How can I make DataFrame and then more rows one at a time? import polars as pl df_polars = pl.DataFrame({ 'abc': [], 'def': [], 'ghi': [] }) value_to_set = 10.0 df_polars = df_polars.extend([ pl.lit(None).alias('abc'), pl.lit(value_to_set).alias('def'), pl.lit(None).alias('ghi') ]) print(df_polars) It only works for one field at a time. What is a more efficient approach to add several rows to my data-frame? Continue reading...