config.Expression

Module config :: Class Expression

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Type Expression

object --+
         |
        Expression

This internal class implements a value which is obtained by evaluating an expression.

Method Summary
	__init__(self, op, lhs, rhs) Initialize an instance.
	__repr__(self)
	__str__(self)
any	evaluate(self, container) Evaluate this instance in the context of a container.
Inherited from object
	__delattr__(...) x.__delattr__('name') <==> del x.name
	__getattribute__(...) x.__getattribute__('name') <==> x.name
	__hash__(x) Return hash(x)...
	__new__(T, S, ...) Return a new object with type S, a subtype of T...
	__reduce__(...) helper for pickle
	__reduce_ex__(...) helper for pickle
	__setattr__(...) x.__setattr__('name', value) <==> x.name = value

Method Details

Initialize an instance.

Parameters:: op - the operation expressed in the expression.
(type=PLUS, MINUS, STAR, SLASH, MOD); lhs - the left-hand-side operand of the expression.
(type=any Expression or primary value.); rhs - the right-hand-side operand of the expression.
(type=any Expression or primary value.)

Evaluate this instance in the context of a container.

Parameters:: container - The container to evaluate in from.
(type=Container)

Raises:: ConfigResolutionError - If evaluation fails.; ZeroDivideError - If division by zero occurs.; TypeError - If the operation is invalid, e.g. subtracting one string from another.