How to run a python script from IDLE interactive shell

Question

How do I run a python script from within the IDLE interactive shell    The following throws an error    gt  gt  gt  python helloworld py SyntaxError  invalid syntax

User · Answer

In IDLE  the following works  -   x000D   x000D  import helloworld x000D   x000D   x000D    I don t know much about why it works  but it does

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The IDLE shell window is not the same as a terminal shell  e g  running sh or bash    Rather  it is just like being in the Python interactive interpreter  python -i    The easiest way to run a script in IDLE is to use the Open command from the File menu  this may vary a bit depending on which platform you are running  to load your script file into an IDLE editor window and then use the Run -  Run Module command  shortcut F5

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There is one more alternative  for windows  -      import os     os system  py   lt path of program with extension gt

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Try this  import os import subprocess  DIR   os path join  C       Users    Sergey    Desktop    helloword py    subprocess call   python   DIR

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I tested this and it kinda works out    exec open  filename   read       Don t forget to put the filename between

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you can do it by two ways   import file name exec open  file name   read      but make sure that file should be stored where your program  is running

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EASIEST WAY  python -i helloworld py   Python 2  python3 -i helloworld py  Python 3

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To run a python script in a python shell such as Idle or in a Django shell you can do the following using the exec   function  Exec   executes a code object argument  A code object in Python is simply compiled Python code  So you must first compile your script file and then execute it using exec    From your shell     gt  gt  gt file to compile   open   path to your file py   read    gt  gt  gt code object   compile file to compile    lt string gt     exec    gt  gt  gt exec code object     I m using Python 3 4  See the compile and exec docs for detailed info

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For example   import subprocess  subprocess call  C  helloworld py    subprocess call   python    -h

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execFile  helloworld py   does the job for me  A thing to note is to enter the complete directory name of the  py file if it isnt in the Python folder itself  atleast this is the case on Windows   For example  execFile  C  helloworld py

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You can use this in python3   exec open filename  read

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In a python console  one can try the following 2 ways  under the same work directory  1   gt  gt  import helloworld   if you have a variable x  you can print it in the IDLE   gt  gt  helloworld x   if you have a function func  you can also call it like this   gt  gt  helloworld func   2   gt  gt  runfile  quot   helloworld py quot

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On Windows environment  you can execute py file on Python3 shell command line with the following syntax      exec open  absolute path to file name   read      Below explains how to execute a simple helloworld py file from python shell command line     File Location  C  Users testuser testfolder helloworld py      File Content  print  hello world     We can execute this file on Python3 7 Shell as below    gt  gt  gt  import os  gt  gt  gt  abs path    C   Users testuser testfolder   gt  gt  gt  os chdir abs path   gt  gt  gt  os getcwd    C   Users  testuser  testfolder    gt  gt  gt  exec open  helloworld py   read    hello world   gt  gt  gt  exec open  C   Users  testuser  testfolder  helloworld py   read    hello world   gt  gt  gt  os path abspath  helloworld py    C   Users  testuser  testfolder  helloworld py   gt  gt  gt  import helloworld hello world

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Python3   exec open  helloworld py   read      If your file not in the same dir   exec open    app filename py   read      See https   stackoverflow com a 437857 739577 for passing global local variables     In deprecated Python versions  Python2 Built-in function  execfile  execfile  helloworld py     It normally cannot be called with arguments  But here s a workaround   import sys sys argv     helloworld py    arg      argv 0  should still be the script name execfile  helloworld py       Deprecated since 2 6  popen  import os os popen  python helloworld py     Just run the program os popen  python helloworld py   read     Also gets you the stdout   With arguments   os popen  python helloworld py arg   read       Advance usage  subprocess  import subprocess subprocess call   python    helloworld py      Just run the program subprocess check output   python    helloworld py      Also gets you the stdout   With arguments   subprocess call   python    helloworld py    arg      Read the docs for details  -     Tested with this basic helloworld py   import sys if len sys argv   gt  1      print sys argv 1

User · Answer

In Python 3  there is no execFile  One can use exec built-in function  for instance   import helloworld exec  helloworld

[python] How to run a python script from IDLE interactive shell?

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