titus.util.DynamicScope¶

class titus.util.DynamicScope(parent)[source]¶

Bases: object

Keep track of a variable scope dynamically, for the sake of simulating lexical scope in a PFA document (ironically).

__init__(parent)¶

Parameters:	parent (titus.util.DynamicScope or None) – scope to use for resolving variables not found in this scope

get(symbol)¶

Look up a variable, returning its value.

Parameters:	symbol (string) – variable name to look up
Return type:	anything
Returns:	variable value

let(nameExpr)¶

Create a new variable.

Parameters:	nameExpr (dict from new variable names to their initial values) – variables and values to assign

set(nameExpr)¶

Reassign variables.

Parameters:	nameExpr (dict from new variable names to their new values) – variables and values to assign