util.py 文件源码

def load_class(uri, default="gunicorn.workers.sync.SyncWorker",
        section="gunicorn.workers"):
    if inspect.isclass(uri):
        return uri
    if uri.startswith("egg:"):
        # uses entry points
        entry_str = uri.split("egg:")[1]
        try:
            dist, name = entry_str.rsplit("#", 1)
        except ValueError:
            dist = entry_str
            name = default

        try:
            return pkg_resources.load_entry_point(dist, section, name)
        except:
            exc = traceback.format_exc()
            msg = "class uri %r invalid or not found: \n\n[%s]"
            raise RuntimeError(msg % (uri, exc))
    else:
        components = uri.split('.')
        if len(components) == 1:
            while True:
                if uri.startswith("#"):
                    uri = uri[1:]

                if uri in SUPPORTED_WORKERS:
                    components = SUPPORTED_WORKERS[uri].split(".")
                    break

                try:
                    return pkg_resources.load_entry_point("gunicorn",
                                section, uri)
                except:
                    exc = traceback.format_exc()
                    msg = "class uri %r invalid or not found: \n\n[%s]"
                    raise RuntimeError(msg % (uri, exc))

        klass = components.pop(-1)

        try:
            mod = import_module('.'.join(components))
        except:
            exc = traceback.format_exc()
            msg = "class uri %r invalid or not found: \n\n[%s]"
            raise RuntimeError(msg % (uri, exc))
        return getattr(mod, klass)