How to execute a file within the python interpreter

Question

I m trying to execute a file with python commands from within the interpreter    EDIT  I m trying to use variables and settings from that file  not to invoke a separate process

User · Accepted Answer

Several ways   From the shell  python someFile py   From inside IDLE  hit F5   If you re typing interactively  try this   Python 2 only     gt  gt  gt  variables      gt  gt  gt  execfile   someFile py   variables    gt  gt  gt  print variables   globals from the someFile module   For Python3  use      gt  gt  gt  exec open  filename py   read

User · Answer

python -c  quot exec open  main py   read    quot

User · Answer

I m trying to use variables and settings from that file  not to invoke a separate process    Well  simply importing the file with import filename  minus  py  needs to be in the same directory or on your PYTHONPATH  will run the file  making its variables  functions  classes  etc  available in the filename variable namespace   So if you have cheddar py with the variable spam and the function eggs     you can import them with import cheddar  access the variable with cheddar spam and run the function by calling cheddar eggs    If you have code in cheddar py that is outside a function  it will be run immediately  but building applications that runs stuff on import is going to make it hard to reuse your code  If a all possible  put everything inside functions or classes

User · Answer

Python 2   Python 3  exec open    path to script py   read    globals      This will execute a script and put all it s global variables in the interpreter s global scope  the normal behavior in most scripting environments    Python 3 exec Documentation

User · Answer

For python3 use either with xxxx   name of yourfile    exec open    xxxx py   read

User · Answer

Surprised I haven t seen this yet  You can execute a file and then leave the interpreter open after execution terminates using the -i option     foo py   ---------- testvar   10  def bar bing     return bing 3  --------      python -i foo py  gt  gt  gt  testvar  10  gt  gt  gt  bar 6  18

User · Answer

Supposing you desire the following features    Source file behaves properly in your debugger  filename shows in stack  etc    name         main    is True so scripts behave properly as scripts    The exec open  foo py   read    fails feature 1 The import foo strategy fails feature 2  To get both  you need this       source   open filename  read       code   compile source  filename   exec       exec code

User · Answer

For Python 3    gt  gt  gt  exec open  helloworld py   read      Make sure that you re in the correct directory before running the command   To run a file from a different directory  you can use the below command   with open   C   Users  UserName  SomeFolder  helloworld py    r   as file      exec file read

User · Answer

For Python 2    gt  gt  gt  execfile  filename py     For Python 3    gt  gt  gt  exec open  filename py   read      or  gt  gt  gt  from pathlib import Path  gt  gt  gt  exec Path  filename py   read text      See the documentation  If you are using Python 3 0  see this question   See answer by  S Lott for an example of how you access globals from filename py after executing it

User · Answer

I am not an expert but this is what I noticed   if your code is mycode py for instance  and you type just  import mycode   Python will execute it but it will not make all your variables available to the interpreter   I found that you should type actually  from mycode import    if you want to make all variables available to the interpreter

User · Answer

Just do   from my file import     Make sure not to add  py extension  If your  py file in subdirectory use   from my dir my file import

User · Answer

From my view  the best way is   import yourfile   and after modifying yourfile py  reload yourfile       or   import imp   imp reload yourfile  in python3   but this will make the function and classes looks like that  yourfile function1  yourfile class1       If you cannot accept those   the finally solution is   reload yourfile  from yourfile import

[python] How to execute a file within the python interpreter?

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