I have scrubbed the polars docs and cannot see an example of creating a column with a fixed value from a variable. Here is what works in pandas:
df['VERSION'] = version
Thx
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2 Answers
Use polars.lit
import polars as pl
version = 6
df = df.with_columns(pl.lit(version).alias('VERSION'))
3 Comments
Here's some documentation on the
lit expression: pola-rs.github.io/polars/py-polars/html/reference/api/…
rchitect-of-info
Thanks @cbilot for the quick response. Trying to migrate all of pandas code for extract, transform and load into database to polars.
abk
with_columns() is now the correct method, with_column will throw an error.How to add new column to Latest (2024) Polars DataFrame:
In this example we are adding a uuid column to dataframe
import uuid
import polars as pl
# Generate a UUID
uuid = str(uuid.uuid4())
# Add a new column with the generated UUID to the DataFrame
df = df.with_columns(uuid=pl.lit(uuid))
Doc:
