Rule Formatting#

Functions#

simplify_rule#

iguanas.rule_formatting.simplify_rule(rule: str) → str[source]#

Simplify a rule by removing redundant conditions on the same column.

When multiple conditions exist on the same column, keeps only the most restrictive:

  • For lower bounds (>, >=): keeps the highest threshold, preferring > over >= when equal

  • For upper bounds (<, <=): keeps the lowest threshold, preferring < over <= when equal

Parameters:

rule (str) – Rule string with conditions like (X[“col”] > val) & (X[“col”] >= val).

Returns:

Simplified rule string with redundant conditions removed. Column order is preserved based on first appearance.

Return type:

str

Examples

>>> simplify_rule('(X["amount"] >= 100.0) & (X["amount"] > 100.0)')
'(X["amount"] > 100.0)'

>>> simplify_rule('(X["amount"] < 100.0) & (X["amount"] <= 100.0)')
'(X["amount"] < 100.0)'

>>> simplify_rule('(X["a"] >= 50) & (X["b"] < 10) & (X["a"] > 100)')
'(X["a"] > 100) & (X["b"] < 10)'