Which version of Python do I have installed

Question

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

User · Answer

Mostly usage commands   python -version   Or  python -V

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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

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For bash scripts this would be the easiest way    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   And if you just need the major minor version  e g  3 6  you can either use the above and then pick the first 3 characters  PYTHON VERSION  python3 --version   awk   print  2    echo  quot python3 major minor    PYTHON VERSION 0 3  quot  python3 major minor  3 6  or 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

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In short      Type python in a command prompt   Simply open the command prompt  Win   R  and type cmd and in the command prompt then typing python will give you all necessary information regarding versions

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Python 2 5    python --version   Python 2 4-   python -c  import sys  print sys version

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On Windows 10 with Python 3 9 1  using the command line      py -V  Python 3 9 1      py --version  Python 3 9 1

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If you are already in a REPL window and don t see the welcome message with the version number  you can use help   to see the major and minor version    gt  gt  gt help   Welcome to Python 3 6 s help utility

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When I open Python  command line  the first thing it tells me is the version

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To check the Python version in a Jupyter notebook  you can use   from platform import python version print python version      to get version number  as   3 7 3   or   import sys print sys version    to get more information  as  3 7 3  default  Apr 24 2019  13 20 13   MSC v 1915 32 bit  Intel     or   sys version info   to get major  minor and micro versions  as  sys version info major 3  minor 7  micro 3  releaselevel  final   serial 0

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python -V   http   docs python org using cmdline html generic-options  --version may also work  introduced in version 2 5

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At a command prompt type   python -V   Or if you have pyenv   pyenv versions

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Use  python -V   or  python --version   NOTE  Please note that the  V  in the python -V command is capital V  python -v  small  v   will launch Python in verbose mode

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For me  opening CMD and running  py   will show something like  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

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Just create a file ending with  py and paste the code below into and run it      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         If several Python interpreter versions are installed on a system  run the following commands   On Linux  run in a terminal   ll  usr bin python    On Windows  run in a command prompt   dir  LOCALAPPDATA  Programs Python

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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

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Open a command prompt window  press Windows   R  type in cmd  and hit Enter    Type python exe

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You can get the version of Python by using the following command  python --version   You can even get the version of any package installed in venv using pip freeze as   pip freeze   grep  package name    Or using the Python interpreter as   In  1   import django In  2   django VERSION Out 2    1  6  1   final   0

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In a Python IDE  just copy and paste in the following code and run it  the version will come up in the output area    import sys print sys version

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I have Python 3 7 0 on Windows 10   This is what worked for me in the command prompt and Git Bash   To run Python and check the version   py   To only check which version you have   py --version   or  py -V      Make sure it is a capital V   Note  python  python --version  python -V Python  Python --version  Python -V did not work for me

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gt  gt  gt  import sys  print   0 0    0 1    format sys version info   3 5   so from the command line   python -c  import sys  print   0 0    0 1    format sys version info

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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   updatedb                    Be in root for this locate site py              All installations I ve ever seen have this   The output for a single Python installation should look something like this    usr lib64 python2 7 site py  usr lib64 python2 7 site pyc  usr lib64 python2 7 site pyo   Multiple installations will have output something like this    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

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Typing where python 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 python -V into the Command Prompt should display the version

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To verify the Python version for commands on Windows  run the following commands in a command prompt and verify the output   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   Also  to see the folder configuration for each Python version  run the following commands   For Python 2   py -2 -m site  For Python 3   py -3 -m site

[python] Which version of Python do I have installed?

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