How do I exec a user script and note errors?

[Fredrik Lundh]

Robert Ferrell wrote:

> I want to read in (and execute) a user python file.  I know I can do
> that with execfile().  However, I want to catch some errors that the
> user might have made.  If I read the file line at a time, and exec
> each line, I can use try:/except:.  However, that doesn't work if the
> user has function defitions, or other multi-line code blocks in the
> file.

how about:

    try:
        execfile(filename)
    except:
        ...

if you really want to process the file a line at a time, you can use
the InteractiveConsole module from the code module:

from code import InteractiveConsole

program = [
    "print 'spam'\n",
    "for i in range(10):\n",
    "    print 'bacon'\n",
    "print 'egg'\n",
]

console = InteractiveConsole()

for line in program:
    print "--- push", repr(line)
    console.push(line)
print "--- done"

</F>