gi.py 文件源码

def _gst_available():
    """Determine whether Gstreamer and the Python GObject bindings are
    installed.
    """
    try:
        import gi
    except ImportError:
        return False

    try:
        gi.require_version('Gst', '1.0')
    except (ValueError, AttributeError):
        return False

    try:
        from gi.repository import Gst  # noqa
    except ImportError:
        return False

    return True