文件夹中的python版本将每个副本重命名为python2.exe和python3.exe。因此，我在每个python安装文件夹中都有一个python.exe文件和一个python2.exe或python3.exe，具体取决于python版本。|1133549|这解决了我输入pip2或pip3时的问题。|1133550|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I have installed both python 2.7.13 and python 3.6.1 on windows 10pro and I was getting the same "Fatal error" when I tried pip2 or pip3. 

What I did to correct this was to go to the location of python.exe for python 2 and python 3 files and create a copy of each, I then renamed each copy to python2.exe and python3.exe depending on the python version in the installation folder. I therefore had in each python installation folder both a python.exe file and a python2.exe or python3.exe depending on the python version. 

This resolved my problem when I typed either pip2 or pip3.

I do most of my programming in Python 3.x on Windows 7, but now I need to use the Python Imaging Library (PIL), ImageMagick, and wxPython, all of which require Python 2.x.

Can I have both Python 2.x and Python 3.x installed in Windows 7? When I run a script, how would I "choose" which version of Python should run it? Will the aforementioned programs be able to handle multiple versions of Python installed at once? I have searched for hours and hours for how to do this to no avail.

Thanks.

How to install both Python 2.x and Python 3.x in Windows

解释器

Windows

Python

Linux

Unix

我在Windows7上使用Python3.x进行大部分编程，但现在我需要使用Python Imaging (PIL)、ImageMagick和wxPython，所有这些工具都需要Python2.x。我可以在Windows7中同时安装Python 2.x和Python 3.x吗？当我运行一个脚本时，我如何“选择”哪个版本...

问如何在Windows中同时安装Python 2.x和Python 3.x
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在Windows中同时安装Python 2.x和Python 3.xEN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在Windows中同时安装Python 2.x和Python 3.x
EN