ipython %run testscript_in_pythonpath.py returns "no file found" error
Question: I would like to use the %run magic command to run a script in a directory
which is in the pythonpath variable. The script reads some files in the
working directory. However, when I try to run the script using the command:
%run "testscript_in_pythonpath.py ", it returns an error. I thought files in
pythonpath would be accessible to the interpreter, no ??


Answer: (Reposting as an answer)

`$PYTHONPATH` is what Python uses to look up modules to import, not scripts to
run.

To run a file from `$PYTHONPATH`, you can do `import
testscript_in_pythonpath`. Or, in IPython:

    
    
    %run -m testscript_in_pythonpath
    

The difference is that if the file has an `if __name__ == '__main__':`
section, `%run` will trigger that.

From a system shell, you can do the same thing as:

    
    
    python -m testscript_in_pythonpath
    

