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# ``twisted`.`words`.`xish`.`xpath`.`BooleanValue``

class documentation

`class BooleanValue: (source)`

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Provide boolean XPath expression operators.

Method | `__init__` | Undocumented
Instance Variable | `lhs` | Left hand side expression of the operator.
Instance Variable | `op` | The operator. One of `'and'`, `'or'`.
Instance Variable | `rhs` | Right hand side expression of the operator.
Instance Variable | `value` | Reference to the method that will calculate the value of this expression given an element.
Method | `_booleanAnd` | Calculate boolean and of the given expressions given an element.
Method | `_booleanOr` | Calculate boolean or of the given expressions given an element.

def __init__(self, lhs, op, rhs): (source)

Undocumented

lhs = (source)

Left hand side expression of the operator.

op = (source)

The operator. One of `'and'`, `'or'`.

rhs = (source)

Right hand side expression of the operator.

value = (source)

Reference to the method that will calculate the value of this expression given an element.

def _booleanAnd(self, elem): (source)

Calculate boolean and of the given expressions given an element.

Parameters
elem | The element to calculate the value of the expression from.

def _booleanOr(self, elem): (source)

Calculate boolean or of the given expressions given an element.

Parameters
elem | The element to calculate the value of the expression from.