[PATCH] Change method of loading .py files in Python tests

[Joel Brobecker]

> > With my debug build of Python (--with-pydebug), many tests fails because
> > of the same issue.  Python scripts are loaded by the tests using this
> > pattern:
> > 
> >   (gdb) python exec (open ('file.py').read ())
> > 
> > This causes Python to output this warning:
> > 
> >   __main__:1: ResourceWarning: unclosed file <_io.TextIOWrapper name='file.py' mode='r' encoding='ANSI_X3.4-1968'>
> > 
> > and the test to fail because of that extra output.  Instead of using the
> > open + read + exec trick which leaks the file and causes the warning,
> > why not just source the files?
> > 
> >   (gdb) source file.py
> 
> Maybe historical.  ISTR that "source" didn't read in python
> files automatically originally.  But I may easily be misremembering.

It is historical. At the beginning the idea of being able to source
a Python script using "source" generated some disagreements, and we
had to discuss a number of options before we could settle on a design
that we could agree on.

-- 
Joel