I'd like to add new empty columns (elements of mylist) to an existing dataframe.
This code does it:
import polars as pl
df = pl.DataFrame({'a': [1,2,3]})
mylist = [f'col{i}' for i in range(1,4)]
data = [[''] for i in range(1,len(mylist)+1)]
df.join(pl.DataFrame(data=data,schema=mylist),
how='cross')
但有没有更两极的方法来做到这一点呢?使用.with_Columns()或pl.any()的内容?这样我就不必创建新的数据帧并加入它了?