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daft.functions.count_distinct#

count_distinct #

count_distinct(expr: Expression) -> Expression

Counts the number of distinct values in the expression.

Source code in daft/functions/agg.py 
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def count_distinct(expr: Expression) -> Expression:
    """Counts the number of distinct values in the expression."""
    return Expression._from_pyexpr(expr._expr.count_distinct())