async.py 文件源码

def safe_call(function, *args, **kwargs):
    """
    If we're not in the main process, sets the default signal handler
    (`signal.SIG_DFL`) for the ``SIGINT`` signal before calling *function*
    using the given *args* and *kwargs*.  Otherwise *function* will just be
    called and returned normally.

    The point being to prevent loads of unnecessary tracebacks from being
    printed to stdout when the user executes a :kbd:`Ctrl-C` on a running
    gateone.py process.

    ..  note::

        This function is only meant to be used to wrap calls made inside of
        `MultiprocessRunner` instances.
    """
    if os.getpid() != PID:
        signal.signal(signal.SIGINT, signal.SIG_DFL)
    return function(*args, **kwargs)