Class JSONEncoder

simplejson/encoder.py:125–396

Extensible JSON encoder for Python data structures. Supports the following objects and types by default: +-------------------+---------------+ | Python | JSON | +===================+===============+ | dict, namedtuple | object |

    c_encode_basestring or py_encode_basestring)

class JSONEncoder(object):
    """Extensible JSON <http://json.org> encoder for Python data structures.

    Supports the following objects and types by default:

    +-------------------+---------------+
    | Python            | JSON          |
    +===================+===============+
    | dict, namedtuple  | object        |
    +-------------------+---------------+
    | list, tuple       | array         |
    +-------------------+---------------+
    | str, unicode      | string        |
    +-------------------+---------------+
    | int, long, float  | number        |
    +-------------------+---------------+
    | True              | true          |
    +-------------------+---------------+
    | False             | false         |
    +-------------------+---------------+
    | None              | null          |
    +-------------------+---------------+

    To extend this to recognize other objects, subclass and implement a
    ``.default()`` method with another method that returns a serializable
    object for ``o`` if possible, otherwise it should call the superclass
    implementation (to raise ``TypeError``).

    """
    item_separator = ', '
    key_separator = ': '

    def __init__(self, skipkeys=False, ensure_ascii=True,
                 check_circular=True, allow_nan=False, sort_keys=False,
                 indent=None, separators=None, encoding='utf-8', default=None,
                 use_decimal=True, namedtuple_as_object=True,
                 tuple_as_array=True, bigint_as_string=False,
                 item_sort_key=None, for_json=False, ignore_nan=False,
                 int_as_string_bitcount=None, iterable_as_array=False):
        """Constructor for JSONEncoder, with sensible defaults.

        If skipkeys is false, then it is a TypeError to attempt
        encoding of keys that are not str, int, long, float or None.  If
        skipkeys is True, such items are simply skipped.

        If ensure_ascii is true, the output is guaranteed to be str
        objects with all incoming unicode characters escaped.  If
        ensure_ascii is false, the output will be unicode object.

        If check_circular is true, then lists, dicts, and custom encoded
        objects will be checked for circular references during encoding to
        prevent an infinite recursion (which would cause an OverflowError).
        Otherwise, no such check takes place.

        If allow_nan is true (default: False), then out of range float
        values (nan, inf, -inf) will be serialized to
        their JavaScript equivalents (NaN, Infinity, -Infinity)
        instead of raising a ValueError. See