shape: (4, 2)
| Invention | Year |
|---|---|
| str | i64 |
| "Airplane" | 1903 |
| "Sliced bread" | 1928 |
| "Microwave" | 1945 |
| "World Wide Web" | 1989 |
Divide with no remainder in polars
floordiv
100DaysOfPolars
In programming, division comes in two forms: with a remainder and without a remainder. In most programming languages, the symbol / represents division with a remainder, while // represents division without a remainder. Polars provides equivalent expressions for these operations, called truediv and floordiv, respectively.
Below is a dataframe showing the years of some of the greatest inventions of the last century.
Get decade from year
You can create a new column to show the decade in which each invention occurred by using the floordiv expression and multiplying the non-decimal value by 10, as shown below:
(df
.with_columns(Decade=pl.col('Year').floordiv(10)*10)
)
shape: (4, 3)
| Invention | Year | Decade |
|---|---|---|
| str | i64 | i64 |
| "Airplane" | 1903 | 1900 |
| "Sliced bread" | 1928 | 1920 |
| "Microwave" | 1945 | 1940 |
| "World Wide Web" | 1989 | 1980 |
Check out my Polars course to learn more cool Polars tricks.