Calculating weekly rental totals

Beyond filtering, you often need to aggregate data by time periods. To spot trends across July and compare week-over-week demand, calculate weekly rental totals.

polars is loaded as pl. The DataFrame bikes is available, sorted by time.

Deze oefening maakt deel uit van de cursus

Data Transformation with Polars

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Oefeninstructies

Group the data by week using group_by_dynamic().
Calculate the sum of rentals and name it total_rentals.

Praktische interactieve oefening

Probeer deze oefening eens door deze voorbeeldcode in te vullen.

# Group the data by week
bikes.____("time", every="____").agg(
  
    # Calculate the sum of rentals
    pl.col("rentals").____().alias("____")
)

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