I don't know the name of this idiom, but the following is valid Python:

import pandas as pd

my_df = (

    pd.Dataframe(<fetch_data>)

    .join(<...>)

    .query(<...>)

    .sort_values(<...>)

)

I also use plotly like so:

my_plot = (

    px.line(<...>)

    .update_xaxes(<...>)

    .update_layout(<...)

)

Not exactly function chaining, but I guess it has a similar effect.

I'm happy with Python's syntax nowadays and much prefer seeing improvements on library / environment related things.