예제 #1
0
파일: frame.py 프로젝트: keiv-fly/polars
    def lazy(self) -> "pypolars.lazy.LazyFrame":
        """
        Start a lazy query from this point. This returns a `LazyFrame` object.

        Operations on a `LazyFrame` are not executed until this is requested by either calling:

        * `.fetch()` (run on a small number of rows)
        * `.collect()` (run on all data)
        * `.describe_plan()` (print unoptimized query plan)
        * `.describe_optimized_plan()` (print optimized query plan)
        * `.show_graph()` (show (un)optimized query plan) as graphiz graph.

        Lazy operations are advised because the allow for query optimization and more parallelization.
        """
        from pypolars.lazy import wrap_ldf

        return wrap_ldf(self._df.lazy())
예제 #2
0
    def lazy(self) -> "pypolars.lazy.LazyFrame":
        from pypolars.lazy import wrap_ldf

        return wrap_ldf(self._df.lazy())