强大的数据可视化 Python 库。支持多种数据展示方式、接口简单、效果炫酷，示例代码和效果如下： ```python import altair as alt from vega_datasets import data source = data.cars() brush = alt.selection(type='interval') points = alt.Chart(source).mark_point().encode( x='Horsepower', y='Miles_per_Gallon', color=alt.condition(brush, 'Origin', alt.value('lightgray')) ).add_selection( brush ) bars = alt.Chart(source).mark_bar().encode( y='Origin', color='Origin', x='count(Origin)' ).transform_filter( brush ) points & bars ```