formatron.formats.json Namespace Reference

The module defines the JsonExtractor class, which is used to extract data from a string in JSON format. More...

Classes
class	JsonExtractor
	An extractor that loads json data to an object from a string. More...

Functions
None	register_generate_nonterminal_def (typing.Callable[[typing.Type, str], typing.Optional[typing.Tuple[str, typing.List[typing.Tuple[typing.Type, str]]]]] generate_nonterminal_def)
	Register a callable to generate nonterminal definition from a type.
	_register_all_predefined_types ()
str	_generate_kbnf_grammar (schemas.schema.Schema|collections.abc.Sequence schema, str start_nonterminal)
	Generate a KBNF grammar string from a schema for JSON format.

Variables
str	SPACE_NONTERMINAL = "[ \t\n\r]*"
str	GRAMMAR_HEADER
list	_type_to_nonterminals

Detailed Description

The module defines the JsonExtractor class, which is used to extract data from a string in JSON format.

Function Documentation

_generate_kbnf_grammar()

str formatron.formats.json._generate_kbnf_grammar ( schemas.schema.Schema|collections.abc.Sequence schema, str start_nonterminal )

protected

Generate a KBNF grammar string from a schema for JSON format.

Parameters

schema	The schema to generate a grammar for.
start_nonterminal	The start nonterminal of the grammar. Default is "start".

Returns

The generated KBNF grammar string.

Definition at line 392 of file json.py.

_register_all_predefined_types()

formatron.formats.json._register_all_predefined_types ( )

protected

Definition at line 60 of file json.py.

register_generate_nonterminal_def()

None formatron.formats.json.register_generate_nonterminal_def

(

typing.Callable[ [typing.Type, str], typing.Optional[typing.Tuple[str, typing.List[typing.Tuple[typing.Type, str]]]]]

generate_nonterminal_def

)

Register a callable to generate nonterminal definition from a type.

The callable returns (nonterminal_definition, [(sub_type, sub_nonterminal), ...]) if the type is supported by this callable, otherwise None. [(sub_type, sub_nonterminal), ...] are the types and nonterminals used in nonterminal_definition that may need to be generated in the grammar too.

Parameters

generate_nonterminal_def

A callable to generate nonterminal definition from a type.

Definition at line 52 of file json.py.

Variable Documentation

_type_to_nonterminals

list formatron.formats.json._type_to_nonterminals

protected

Definition at line 38 of file json.py.

GRAMMAR_HEADER

str formatron.formats.json.GRAMMAR_HEADER

Initial value:

=  rf"""integer ::= #"-?(0|[1-9][0-9]*)";
number ::= #"-?(0|[1-9][0-9]*)(\\.[0-9]+)?([eE][+-]?[0-9]+)?";
string ::= #'"([^\\\\"\u0000-\u001f]|\\\\["\\\\bfnrt/]|\\\\u[0-9A-Fa-f]{{4}})*"';
boolean ::= "true"|"false";
null ::= "null";
array ::= array_begin (json_value (comma json_value)*)? array_end;
object ::= object_begin (string colon json_value (comma string colon json_value)*)? object_end;
json_value ::= number|string|boolean|null|array|object;
comma ::= #"{SPACE_NONTERMINAL},{SPACE_NONTERMINAL}";
colon ::= #"{SPACE_NONTERMINAL}:{SPACE_NONTERMINAL}";
object_begin ::= #"\\{{{SPACE_NONTERMINAL}";
object_end ::= #"{SPACE_NONTERMINAL}\\}}";
array_begin ::= #"\\[{SPACE_NONTERMINAL}";
array_end ::= #"{SPACE_NONTERMINAL}\\]";
"""

Definition at line 19 of file json.py.

SPACE_NONTERMINAL

str formatron.formats.json.SPACE_NONTERMINAL = "[ \t\n\r]*"

Definition at line 17 of file json.py.