feat: pyspark group by n_unique and no aggregation
#1819
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FBruzzesi
commented
Jan 17, 2025
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| from narwhals._spark_like.dataframe import SparkLikeLazyFrame | ||
| from narwhals._spark_like.typing import IntoSparkLikeExpr | ||
| from narwhals.typing import CompliantExpr | ||
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| POLARS_TO_PYSPARK_AGGREGATIONS = {"len": "count"} |
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