shape: (4, 3)
| year | rating | minutes |
|---|---|---|
| i64 | f64 | i64 |
| 2011 | 7.1 | 107 |
| 1999 | 6.4 | 101 |
| 2000 | 7.0 | 120 |
| 2017 | 6.8 | 133 |
Insert a column into a polars dataframe
insert_column
100DaysOfPolars
Polars allows you to insert a column into a dataframe at any position you want. Below is a dataframe showing the ratings of some unknown movies.
ratings_df
movie_title_column
shape: (4,)
| movie |
|---|
| str |
| "Margin Call" |
| "Rogue Trader" |
| "Boiler Room" |
| "The Wizard of Lies" |
Insert column into dataframe
To insert another column into the dataframe above, make sure the column type is series, not dataframe. Here’s how you can insert a new column as the first column in the dataframe:
(ratings_df
.insert_column(0, movie_title_column)
)
shape: (4, 4)
| movie | year | rating | minutes |
|---|---|---|---|
| str | i64 | f64 | i64 |
| "Margin Call" | 2011 | 7.1 | 107 |
| "Rogue Trader" | 1999 | 6.4 | 101 |
| "Boiler Room" | 2000 | 7.0 | 120 |
| "The Wizard of Lies" | 2017 | 6.8 | 133 |
Check out my Polars course to learn more.