list_usingPythonList.py 文件源码

def groupby(self, keys, contiguous=False):
        try:
            keys = listwrap(keys)
            get_key = jx_expression_to_function(keys)
            if not contiguous:
                data = sorted(self.data, key=get_key)

            def _output():
                for g, v in itertools.groupby(data, get_key):
                    group = Data()
                    for k, gg in zip(keys, g):
                        group[k] = gg
                    yield (group, wrap(list(v)))

            return _output()
        except Exception as e:
            Log.error("Problem grouping", e)