How do I run a Python program

Question

So I m starting like Python a bit  but I m having trouble erm   running it  Lol  I m using IDLE for now  but its no use whatsoever because you can only run a couple of lines at a time   I m also using Komodo Edit to create the actual  py files   My question is  how can I run the  py files to test out the actual program    I m using Windows 7  and Komodo Edit 5 as my IDE  Pressing F5 in Komodo doesn t do anythin at all

User · Answer

I have tried many of the commands listed above, however none worked, even after setting my path to include the directory where I installed Python.

The command py -3 file.py always works for me, and if I want to run Python 2 code, as long as Python 2 is in my path, just changing the command to py -2 file.py works perfectly.

I am using Windows, so I'm not too sure if this command will work on Linux, or Mac, but it's worth a try.

User · Answer

I m very glad you asked  I was just working on explaining this very thing in our wikibook  which is obviously incomplete    We re working with Python novices  and had to help a few through exactly what you re asking     Command-line Python in Windows     Save your python code file somewhere  using  Save  or  Save as  in your editor   Lets call it  first py  in some folder  like  pyscripts  that you make on your Desktop  Open a prompt  a Windows  cmd  shell that is a text interface into the computer       start   run    cmd   in the little box    OK       Navigate to where your python file is  using the commands  cd   change directory  and  dir   to show files in the directory  to verify your head    For our example something like      cd C  Documents and Settings Gregg Desktop pyscripts try     python first py   If you get this message         python  is not recognized as an   internal or external command  operable   program or batch file    then python  the interpreter program that can translate Python into  computer instructions   isn t on your path  see Putting Python in Your Path below    Then try calling it like this  assuming Python2 6  installed in the usual location      C  Python26 python exe first py   Advanced users   instead of first py  you could write out first py s full path of C  Documents and Settings Gregg Desktop pyscripts first py   Putting Python In Your Path  Windows  In order to run programs  your operating system looks in various places  and tries to match the name of the program   command you typed with some  programs along the way     In windows   control panel   system    advanced    Environmental Variables    system variables -  Path  this needs to include   C  Python26   or equivalent    If you put it at the front  it will be the first place looked   You can also add it at the end  which is possibly saner   Then restart your prompt  and try typing  python    If it all worked  you should get a       prompt

User · Answer

You can just call  python  path to filename py

User · Answer

If this helps anyone  neither  python  filename  py  or  python exe  filename py   worked for me  but  start python  filename  py  did  If anyone else is experiencing issues with the former two commands  try the latter one

User · Answer

If you want to run the    py  file just write in print   in your code to actually see it get printed   Unlike python IDLE  you need to specify what you want to print using print   command   For eg    import os os getcwd   a  1 2 3 4 5  name   Python    Use print   function print a  print name    OUTPUT  1  2  3  4  5  Python

User · Answer

if you dont want call filename py you can add  PY to the PATHEXT  that way you will just call filename

User · Answer

Navigate your file location just press Shift button and click file name  Click tab Open command window here and write in your command prompt python file name py

User · Answer

Python itself comes with an editor that you can access from the IDLE File   New File menu option   Write the code in that file  save it as  filename  py and then  in that same file editor window  press F5 to execute the code you created in the IDLE Shell window   Note  it s just been the easiest and most straightforward way for me so far

User · Answer

In IDLE press F5  You can open your  py file with IDLE and press F5 to run it    You can open that same file with other editor   like Komodo as you said   save it and press F5 again  F5 works with IDLE   even when the editing is done with another tool     If you want to run it directly from Komodo according to this article  Executing Python Code Within Komodo Edit you have to    go to Toolbox -  Add -  New Command    in the top field enter the name  Run Python file  in the  Command  field enter this text     python   F 3 a optionall click on the  Key Binding  tab and assign a key command to this command click Ok

User · Answer

What I just did  to open a simple python script by double clicking  I just added a batch file to the directory containing the script    echo off python exercise py pause gt nul    I have the python executable on my system path  If not one would need include its complete path of course    Then I just can double click on the batch file to run the script  The third line keeps the cmd window from being dismissed as soon as the script ends  so you can see the results     When you re done just close the command window

[python] How do I run a Python program?

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