Class Grammar

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object --+
         |
        Grammar

A context-free grammar. A Grammar consists of a start state and a set of productions. The set of terminals and nonterminals is implicitly specified by the productions.

If you need efficient key-based access to productions, you can use a subclass to implement it.

Instance Methods

[hide private]

__init__(self, start, productions)
Create a new context-free grammar, from the given start state and set of Productions. source code

start(self)

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productions(self, lhs=None, rhs=None)

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__repr__(self)
repr(x)

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__str__(self)
str(x)

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Inherited from object: __delattr__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __setattr__

Properties

[hide private]

Inherited from object: __class__

Method Details

[hide private]

init(self, start, productions)
(Constructor)

source code

Create a new context-free grammar, from the given start state and set of Productions.

Parameters:

start (Nonterminal) - The start symbol
productions (list of Production) - The list of productions that defines the grammar

Overrides: object.__init__

repr(self)
(Representation operator)

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repr(x)

Overrides: object.__repr__: (inherited documentation)

str(self)
(Informal representation operator)

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str(x)

Overrides: object.__str__: (inherited documentation)

Class Grammar

__init__(self, start, productions) (Constructor)

__repr__(self) (Representation operator)

__str__(self) (Informal representation operator)

init(self, start, productions)
(Constructor)

repr(self)
(Representation operator)

str(self)
(Informal representation operator)