diff options
Diffstat (limited to 'modules/language/python/module/#json.py#')
| -rw-r--r-- | modules/language/python/module/#json.py# | 369 |
1 files changed, 0 insertions, 369 deletions
diff --git a/modules/language/python/module/#json.py# b/modules/language/python/module/#json.py# deleted file mode 100644 index 93a7b1c..0000000 --- a/modules/language/python/module/#json.py# +++ /dev/null @@ -1,369 +0,0 @@ -module(json) - -r"""JSON (JavaScript Object Notation) <http://json.org> is a subset of -JavaScript syntax (ECMA-262 3rd edition) used as a lightweight data -interchange format. - -:mod:`json` exposes an API familiar to users of the standard library -:mod:`marshal` and :mod:`pickle` modules. It is derived from a -version of the externally maintained simplejson library. - -Encoding basic Python object hierarchies:: - - >>> import json - >>> json.dumps(['foo', {'bar': ('baz', None, 1.0, 2)}]) - '["foo", {"bar": ["baz", null, 1.0, 2]}]' - >>> print(json.dumps("\"foo\bar")) - "\"foo\bar" - >>> print(json.dumps('\u1234')) - "\u1234" - >>> print(json.dumps('\\')) - "\\" - >>> print(json.dumps({"c": 0, "b": 0, "a": 0}, sort_keys=True)) - {"a": 0, "b": 0, "c": 0} - >>> from io import StringIO - >>> io = StringIO() - >>> json.dump(['streaming API'], io) - >>> io.getvalue() - '["streaming API"]' - -Compact encoding:: - - >>> import json - >>> from collections import OrderedDict - >>> mydict = OrderedDict([('4', 5), ('6', 7)]) - >>> json.dumps([1,2,3,mydict], separators=(',', ':')) - '[1,2,3,{"4":5,"6":7}]' - -Pretty printing:: - - >>> import json - >>> print(json.dumps({'4': 5, '6': 7}, sort_keys=True, indent=4)) - { - "4": 5, - "6": 7 - } - -Decoding JSON:: - - >>> import json - >>> obj = ['foo', {'bar': ['baz', None, 1.0, 2]}] - >>> json.loads('["foo", {"bar":["baz", null, 1.0, 2]}]') == obj - True - >>> json.loads('"\\"foo\\bar"') == '"foo\x08ar' - True - >>> from io import StringIO - >>> io = StringIO('["streaming API"]') - >>> json.load(io)[0] == 'streaming API' - True - -Specializing JSON object decoding:: - - >>> import json - >>> def as_complex(dct): - ... if '__complex__' in dct: - ... return complex(dct['real'], dct['imag']) - ... return dct - ... - >>> json.loads('{"__complex__": true, "real": 1, "imag": 2}', - ... object_hook=as_complex) - (1+2j) - >>> from decimal import Decimal - >>> json.loads('1.1', parse_float=Decimal) == Decimal('1.1') - True - -Specializing JSON object encoding:: - - >>> import json - >>> def encode_complex(obj): - ... if isinstance(obj, complex): - ... return [obj.real, obj.imag] - ... raise TypeError(repr(obj) + " is not JSON serializable") - ... - >>> json.dumps(2 + 1j, default=encode_complex) - '[2.0, 1.0]' - >>> json.JSONEncoder(default=encode_complex).encode(2 + 1j) - '[2.0, 1.0]' - >>> ''.join(json.JSONEncoder(default=encode_complex).iterencode(2 + 1j)) - '[2.0, 1.0]' - - -Using json.tool from the shell to validate and pretty-print:: - - $ echo '{"json":"obj"}' | python -m json.tool - { - "json": "obj" - } - $ echo '{ 1.2:3.4}' | python -m json.tool - Expecting property name enclosed in double quotes: line 1 column 3 (char 2) -""" -__version__ = '2.0.9' -__all__ = [ - 'dump', 'dumps', 'load', 'loads', - 'JSONDecoder', 'JSONDecodeError', 'JSONEncoder', -] - -__author__ = 'Bob Ippolito <bob@redivi.com>' - -from json.decoder import JSONDecoder, JSONDecodeError -from json.encoder import JSONEncoder -import codecs - -_default_encoder = JSONEncoder( - skipkeys=False, - ensure_ascii=True, - check_circular=True, - allow_nan=True, - indent=None, - separators=None, - default=None, -) - -def dump(obj, fp, *, skipkeys=False, ensure_ascii=True, check_circular=True, - allow_nan=True, cls=None, indent=None, separators=None, - default=None, sort_keys=False, **kw): - """Serialize ``obj`` as a JSON formatted stream to ``fp`` (a - ``.write()``-supporting file-like object). - - If ``skipkeys`` is true then ``dict`` keys that are not basic types - (``str``, ``int``, ``float``, ``bool``, ``None``) will be skipped - instead of raising a ``TypeError``. - - If ``ensure_ascii`` is false, then the strings written to ``fp`` can - contain non-ASCII characters if they appear in strings contained in - ``obj``. Otherwise, all such characters are escaped in JSON strings. - - If ``check_circular`` is false, then the circular reference check - for container types will be skipped and a circular reference will - result in an ``OverflowError`` (or worse). - - If ``allow_nan`` is false, then it will be a ``ValueError`` to - serialize out of range ``float`` values (``nan``, ``inf``, ``-inf``) - in strict compliance of the JSON specification, instead of using the - JavaScript equivalents (``NaN``, ``Infinity``, ``-Infinity``). - - If ``indent`` is a non-negative integer, then JSON array elements and - object members will be pretty-printed with that indent level. An indent - level of 0 will only insert newlines. ``None`` is the most compact - representation. - - If specified, ``separators`` should be an ``(item_separator, key_separator)`` - tuple. The default is ``(', ', ': ')`` if *indent* is ``None`` and - ``(',', ': ')`` otherwise. To get the most compact JSON representation, - you should specify ``(',', ':')`` to eliminate whitespace. - - ``default(obj)`` is a function that should return a serializable version - of obj or raise TypeError. The default simply raises TypeError. - - If *sort_keys* is true (default: ``False``), then the output of - dictionaries will be sorted by key. - - To use a custom ``JSONEncoder`` subclass (e.g. one that overrides the - ``.default()`` method to serialize additional types), specify it with - the ``cls`` kwarg; otherwise ``JSONEncoder`` is used. - - """ - # cached encoder - if (not skipkeys and ensure_ascii and - check_circular and allow_nan and - cls is None and indent is None and separators is None and - default is None and not sort_keys and not kw): - iterable = _default_encoder.iterencode(obj) - else: - if cls is None: - cls = JSONEncoder - iterable = cls(skipkeys=skipkeys, ensure_ascii=ensure_ascii, - check_circular=check_circular, allow_nan=allow_nan, indent=indent, - separators=separators, - default=default, sort_keys=sort_keys, **kw).iterencode(obj) - # could accelerate with writelines in some versions of Python, at - # a debuggability cost - for chunk in iterable: - fp.write(chunk) - - -def dumps(obj, *, skipkeys=False, ensure_ascii=True, check_circular=True, - allow_nan=True, cls=None, indent=None, separators=None, - default=None, sort_keys=False, **kw): - """Serialize ``obj`` to a JSON formatted ``str``. - - If ``skipkeys`` is true then ``dict`` keys that are not basic types - (``str``, ``int``, ``float``, ``bool``, ``None``) will be skipped - instead of raising a ``TypeError``. - - If ``ensure_ascii`` is false, then the return value can contain non-ASCII - characters if they appear in strings contained in ``obj``. Otherwise, all - such characters are escaped in JSON strings. - - If ``check_circular`` is false, then the circular reference check - for container types will be skipped and a circular reference will - result in an ``OverflowError`` (or worse). - - If ``allow_nan`` is false, then it will be a ``ValueError`` to - serialize out of range ``float`` values (``nan``, ``inf``, ``-inf``) in - strict compliance of the JSON specification, instead of using the - JavaScript equivalents (``NaN``, ``Infinity``, ``-Infinity``). - - If ``indent`` is a non-negative integer, then JSON array elements and - object members will be pretty-printed with that indent level. An indent - level of 0 will only insert newlines. ``None`` is the most compact - representation. - - If specified, ``separators`` should be an ``(item_separator, key_separator)`` - tuple. The default is ``(', ', ': ')`` if *indent* is ``None`` and - ``(',', ': ')`` otherwise. To get the most compact JSON representation, - you should specify ``(',', ':')`` to eliminate whitespace. - - ``default(obj)`` is a function that should return a serializable version - of obj or raise TypeError. The default simply raises TypeError. - - If *sort_keys* is true (default: ``False``), then the output of - dictionaries will be sorted by key. - - To use a custom ``JSONEncoder`` subclass (e.g. one that overrides the - ``.default()`` method to serialize additional types), specify it with - the ``cls`` kwarg; otherwise ``JSONEncoder`` is used. - - """ - # cached encoder - if (not skipkeys and ensure_ascii and - check_circular and allow_nan and - cls is None and indent is None and separators is None and - default is None and not sort_keys and not kw): - return _default_encoder.encode(obj) - if cls is None: - cls = JSONEncoder - return cls( - skipkeys=skipkeys, ensure_ascii=ensure_ascii, - check_circular=check_circular, allow_nan=allow_nan, indent=indent, - separators=separators, default=default, sort_keys=sort_keys, - **kw).encode(obj) - - -_default_decoder = JSONDecoder(object_hook=None, object_pairs_hook=None) - - -def detect_encoding(b): - bstartswith = b.startswith - if bstartswith((codecs.BOM_UTF32_BE, codecs.BOM_UTF32_LE)): - return 'utf-32' - if bstartswith((codecs.BOM_UTF16_BE, codecs.BOM_UTF16_LE)): - return 'utf-16' - if bstartswith(codecs.BOM_UTF8): - return 'utf-8-sig' - - if len(b) >= 4: - if not b[0]: - # 00 00 -- -- - utf-32-be - # 00 XX -- -- - utf-16-be - return 'utf-16-be' if b[1] else 'utf-32-be' - if not b[1]: - # XX 00 00 00 - utf-32-le - # XX 00 00 XX - utf-16-le - # XX 00 XX -- - utf-16-le - return 'utf-16-le' if b[2] or b[3] else 'utf-32-le' - elif len(b) == 2: - if not b[0]: - # 00 XX - utf-16-be - return 'utf-16-be' - if not b[1]: - # XX 00 - utf-16-le - return 'utf-16-le' - # default - return 'utf-8' - - -def load(fp, *, cls=None, object_hook=None, parse_float=None, - parse_int=None, parse_constant=None, object_pairs_hook=None, **kw): - """Deserialize ``fp`` (a ``.read()``-supporting file-like object containing - a JSON document) to a Python object. - - ``object_hook`` is an optional function that will be called with the - result of any object literal decode (a ``dict``). The return value of - ``object_hook`` will be used instead of the ``dict``. This feature - can be used to implement custom decoders (e.g. JSON-RPC class hinting). - - ``object_pairs_hook`` is an optional function that will be called with the - result of any object literal decoded with an ordered list of pairs. The - return value of ``object_pairs_hook`` will be used instead of the ``dict``. - This feature can be used to implement custom decoders that rely on the - order that the key and value pairs are decoded (for example, - collections.OrderedDict will remember the order of insertion). If - ``object_hook`` is also defined, the ``object_pairs_hook`` takes priority. - - To use a custom ``JSONDecoder`` subclass, specify it with the ``cls`` - kwarg; otherwise ``JSONDecoder`` is used. - - """ - return loads(fp.read(), - cls=cls, object_hook=object_hook, - parse_float=parse_float, parse_int=parse_int, - parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw) - - -def loads(s, *, encoding=None, cls=None, object_hook=None, parse_float=None, - parse_int=None, parse_constant=None, object_pairs_hook=None, **kw): - """Deserialize ``s`` (a ``str``, ``bytes`` or ``bytearray`` instance - containing a JSON document) to a Python object. - - ``object_hook`` is an optional function that will be called with the - result of any object literal decode (a ``dict``). The return value of - ``object_hook`` will be used instead of the ``dict``. This feature - can be used to implement custom decoders (e.g. JSON-RPC class hinting). - - ``object_pairs_hook`` is an optional function that will be called with the - result of any object literal decoded with an ordered list of pairs. The - return value of ``object_pairs_hook`` will be used instead of the ``dict``. - This feature can be used to implement custom decoders that rely on the - order that the key and value pairs are decoded (for example, - collections.OrderedDict will remember the order of insertion). If - ``object_hook`` is also defined, the ``object_pairs_hook`` takes priority. - - ``parse_float``, if specified, will be called with the string - of every JSON float to be decoded. By default this is equivalent to - float(num_str). This can be used to use another datatype or parser - for JSON floats (e.g. decimal.Decimal). - - ``parse_int``, if specified, will be called with the string - of every JSON int to be decoded. By default this is equivalent to - int(num_str). This can be used to use another datatype or parser - for JSON integers (e.g. float). - - ``parse_constant``, if specified, will be called with one of the - following strings: -Infinity, Infinity, NaN. - This can be used to raise an exception if invalid JSON numbers - are encountered. - - To use a custom ``JSONDecoder`` subclass, specify it with the ``cls`` - kwarg; otherwise ``JSONDecoder`` is used. - - The ``encoding`` argument is ignored and deprecated. - - """ - if isinstance(s, str): - if s.startswith('\ufeff'): - raise JSONDecodeError("Unexpected UTF-8 BOM (decode using utf-8-sig)", - s, 0) - else: - if not isinstance(s, (bytes, bytearray)): - raise TypeError('the JSON object must be str, bytes or bytearray, ' - 'not {!r}'.format(s.__class__.__name__)) - s = s.decode(detect_encoding(s), 'surrogatepass') - - if (cls is None and object_hook is None and - parse_int is None and parse_float is None and - parse_constant is None and object_pairs_hook is None and not kw): - return _default_decoder.decode(s) - if cls is None: - cls = JSONDecoder - if object_hook is not None: - kw['object_hook'] = object_hook - if object_pairs_hook is not None: - kw['object_pairs_hook'] = object_pairs_hook - if parse_float is not None: - kw['parse_float'] = parse_float - if parse_int is not None: - kw['parse_int'] = parse_int - if parse_constant is not None: - kw['parse_constant'] = parse_constant - return cls(**kw).decode(s) |