blocks|key|674447|text|python+-V|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|674448|http://docs.python.org/using/cmdline.html#generic-options|unstyled|offset|length|674449|--version也可以工作(在2.5版中引入)|style|CODE|674450|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1L|0|0|0|9|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|U|8|@]|9|@$G|V|H|W|1|X]]|A|$]]|$1|I|3|J|5|F|7|Y|8|@$G|Z|H|10|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|F|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|E]]]]

<pre><code>python -V
</code></pre>

<a href="http://docs.python.org/using/cmdline.html#generic-options">http://docs.python.org/using/cmdline.html#generic-options</a>

<code>--version</code> may also work (introduced in version 2.5)

blocks|key|674460|text|Python+2.5%2B：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|674461|python+--version|code-block|syntax|javascript|674462|Python+2.4-：|674463|python+-c+'import+sys;+print(sys.version)'|674464|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|$]]

Python 2.5+:

<pre><code>python --version
</code></pre>

Python 2.4-:

<pre><code>python -c 'import sys; print(sys.version)'
</code></pre>

blocks|key|460212|text|在命令提示符下键入：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|460213|python+-V|code-block|syntax|javascript|460214|或者如果你有pyenv：|460215|pyenv+versions|460216|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|$]]

At a command prompt type:

<pre><code>python -V
</code></pre>

Or if you have pyenv:

<pre><code>pyenv versions
</code></pre>

blocks|key|460244|text|当我打开Python+(command+line)时，它告诉我的第一件事是版本。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|460245|entityMap^0|4|L|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|$]]

When I open <code>Python (command line)</code> the first thing it tells me is the version.

blocks|key|460307|text|在Python+IDE中，只需复制并粘贴以下代码并运行它(版本将出现在输出区域中)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|460308|import+sys
print(sys.version)|code-block|syntax|javascript|460309|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|$]]

In a Python IDE, just copy and paste in the following code and run it (the version will come up in the output area):

<pre><code>import sys
print(sys.version)
</code></pre>

blocks|key|674667|text|您可以使用以下命令获取Python的版本|type|unstyled|depth|inlineStyleRanges|entityRanges|data|674668|python+--version|code-block|syntax|javascript|674669|您甚至可以使用pip+freeze获取venv中安装的任何包的版本：|offset|length|style|CODE|674670|pip+freeze+%7C+grep+"package+name"|674671|或者像这样使用Python解释器：|674672|In+[1]:+import+django
In+[2]:+django.VERSION
Out[2]:+(1,+6,+1,+'final',+0)|674673|entityMap^0|0|0|7|A|0|0|0|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|$]]|$1|M|3|N|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|10|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

You can get the version of Python by using the following command

<pre><code>python --version
</code></pre>

You can even get the version of any package installed in venv using <code>pip freeze</code> as:

<pre><code>pip freeze | grep "package name"
</code></pre>

Or using the Python interpreter as:

<pre><code>In [1]: import django
In [2]: django.VERSION
Out[2]: (1, 6, 1, 'final', 0)
</code></pre>

blocks|key|674710|text|尽管问题是“我使用的是哪个版本？”，但这可能不是您需要知道的所有内容。您可能安装了其他版本，这可能会导致问题，特别是在安装其他模块时。这是我用来找出安装了哪些版本的粗略方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|674711|updatedb++++++++++++++++++#+Be+in+root+for+this
locate+site.py++++++++++++#+All+installations+I've+ever+seen+have+this|code-block|syntax|javascript|674712|单个Python安装的输出应如下所示：|674713|/usr/lib64/python2.7/site.py
/usr/lib64/python2.7/site.pyc
/usr/lib64/python2.7/site.pyo|674714|多个安装将具有类似以下内容的输出：|674715|/root/Python-2.7.6/Lib/site.py
/root/Python-2.7.6/Lib/site.pyc
/root/Python-2.7.6/Lib/site.pyo
/root/Python-2.7.6/Lib/test/test_site.py
/usr/lib/python2.6/site-packages/site.py
/usr/lib/python2.6/site-packages/site.pyc
/usr/lib/python2.6/site-packages/site.pyo
/usr/lib64/python2.6/site.py
/usr/lib64/python2.6/site.pyc
/usr/lib64/python2.6/site.pyo
/usr/local/lib/python2.7/site.py
/usr/local/lib/python2.7/site.pyc
/usr/local/lib/python2.7/site.pyo
/usr/local/lib/python2.7/test/test_site.py
/usr/local/lib/python2.7/test/test_site.pyc
/usr/local/lib/python2.7/test/test_site.pyo|674716|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Although the question is "which version am I using?", this may not actually be everything you need to know. You may have other versions installed and this can cause problems, particularly when installing additional modules. This is my rough-and-ready approach to finding out what versions are installed:

<pre><code>updatedb # Be in root for this
locate site.py # All installations I've ever seen have this
</code></pre>

The output for a single Python installation should look something like this:

<pre><code>/usr/lib64/python2.7/site.py
/usr/lib64/python2.7/site.pyc
/usr/lib64/python2.7/site.pyo
</code></pre>

Multiple installations will have output something like this:

<pre><code>/root/Python-2.7.6/Lib/site.py
/root/Python-2.7.6/Lib/site.pyc
/root/Python-2.7.6/Lib/site.pyo
/root/Python-2.7.6/Lib/test/test_site.py
/usr/lib/python2.6/site-packages/site.py
/usr/lib/python2.6/site-packages/site.pyc
/usr/lib/python2.6/site-packages/site.pyo
/usr/lib64/python2.6/site.py
/usr/lib64/python2.6/site.pyc
/usr/lib64/python2.6/site.pyo
/usr/local/lib/python2.7/site.py
/usr/local/lib/python2.7/site.pyc
/usr/local/lib/python2.7/site.pyo
/usr/local/lib/python2.7/test/test_site.py
/usr/local/lib/python2.7/test/test_site.pyc
/usr/local/lib/python2.7/test/test_site.pyo
</code></pre>

blocks|key|460464|text|使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|460465|python+-V|code-block|syntax|javascript|460466|或|460467|python+--version|460468|注意:请注意，Python命令中的"+V“是大写V。python+-v+(小"v")将在详细模式下启动python+-V。|offset|length|style|CODE|460469|entityMap^0|0|0|0|0|Q|9|1F|9|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|W|8|@$M|X|N|Y|O|P]|$M|Z|N|10|O|P]]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|R|$]]

Use

<pre><code>python -V
</code></pre>

or

<pre><code>python --version
</code></pre>

NOTE: Please note that the "V" in the <code>python -V</code> command is capital V. <code>python -v</code> (small "v") will launch Python in verbose mode.

blocks|key|674807|text|对我来说，打开CMD并运行|type|unstyled|depth|inlineStyleRanges|entityRanges|data|674808|py|code-block|syntax|javascript|674809|将显示如下内容|674810|Python+3.4.3+(v3.4.3:9b73f1c3e601,+Feb+24+2015,+22:43:06)+[MSC+v.1600+32+bit+(Intel)]+on+win32

Type+"help",+"copyright",+"credits"+or+"license"+for+more+information.|674811|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|$]]

For me, opening CMD and running

<pre><code>py
</code></pre>

will show something like

<pre class="lang-none prettyprint-override"><code>Python 3.4.3 (v3.4.3:9b73f1c3e601, Feb 24 2015, 22:43:06) [MSC v.1600 32 bit (Intel)] on win32

Type "help", "copyright", "credits" or "license" for more information.
</code></pre>

blocks|key|674862|text|In+[1]:+import+sys

In+[2]:+sys.version
2.7.11+%7CAnaconda+2.5.0+(64-bit)%7C+(default,+Dec++6+2015,+18:08:32)+
[GCC+4.4.7+20120313+(Red+Hat+4.4.7-1)]

In+[3]:+sys.version_info
sys.version_info(major=2,+minor=7,+micro=11,+releaselevel='final',+serial=0)

In+[4]:+sys.version_info+>=+(2,7)
Out[4]:+True

In+[5]:+sys.version_info+>=+(3,)
Out[5]:+False|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|674863|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>In [1]: import sys

In [2]: sys.version
2.7.11 |Anaconda 2.5.0 (64-bit)| (default, Dec 6 2015, 18:08:32) 
[GCC 4.4.7 20120313 (Red Hat 4.4.7-1)]

In [3]: sys.version_info
sys.version_info(major=2, minor=7, micro=11, releaselevel='final', serial=0)

In [4]: sys.version_info &gt;= (2,7)
Out[4]: True

In [5]: sys.version_info &gt;= (3,)
Out[5]: False
</code></pre>

blocks|key|674889|text|>>>+import+sys;+print('{0[0]}.{0[1]}'.format(sys.version_info))
3.5|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|674890|因此，在命令行中：|unstyled|674891|python+-c+"import+sys;+print('{0[0]}.{0[1]}'.format(sys.version_info))"|674892|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>&gt;&gt;&gt; import sys; print('{0[0]}.{0[1]}'.format(sys.version_info))
3.5
</code></pre>

so from the command line:

<pre><code>python -c "import sys; print('{0[0]}.{0[1]}'.format(sys.version_info))"
</code></pre>

blocks|key|460616|text|在装有Python+3.9.1的Windows+10上，使用命令行：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|460617|++++py+-V

Python+3.9.1

++++py+--version

Python+3.9.1

++++py+-VV

Python+3.9.1+(tags/v3.9.1:1e5d33e,+Dec++7+2020,+17:08:21)+[MSC+v.1927+64+bit+
(AMD64)]|code-block|syntax|javascript|460618|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|$]]

On Windows 10 with Python 3.9.1, using the command line:
<pre><code> py -V

Python 3.9.1

 py --version

Python 3.9.1

 py -VV

Python 3.9.1 (tags/v3.9.1:1e5d33e, Dec 7 2020, 17:08:21) [MSC v.1927 64 bit 
(AMD64)]
</code></pre>

blocks|key|460678|text|如果您已经安装了Python，那么检查版本号的最简单方法就是在命令提示符下输入"python“。它将向您显示版本号，以及它是在32位还是64位上运行以及一些其他信息。对于某些应用程序，您可能希望有最新的版本，但有时不是。这取决于您想要安装或使用的包。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|460679|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

If you have Python installed then the easiest way you can check the version number is by typing "python" in your command prompt. It will show you the version number and if it is running on 32 bit or 64 bit and some other information. For some applications you would want to have a latest version and sometimes not. It depends on what packages you want to install or use.

blocks|key|460724|text|只需创建一个以.py结尾的文件，并将以下代码粘贴到中并运行它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|460725|#!/usr/bin/python3.6

import+platform
import+sys

def+linux_dist():
++try:
++++return+platform.linux_distribution()
++except:
++++return+"N/A"

print("""Python+version:+%25s
dist:+%25s
linux_distribution:+%25s
system:+%25s
machine:+%25s
platform:+%25s
uname:+%25s
version:+%25s
"""+%25+(
sys.version.split('\n'),
str(platform.dist()),
linux_dist(),
platform.system(),
platform.machine(),
platform.platform(),
platform.uname(),
platform.version(),
))|code-block|syntax|javascript|460726|如果系统上安装了多个Python解释器版本，请运行以下命令。|460727|在Linux上，在终端中运行：|460728|ll+/usr/bin/python*|460729|在Windows上，在命令提示符下运行：|460730|dir+%25LOCALAPPDATA%25\Programs\Python|460731|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|W|8|@]|9|@]|A|$E|F]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|Y|8|@]|9|@]|A|$E|F]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Just create a file ending with .py and paste the code below into and run it.

<pre><code>#!/usr/bin/python3.6

import platform
import sys

def linux_dist():
 try:
 return platform.linux_distribution()
 except:
 return "N/A"

print("""Python version: %s
dist: %s
linux_distribution: %s
system: %s
machine: %s
platform: %s
uname: %s
version: %s
""" % (
sys.version.split('\n'),
str(platform.dist()),
linux_dist(),
platform.system(),
platform.machine(),
platform.platform(),
platform.uname(),
platform.version(),
))
</code></pre>

If several Python interpreter versions are installed on a system, run the following commands.

On Linux, run in a terminal:

<pre><code>ll /usr/bin/python*
</code></pre>

On Windows, run in a command prompt:

<pre><code>dir %LOCALAPPDATA%\Programs\Python
</code></pre>

blocks|key|460818|text|我在Windows10上安装了Python+3.7.0。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|460819|这就是我在命令提示符和Git+Bash中工作的方法|offset|length|460820|要运行Python并检查版本：|460821|py|code-block|syntax|javascript|460822|要仅检查您的版本：|460823|py+--version|460824|或|460825|py+-V++++#+Make+sure+it+is+a+capital+V|460826|注意：python、python+--version、python+-V、Python、Python+--version、Python+-V不适用于我。|style|CODE|460827|entityMap|0|LINK|mutability|MUTABLE|url|https://superuser.com/questions/1053633^0|0|B|8|0|0|0|0|0|0|0|0|3|6|A|G|R|9|11|6|18|G|1P|9|0^^$0|@$1|2|3|4|5|6|7|16|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|17|8|@]|9|@$D|18|E|19|1|1A]]|A|$]]|$1|F|3|G|5|6|7|1B|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|1C|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|1D|8|@]|9|@]|A|$]]|$1|O|3|P|5|J|7|1E|8|@]|9|@]|A|$K|L]]|$1|Q|3|R|5|6|7|1F|8|@]|9|@]|A|$]]|$1|S|3|T|5|J|7|1G|8|@]|9|@]|A|$K|L]]|$1|U|3|V|5|6|7|1H|8|@$D|1I|E|1J|W|X]|$D|1K|E|1L|W|X]|$D|1M|E|1N|W|X]|$D|1O|E|1P|W|X]|$D|1Q|E|1R|W|X]|$D|1S|E|1T|W|X]]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|1U|8|@]|9|@]|A|$]]]|Z|$10|$5|11|12|13|A|$14|15]]]]

I have Python 3.7.0 on Windows 10.

This is what worked for me in the command prompt and <a href="https://superuser.com/questions/1053633">Git Bash</a>:

To run Python and check the version:

<pre><code>py
</code></pre>

To only check which version you have:

<pre><code>py --version
</code></pre>

or

<pre><code>py -V # Make sure it is a capital V
</code></pre>

Note: <code>python</code>, <code>python --version</code>, <code>python -V</code>,<code>Python</code>, <code>Python --version</code>, <code>Python -V</code> did not work for me.

blocks|key|460887|text|如果您已经在REPL窗口中，但没有看到带有版本号的欢迎消息，则可以使用help()查看主要版本和次要版本：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|460888|>>>help()
Welcome+to+Python+3.6's+help+utility!
...|code-block|syntax|javascript|460889|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Read-eval-print_loop^0|6|4|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

If you are already in a <a href="http://en.wikipedia.org/wiki/Read-eval-print_loop" rel="nofollow noreferrer">REPL</a> window and don't see the welcome message with the version number, you can use help() to see the major and minor version:

<pre class="lang-none prettyprint-override"><code>&gt;&gt;&gt;help()
Welcome to Python 3.6's help utility!
...
</code></pre>

blocks|key|460926|text|要验证Windows上命令的Python版本，请在命令提示符下运行以下命令并验证输出：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|460927|c:\>+python+-V
Python+2.7.16

c:\>+py+-2+-V
Python+2.7.16

c:\>+py+-3+-V
Python+3.7.3|code-block|syntax|javascript|460928|此外，要查看每个Python版本的文件夹配置，请运行以下命令：|460929|For+Python+2,+'py+-2+-m+site'
For+Python+3,+'py+-3+-m+site'|460930|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|$]]

To verify the Python version for commands on Windows, run the following commands in a command prompt and verify the output:

<pre class="lang-none prettyprint-override"><code>c:\&gt; python -V
Python 2.7.16

c:\&gt; py -2 -V
Python 2.7.16

c:\&gt; py -3 -V
Python 3.7.3
</code></pre>

Also, to see the folder configuration for each Python version, run the following commands:

<pre class="lang-none prettyprint-override"><code>For Python 2, 'py -2 -m site'
For Python 3, 'py -3 -m site'
</code></pre>

blocks|key|460960|text|要在Jupyter笔记本中检查Python版本，您可以使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|460961|from+platform+import+python_version
print(python_version())|code-block|syntax|javascript|460962|要获取版本号，请执行以下操作：|460963|3.7.3|460964|或者：|460965|import+sys
print(sys.version)|460966|要获取更多信息，请参阅|460967|3.7.3+(default,+Apr+24+2019,+13:20:13)+[MSC+v.1915+32+bit+(Intel)]|460968|460969|sys.version_info|460970|要获取主要、次要和微型版本，请执行以下操作|460971|sys.version_info(major=3,+minor=7,+micro=3,+releaselevel='final',+serial=0)|460972|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|12|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|13|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|14|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|15|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|16|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|17|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|18|8|@]|9|@]|A|$E|F]]|$1|S|3|L|5|6|7|19|8|@]|9|@]|A|$]]|$1|T|3|U|5|D|7|1A|8|@]|9|@]|A|$E|F]]|$1|V|3|W|5|6|7|1B|8|@]|9|@]|A|$]]|$1|X|3|Y|5|D|7|1C|8|@]|9|@]|A|$E|F]]|$1|Z|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]]|10|$]]

To check the Python version in a Jupyter notebook, you can use:

<pre><code>from platform import python_version
print(python_version())
</code></pre>

to get version number, as:

<pre><code>3.7.3
</code></pre>

or:

<pre><code>import sys
print(sys.version)
</code></pre>

to get more information, as

<pre><code>3.7.3 (default, Apr 24 2019, 13:20:13) [MSC v.1915 32 bit (Intel)]
</code></pre>

or:

<pre><code>sys.version_info
</code></pre>

to get major, minor and micro versions, as

<pre><code>sys.version_info(major=3, minor=7, micro=3, releaselevel='final', serial=0)
</code></pre>

blocks|key|461017|text|在命令提示符中输入where+python可能会告诉您安装了多个不同版本的python的位置，假设它们已经添加到您的路径中。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|461018|在命令提示符下键入python+-V应会显示版本。|461019|entityMap^0|9|C|0|9|9|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|P|8|@]|D|@]|E|$]]]|I|$]]

Typing <code>where python</code> on Windows into a Command Prompt may tell you where multiple different versions of python are installed, assuming they have been added to your path.

Typing <code>python -V</code> into the Command Prompt should display the version.

blocks|key|461026|text|最常用的命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|461027|python+-version|code-block|syntax|javascript|461028|或|461029|python+-V|461030|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|$]]

Mostly usage commands:

<pre class="lang-sh prettyprint-override"><code>python -version
</code></pre>

Or

<pre class="lang-csh prettyprint-override"><code>python -V
</code></pre>

blocks|key|461076|text|对于bash脚本，这是最简单的方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|461077|#+In+the+form+major.minor.micro+e.g.+'3.6.8'
#+The+second+part+excludes+the+'Python+'+prefix+
PYTHON_VERSION=`python3+--version+%7C+awk+'{print+$2}'`
echo+"python3+version:+${PYTHON_VERSION}"
python3+version:+3.6.8|code-block|syntax|javascript|461078|461079|如果您只需要major.minor版本(例如3.6)，您可以使用上面的代码，然后选择前3个字符：|offset|length|style|CODE|461080|PYTHON_VERSION=`python3+--version+%7C+awk+'{print+$2}'`
echo+"python3+major.minor:+${PYTHON_VERSION:0:3}"
python3+major.minor:+3.6|461081|或|461082|PYTHON_VERSION=`python3+-c+'import+sys;+print(str(sys.version_info[0])%2B"."%2Bstr(sys.version_info[1]))'`
echo+"python3+major.minor:+${PYTHON_VERSION}"
python3+major.minor:+3.6|461083|entityMap^0|0|0|0|6|B|M|3|0|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|W|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|X|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|Y|8|@$J|Z|K|10|L|M]|$J|11|K|12|L|M]]|9|@]|A|$]]|$1|N|3|O|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|P|3|Q|5|6|7|14|8|@]|9|@]|A|$]]|$1|R|3|S|5|D|7|15|8|@]|9|@]|A|$E|F]]|$1|T|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|U|$]]

For bash scripts this would be the easiest way:
<pre><code># In the form major.minor.micro e.g. '3.6.8'
# The second part excludes the 'Python ' prefix 
PYTHON_VERSION=`python3 --version | awk '{print $2}'`
echo &quot;python3 version: ${PYTHON_VERSION}&quot;
python3 version: 3.6.8
</code></pre>
<hr />
And if you just need the <code>major.minor</code> version (e.g. <code>3.6</code>) you can either use the above and then pick the first 3 characters:
<pre><code>PYTHON_VERSION=`python3 --version | awk '{print $2}'`
echo &quot;python3 major.minor: ${PYTHON_VERSION:0:3}&quot;
python3 major.minor: 3.6
</code></pre>
or
<pre><code>PYTHON_VERSION=`python3 -c 'import sys; print(str(sys.version_info[0])+&quot;.&quot;+str(sys.version_info[1]))'`
echo &quot;python3 major.minor: ${PYTHON_VERSION}&quot;
python3 major.minor: 3.6
</code></pre>

blocks|key|461107|text|Windows上的默认Python版本和所有已安装版本的路径：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|461108|py+-0p|code-block|syntax|javascript|461109|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|$]]

The default Python version and the paths of all installed versions on Windows:
<pre><code>py -0p
</code></pre>

I have to run a Python script on a Windows server. How can I know which version of Python I have, and does it even really matter?

I was thinking of updating to the latest version of Python.

Which version of Python do I have installed?

服务器

解释器

Windows

Python

Linux

我必须在Windows服务器上运行Python脚本。我怎么知道我使用的是哪个版本的Python，这真的很重要吗？我在考虑更新到最新版本的Python。

问我安装了哪个版本的Python？
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