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daft.functions.list_sum#

list_sum #

list_sum(list_expr: Expression) -> Expression

Sums each list. Empty lists and lists with all nulls yield null.

Parameters:

Name Type Description Default
list_expr List Expression

expression to sum elements of.

 required

Returns:

Name Type Description
Expression Expression

an expression with the type of the list values
Source code in daft/functions/list.py 
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def list_sum(list_expr: Expression) -> Expression:
    """Sums each list. Empty lists and lists with all nulls yield null.

    Args:
        list_expr (List Expression): expression to sum elements of.

    Returns:
        Expression: an expression with the type of the list values
    """
    return Expression._call_builtin_scalar_fn("list_sum", list_expr)