Module expr 

Expression system — predicates for filter, computed columns for mutate.

DExpr is a simple expression tree: column references, literals, and binary operations. It evaluates against a DataFrame row-by-row or column-by-column (the columnar fast path).

Enums

BinOp

Binary operators supported in expressions.

DExpr

Data expression — used in filter predicates and mutate computations.

ExprValue

Result of evaluating a DExpr at a single row.

Functions

binop

Create a binary operation expression.

col

Create a column reference expression.

eval_expr_row

Evaluate a DExpr at a single row of a DataFrame.

try_eval_predicate_columnar

Try to evaluate a predicate in columnar mode (fast path).