从基本计算到更复杂的操作,Polars 简化了数据探索和特征工程。meansum Polars 入门 拥抱极地是一件轻而易举的事。下面是一个快速指南: 安装:用于安装库。pip install polars 数据加载:Polars 支持从 CSV、Parquet 和 Arrow 文件等各种来源加载数据。 数据探索:Polars 提供数据检查方法,包括头部/尾部视图和基本统计摘...
Python tutorial on Polars, a fast DataFrame library for data manipulation and analysis with practical examples.
The text in parentheses beside each data type shows how these types are annotated in a DataFrame heading when Polars displays its results:Column NamePolars Data TypeDescription record_id Int64 (i64) Unique row identifier total Float64 (f64) Bill total tip Float64 (f64) Tip given gender ...
import polars as pl data = { 'Name': ['Alice', 'Bob', 'Charlie', 'David'], 'Age': [25, None, 22, 35] } df = pl.DataFrame(data) sorted_df = df.sort('Age', nulls_last=True) print(sorted_df) The sort('Age', nulls_last=True) sorts the DataFrame with null values placed...
You then see a tabular preview of the data that shows the column names and their data types. For instance, year has type float64, and building_type has type str. Polars supports a variety of data types that are primarily based on the implementation from Arrow. Polars DataFrames are equippe...
import polars as pl# Load data from a CSV filedf = pl.read_csv("cars.csv") # Replace "cars.csv" with your actual file path 进口:为了方便起见,我们首先导入库。polarspl 数据加载:该函数从路径指定的 CSV 文件中读取数据。请记住替换为 CSV 文件的实际位置。这将创建一个名为 Polars DataFrame 的...
alexmerced/spark35nb Docker镜像使这个过程变得更简单,因为它提供了一个预设环境,在这个环境中,你可以尝试多种流行的数据工具,包括PySpark、Pandas、DuckDB、Polars和DataFusion。 在这个博客里,我们将一步步教您如何搭建这个环境,并演示如何使用这些工具执行基本的数据处理,例如写入数据、加载数据以及执行查询和聚合操作...
首先是安装Polars GPU,如下代码即可: pip install polars[gpu] 测试数据集一千万行,将近一个GB。 首先使用Polars CPU对数据集进行读取、过滤、分组聚合等处理。 import polars as pl import time # 读取 CSV 文件 start = time.time() df_pl = pl.read_csv('test_data.csv') load_time_pl = time.time...
Polars data typesPythonR Boolean logical Int8, UInt8, Int16, UInt16, Int32 integer UInt32, UInt64 integer (if x <= 2_147_483_647) or numeric Int64 integer (if abs(x) <= 2_147_483_647) or bit64::integer64 Float32, Float64 numeric Date Date Datetime POSIXct Duration difftime(...
示例代码：importpolarsaspl# Creating a data framedf=pl.DataFrame({"A":[1,2,3,4,5],"B":[...