class polars.Series( name: str | ArrayLike | None = None, values: ArrayLike | None = None, dtype: PolarsDataType | None = None, *, strict: bool = True, nan_to_null: bool = False, ) [source] A …

2024年8月16日 · 在 Polars 中， Series 是一个非常重要的 数据结构，它类似于 NumPy 的 数组 或 Pandas 的 Series。 Series 代表一维的数据，可以包含各种数据类型，如整数、浮点数、字符 …

2024年8月12日 · 通过将这些作为Python dict传递给pl.DataFrame来创建一个DataFrame。 在“选择列和转换DataFrame”部分中，我们将看到如何从列表中向DataFrame添加列。 我们可以使 …

polars.DataFrame.to_series # DataFrame.to_series(index: int = 0) → Series [source] # Select column as Series at index location. Parameters: index Location of selection.

Series can be create from different data structures. Below we’ll show a few ways we can create a Series object.

Returns a Series with a single zeroed entry if self is an empty numeric series. If the DataType is one of {Int8, UInt8, Int16, UInt16} the Series is first cast to Int64 to prevent overflow issues.

Compare Series and ChunkedArray ’s and get a boolean mask that can be used to filter rows. Used to convert a ChunkedArray, &dyn SeriesTrait and Series into a Series. Type agnostic …

这些函数返回一个或多个 Series. 在 select context 里, 可以用 col 构建一个列选择表达式, 接着对其进行操作. polars DataFrame 实现了 Index trait, 所以你也可以通过以下方式获取列, 请注意, …

Series The columnar data type for a DataFrame. Most of the available functions are defined in the SeriesTrait trait. The Series struct consists of typed ChunkedArray ’s. To quickly cast a Series …

2023年2月21日 · There are basically 2 ways to do this. Use .to_series () on .select () method on your polars dataframe. Use .to_series () alone. And you specify the index of your column to …