picalo.base.Expression.PicaloExpression

Package picalo :: Package base :: Module Expression :: Class PicaloExpression

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Class PicaloExpression

A class that compiles an expression. This is done so the expression and locals/globals are only compiled and determined one time rather than for each time the expression is run. It's for efficiency.

Method Summary
	`__init__(self, expression, *locals)` Constructor.
	`__eq__(self, other)`
	`__ne__(self, other)`
	`__repr__(self)`
	`__str__(self)` Returns a string representation of this expression
	`evaluate(self, locals, expression_backtrack)` Runs the expression given any additional locals and globals

Method Details

init(self, expression, locals)
(Constructor)*

Constructor. The initial_locals and initial_globals dicts override any local or global variables

str(self)
(Informal representation operator)

Returns a string representation of this expression

evaluate(self, locals, expression_backtrack=[])

Runs the expression given any additional locals and globals

locals => A list of dictionaries containing mappings that override the values in locals expression_backtrack => A list of all the expression id's we've run so far, to catch circular logic.

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Class PicaloExpression

__init__(self, expression, *locals) (Constructor)

__str__(self) (Informal representation operator)

evaluate(self, locals, expression_backtrack=[])

init(self, expression, locals)
(Constructor)*

str(self)
(Informal representation operator)