blocks|key|885903|text|正如注释中所提到的，如果which+python受到CentOS的支持，您可以使用它。另一个可以工作的命令是whereis+python。在这两种情况下，您都可以启动Python解释器，它将显示版本，或者您可以在/usr/bin中查找Python文件(python、python3等)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|885904|entityMap^0|C|C|1I|E|2Y|8|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

As someone mentioned in a comment, you can use <code>which python</code> if it is supported by CentOS. Another command that could work is <code>whereis python</code>. In the event neither of these work, you can start the Python interpreter, and it will show you the version, or you could look in <code>/usr/bin</code> for the Python files (python, python3 etc).

blocks|key|1397332|text|执行下一个命令的方式越简单：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1397333|ls+-ls+/usr/bin/python*|code-block|syntax|javascript|1397334|输出如下：|1397335|/usr/bin/python+++++++++++/usr/bin/python2.7++++++++/usr/bin/pythonw
/usr/bin/python-config++++/usr/bin/python2.7-config+/usr/bin/pythonw2.7|1397336|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]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

The more easy way its by executing the next command:

<pre><code>ls -ls /usr/bin/python*
</code></pre>

Output look like this:

<pre><code>/usr/bin/python /usr/bin/python2.7 /usr/bin/pythonw
/usr/bin/python-config /usr/bin/python2.7-config /usr/bin/pythonw2.7
</code></pre>

blocks|key|1398645|text|通过发出命令Python+--+version：$+python+--版本Python2.7.10，了解安装了哪个版本的python|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1398646|如果您看到类似的情况，Python2.7是默认版本。您还可以看到是否安装了Python+3：|1398647|$+python3+--version
Python+3.7.2|code-block|syntax|javascript|1398648|如果您还想知道安装它的路径，可以使用python和python3发出“the”命令：|1398649|$+which+python
/usr/bin/python

$+which+python3
/usr/local/bin/python3|1398650|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Find out which version of Python is installed by issuing the command 
python --version:
 $ python --version
 Python 2.7.10

If you see something like this, Python 2.7 is your default version. You can also see if you have Python 3 installed:

<pre><code>$ python3 --version
Python 3.7.2
</code></pre>

If you also want to know the path where it is installed, you can issue the command "which" with python and python3:

<pre><code>$ which python
/usr/bin/python

$ which python3
/usr/local/bin/python3
</code></pre>

blocks|key|1397354|text|我们可以直接使用它查看当前用户和根用户通过以下方式安装的所有python：whereis+python|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1397355|entityMap^0|11|E|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

we can directly use this to see all the pythons installed both by current user and the root by the following: 
 <code>whereis python</code>

blocks|key|831591|text|这里有一个更清晰的方法来展示它们(从技术上讲，没有符号链接)。这包括python2和python3安装：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|831592|ls+-1+/usr/bin/python*+%7C+grep+'.*[2-3]$.[0-9]\%2B$\?$'|code-block|syntax|javascript|831593|其中，grep过滤末尾具有该数字模式的ls的输出($)。|offset|length|style|CODE|831594|或者使用find|831595|find+/usr/bin/python*+!+-type+l|831596|它显示了符号链接类型(!)的所有不同(-type+l)。|831597|entityMap^0|0|0|3|4|0|4|4|0|0|B|1|J|7|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@$I|X|J|Y|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|Z|8|@$I|10|J|11|K|L]]|9|@]|A|$]]|$1|O|3|P|5|D|7|12|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|13|8|@$I|14|J|15|K|L]|$I|16|J|17|K|L]]|9|@]|A|$]]|$1|S|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|T|$]]

Here is a cleaner way to show them (technically without symbolic links). This includes python2 and python3 installs:
<pre><code>ls -1 /usr/bin/python* | grep '.*[2-3]$.[0-9]\+$\?$'
</code></pre>
Where <code>grep</code> filters the output of ls that that has that numeric pattern at the end ($).
Or using <code>find</code>:
<pre><code>find /usr/bin/python* ! -type l
</code></pre>
Which shows all the different (<code>!</code>) of symbolic link type (<code>-type l</code>).

blocks|key|885964|text|这取决于默认版本的python设置。您可以通过Python版本进行查询：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|885965|python3+--version+//to+check+which+version+of+python3+is+installed+on+your+computer
python2+--version+//+to+check+which+version+of+python2+is+installed+on+your+computer
python+--version+//+it+shows+your+default+Python+installed+version.|code-block|syntax|javascript|885966|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

It depends on your default version of python setup. You can query by Python Version:

<pre><code>python3 --version //to check which version of python3 is installed on your computer
python2 --version // to check which version of python2 is installed on your computer
python --version // it shows your default Python installed version.
</code></pre>

blocks|key|1398693|text|命令：python+--version+&&+python3+--version|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1398694|产出：|1398695|Python+2.7.10
Python+3.7.1|blockquote|1398696|别名命令：pyver|1398697|1398698|Python+2.7.10
Python+3.7.1|1398699|您可以在.bashrc文件中创建类似于"pyver“的别名，或者使用文本加速器(例如AText+)。|1398700|entityMap^0|3|11|0|0|0|5|5|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|W|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|X|8|@]|D|@]|E|$]]|$1|K|3|L|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|M|3|G|5|6|7|11|8|@]|D|@]|E|$]]|$1|N|3|O|5|J|7|12|8|@]|D|@]|E|$]]|$1|P|3|Q|5|6|7|13|8|@]|D|@]|E|$]]|$1|R|3|-4|5|6|7|14|8|@]|D|@]|E|$]]]|S|$]]

COMMAND: <code>python --version &amp;&amp; python3 --version</code>

OUTPUT:

<blockquote>
 Python 2.7.10 
 Python 3.7.1
</blockquote>

ALIAS COMMAND: <code>pyver</code>

OUTPUT:

<blockquote>
 Python 2.7.10 
 Python 3.7.1
</blockquote>

You can make an alias like "pyver" in your .bashrc file or else using a text accelerator like AText maybe.

blocks|key|831679|text|compgen+-c+python+%7C+grep+-P+'%5Epython\d'|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|831680|这也列出了其他一些python的内容，但是您可以识别其中的所有python版本。|unstyled|831681|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre class="lang-sh prettyprint-override"><code>compgen -c python | grep -P '^python\d'
</code></pre>
This lists some other python things too, But hey, You can identify all python versions among them.

blocks|key|886042|text|筛选此脚本的输出。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|886043|sudo+find+/+-name+'python*'+-type+f++-exec+du+-h+{}++%2B+%7C+sort+-r+-h+~/Documents/python_locations.txt|code-block|syntax|javascript|886044|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Sift through the output of this script.
<pre><code>sudo find / -name 'python*' -type f -exec du -h {} + | sort -r -h ~/Documents/python_locations.txt
</code></pre>

blocks|key|831722|text|ls+-l+/usr/bin/python*+&+ls+-l+/usr/local/bin/python*|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|831723|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>ls -l /usr/bin/python* &amp; ls -l /usr/local/bin/python*
</code></pre>

blocks|key|1398725|text|我想加上@nurealam+siddiq的答案，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1398726|python+--version+//+it+shows+your+default+Python+installed+version.

python2+--version+//+to+check+which+version+of+python2+is+installed+

python3+--version+//to+check+which+version+of+python3+is+installed+

python3.X+--version+//+to+further+check+which+python3.X+is+installed|code-block|syntax|javascript|1398727|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I would add to @nurealam siddiq answer,
<pre><code>python --version // it shows your default Python installed version.

python2 --version // to check which version of python2 is installed 

python3 --version //to check which version of python3 is installed 

python3.X --version // to further check which python3.X is installed

</code></pre>

I just started setting up a centos server today and noticed that the default version of python on centos is set to 2.6.6. I want to use python 2.7 instead. I googled around and found that 2.6.6 is used by system tools such as YUM so I should not tamper with it. Then I opened up a terminal on my mac and found that I had python 2.6.8 and 2.7.5 and 3.3.3 installed. Sorry for the long story. In short I just want to know how to lookup all the version of python installed on centos so I don't accidentally install it twice.

How to check all versions of python installed on osx and centos

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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我今天刚开始设置一个centos服务器，并注意到在centos上的默认版本python设置为2.6.6。我想用python2.7代替。我搜索了一下，发现2.6.6被系统工具使用，比如YUM，所以我不应该篡改它。然后，我在mac上打开了一个终端，发现我安装了python2.6.8、2.7.5和3.3.3。很抱歉这么长时间...

问如何检查osx和centos上安装的python的所有版本
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问如何检查osx和centos上安装的python的所有版本EN