##
3.12.1 Traceback Example

This simple example implements a basic read-eval-print loop, similar to (but less useful than) the standard Python interactive interpreter loop. For a more complete implementation of the interpreter loop, refer to the `code` module.

    import sys, traceback

    def run_user_code(envdir):
        source = raw_input(">>> ")
        try:
            exec source in envdir
        except:
            print "Exception in user code:"
            print '-'*60
            traceback.print_exc(file=sys.stdout)
            print '-'*60

    envdir = {}
    while 1:
        run_user_code(envdir)