Chaining multiple conditions

You can also chain multiple conditions together. The product team wants to categorize products as "Large", "Medium", or "Small" based on their size for shipping optimization.

本练习是课程的一部分

Data Transformation with Polars

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练习说明

Check if the "size" column equals "100ml" and return "Large".
Check if the "size" column equals "50ml" and return "Medium".
Return "Small" for all other sizes and name the column "size_category".

交互式实操练习

通过完成这段示例代码来试试这个练习。

reviews.with_columns(
  	# Check if size is "100ml" and return "Large"
    pl.when(pl.col("____") == "____").then(pl.lit("____"))
  
    # Check if size is "50ml" and return "Medium"
    .____(pl.col("size") == "____").then(pl.lit("____"))
  
    # Return "Small" for other sizes
    .____(pl.lit("____"))
    .alias("size_category")
)

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