魔改 json 导出为 lua

lua.py

"""Implementation of JSONEncoder
"""
import re

try:
    from _json import encode_basestring_ascii as c_encode_basestring_ascii
except ImportError:
    c_encode_basestring_ascii = None
try:
    from _json import make_encoder as c_make_encoder
except ImportError:
    c_make_encoder = None

ESCAPE = re.compile(r'[\x00-\x1f\\"\b\f\n\r\t]')
ESCAPE_ASCII = re.compile(r'([\\"]|[^\ -~])')
HAS_UTF8 = re.compile(r'[\x80-\xff]')
ESCAPE_DCT = {
    '\\': '\\\\',
    '"': '\\"',
    '\b': '\\b',
    '\f': '\\f',
    '\n': '\\n',
    '\r': '\\r',
    '\t': '\\t',
}
for i in range(0x20):
    ESCAPE_DCT.setdefault(chr(i), '\\u{0:04x}'.format(i))
    #ESCAPE_DCT.setdefault(chr(i), '\\u%04x' % (i,))

INFINITY = float('inf')
FLOAT_REPR = float.__repr__

def encode_basestring(s):
    """Return a JSON representation of a Python string

    """
    def replace(match):
        return ESCAPE_DCT[match.group(0)]
    return '"' + ESCAPE.sub(replace, s) + '"'


def py_encode_basestring_ascii(s):
    """Return an ASCII-only JSON representation of a Python string

    """
    if isinstance(s, str) and HAS_UTF8.search(s) is not None:
        s = s.decode('utf-8')
    def replace(match):
        s = match.group(0)
        try:
            return ESCAPE_DCT[s]
        except KeyError:
            n = ord(s)
            if n < 0x10000:
                return '\\u{0:04x}'.format(n)
                #return '\\u%04x' % (n,)
            else:
                # surrogate pair
                n -= 0x10000
                s1 = 0xd800 | ((n >> 10) & 0x3ff)
                s2 = 0xdc00 | (n & 0x3ff)
                return '\\u{0:04x}\\u{1:04x}'.format(s1, s2)
                #return '\\u%04x\\u%04x' % (s1, s2)
    return '"' + str(ESCAPE_ASCII.sub(replace, s)) + '"'


encode_basestring_ascii = (
    c_encode_basestring_ascii or py_encode_basestring_ascii)

key_filter = re.compile("[^a-zA-Z_0-9]")
key_filter_equal = {"require","false","for","function","if","nil","not","or","while","then","true","until","end","in","local","repeat","return","break","do","else","and","elseif"}
def format_key(s):
       if isinstance(s, (int, long, float)):
              return '['+str(s)+']'

       try:
              int(s)
              return '["'+s+'"]'
       except Exception, e:
              pass

       for f in key_filter_equal:
              if s == f:
                     return '["'+s+'"]'

       if (ord(s[0]) >= ord("0") and ord(s[0]) <= ord("9")) or key_filter.search(s):
              return '["'+s+'"]'

       return s

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

    Supports the following objects and types by default:

    +-------------------+---------------+
    | Python            | JSON          |
    +===================+===============+
    | dict              | 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=True, sort_keys=False,
            indent=None, separators=None, encoding='utf-8', default=None):
        """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 default), all non-ASCII
        characters in the output are escaped with \uXXXX sequences,
        and the results are str instances consisting of ASCII
        characters only.  If ensure_ascii is False, a result may be a
        unicode instance.  This usually happens if the input contains
        unicode strings or the *encoding* parameter is used.

        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, then NaN, Infinity, and -Infinity will be
        encoded as such.  This behavior is not JSON specification compliant,
        but is consistent with most JavaScript based encoders and decoders.
        Otherwise, it will be a ValueError to encode such floats.

        If sort_keys is true, then the output of dictionaries will be
        sorted by key; this is useful for regression tests to ensure
        that JSON serializations can be compared on a day-to-day basis.

        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.  Since the default
        item separator is ', ',  the output might include trailing
        whitespace when indent is specified.  You can use
        separators=(',', ': ') to avoid this.

        If specified, separators should be a (item_separator, key_separator)
        tuple.  The default is (', ', ': ').  To get the most compact JSON
        representation you should specify (',', ':') to eliminate whitespace.

        If specified, default is a function that gets called for objects
        that can't otherwise be serialized.  It should return a JSON encodable
        version of the object or raise a ``TypeError``.

        If encoding is not None, then all input strings will be
        transformed into unicode using that encoding prior to JSON-encoding.
        The default is UTF-8.

        """

        self.skipkeys = skipkeys
        self.ensure_ascii = ensure_ascii
        self.check_circular = check_circular
        self.allow_nan = allow_nan
        self.sort_keys = sort_keys
        self.indent = indent
        if separators is not None:
            self.item_separator, self.key_separator = separators
        if default is not None:
            self.default = default
        self.encoding = encoding

    def default(self, o):
        """Implement this method in a subclass such that it returns
        a serializable object for ``o``, or calls the base implementation
        (to raise a ``TypeError``).

        For example, to support arbitrary iterators, you could
        implement default like this::

            def default(self, o):
                try:
                    iterable = iter(o)
                except TypeError:
                    pass
                else:
                    return list(iterable)
                # Let the base class default method raise the TypeError
                return JSONEncoder.default(self, o)

        """
        raise TypeError(repr(o) + " is not JSON serializable")

    def encode(self, o):
        """Return a JSON string representation of a Python data structure.

        >>> JSONEncoder().encode({"foo": ["bar", "baz"]})
        '{"foo": ["bar", "baz"]}'

        """
        # This is for extremely simple cases and benchmarks.
        if isinstance(o, basestring):
            if isinstance(o, str):
                _encoding = self.encoding
                if (_encoding is not None
                        and not (_encoding == 'utf-8')):
                    o = o.decode(_encoding)
            if self.ensure_ascii:
                return encode_basestring_ascii(o)
            else:
                return encode_basestring(o)
        # This doesn't pass the iterator directly to ''.join() because the
        # exceptions aren't as detailed.  The list call should be roughly
        # equivalent to the PySequence_Fast that ''.join() would do.
        chunks = self.iterencode(o, _one_shot=True)
        if not isinstance(chunks, (list, tuple)):
            chunks = list(chunks)
        return ''.join(chunks)

    def iterencode(self, o, _one_shot=False):
        """Encode the given object and yield each string
        representation as available.

        For example::

            for chunk in JSONEncoder().iterencode(bigobject):
                mysocket.write(chunk)

        """
        if self.check_circular:
            markers = {}
        else:
            markers = None
        if self.ensure_ascii:
            _encoder = encode_basestring_ascii
        else:
            _encoder = encode_basestring
        if self.encoding != 'utf-8':
            def _encoder(o, _orig_encoder=_encoder, _encoding=self.encoding):
                if isinstance(o, str):
                    o = o.decode(_encoding)
                return _orig_encoder(o)

        def floatstr(o, allow_nan=self.allow_nan,
                _repr=FLOAT_REPR, _inf=INFINITY, _neginf=-INFINITY):
            # Check for specials.  Note that this type of test is processor
            # and/or platform-specific, so do tests which don't depend on the
            # internals.

            if o != o:
                text = 'NaN'
            elif o == _inf:
                text = 'Infinity'
            elif o == _neginf:
                text = '-Infinity'
            else:
                return _repr(o)

            if not allow_nan:
                raise ValueError(
                    "Out of range float values are not JSON compliant: " +
                    repr(o))

            return text


        if (_one_shot and c_make_encoder is not None
                and self.indent is None and not self.sort_keys):
            _iterencode = c_make_encoder(
                markers, self.default, _encoder, self.indent,
                self.key_separator, self.item_separator, self.sort_keys,
                self.skipkeys, self.allow_nan)
        else:
            _iterencode = _make_iterencode(
                markers, self.default, _encoder, self.indent, floatstr,
                self.key_separator, self.item_separator, self.sort_keys,
                self.skipkeys, _one_shot)
        return _iterencode(o, 0)

def _make_iterencode(markers, _default, _encoder, _indent, _floatstr,
        _key_separator, _item_separator, _sort_keys, _skipkeys, _one_shot,
        ## HACK: hand-optimized bytecode; turn globals into locals
        ValueError=ValueError,
        basestring=basestring,
        dict=dict,
        float=float,
        id=id,
        int=int,
        isinstance=isinstance,
        list=list,
        long=long,
        str=str,
        tuple=tuple,
    ):

    def _iterencode_list(lst, _current_indent_level):
        if not lst:
            yield '{}'
            return
        if markers is not None:
            markerid = id(lst)
            if markerid in markers:
                raise ValueError("Circular reference detected")
            markers[markerid] = lst
        buf = '{'
        if _indent is not None:
            _current_indent_level += 1
            newline_indent = '\n' + (' ' * (_indent * _current_indent_level))
            separator = _item_separator + newline_indent
            buf += newline_indent
        else:
            newline_indent = None
            separator = _item_separator
        first = True
        for value in lst:
            if first:
                first = False
            else:
                buf = separator
            if isinstance(value, basestring):
                yield buf + _encoder(value)
            elif value is None:
                yield buf + 'null'
            elif value is True:
                yield buf + 'true'
            elif value is False:
                yield buf + 'false'
            elif isinstance(value, (int, long)):
                yield buf + str(value)
            elif isinstance(value, float):
                yield buf + _floatstr(value)
            else:
                yield buf
                if isinstance(value, (list, tuple)):
                    chunks = _iterencode_list(value, _current_indent_level)
                elif isinstance(value, dict):
                    chunks = _iterencode_dict(value, _current_indent_level)
                else:
                    chunks = _iterencode(value, _current_indent_level)
                for chunk in chunks:
                    yield chunk
        if newline_indent is not None:
            _current_indent_level -= 1
            yield '\n' + (' ' * (_indent * _current_indent_level))
        yield '}'
        if markers is not None:
            del markers[markerid]

    def _iterencode_dict(dct, _current_indent_level):
        if not dct:
            yield '{}'
            return
        if markers is not None:
            markerid = id(dct)
            if markerid in markers:
                raise ValueError("Circular reference detected")
            markers[markerid] = dct
        yield '{'
        if _indent is not None:
            _current_indent_level += 1
            newline_indent = '\n' + (' ' * (_indent * _current_indent_level))
            item_separator = _item_separator + newline_indent
            yield newline_indent
        else:
            newline_indent = None
            item_separator = _item_separator
        first = True
        if _sort_keys:
            items = sorted(dct.items(), key=lambda kv: kv[0])
        else:
            items = dct.iteritems()
        for key, value in items:
            if isinstance(key, basestring):
                pass
            # JavaScript is weakly typed for these, so it makes sense to
            # also allow them.  Many encoders seem to do something like this.
            elif isinstance(key, float):
                pass
            elif key is True:
                key = 'true'
            elif key is False:
                key = 'false'
            elif key is None:
                key = 'null'
            elif isinstance(key, (int, long)):
                pass
            elif _skipkeys:
                continue
            else:
                raise TypeError("key " + repr(key) + " is not a string")
            if first:
                first = False
            else:
                yield item_separator
            yield format_key(key)                
            yield _key_separator
            if isinstance(value, basestring):
                yield _encoder(value)
            elif value is None:
                yield 'null'
            elif value is True:
                yield 'true'
            elif value is False:
                yield 'false'
            elif isinstance(value, (int, long)):
                yield str(value)
            elif isinstance(value, float):
                yield _floatstr(value)
            else:
                if isinstance(value, (list, tuple)):
                    chunks = _iterencode_list(value, _current_indent_level)
                elif isinstance(value, dict):
                    chunks = _iterencode_dict(value, _current_indent_level)
                else:
                    chunks = _iterencode(value, _current_indent_level)
                for chunk in chunks:
                    yield chunk
        if newline_indent is not None:
            _current_indent_level -= 1
            yield '\n' + (' ' * (_indent * _current_indent_level))
        yield '}'
        if markers is not None:
            del markers[markerid]

    def _iterencode(o, _current_indent_level):
        if isinstance(o, basestring):
            yield _encoder(o)
        elif o is None:
            yield 'null'
        elif o is True:
            yield 'true'
        elif o is False:
            yield 'false'
        elif isinstance(o, (int, long)):
            yield str(o)
        elif isinstance(o, float):
            yield _floatstr(o)
        elif isinstance(o, (list, tuple)):
            for chunk in _iterencode_list(o, _current_indent_level):
                yield chunk
        elif isinstance(o, dict):
            for chunk in _iterencode_dict(o, _current_indent_level):
                yield chunk
        else:
            if markers is not None:
                markerid = id(o)
                if markerid in markers:
                    raise ValueError("Circular reference detected")
                markers[markerid] = o
            o = _default(o)
            for chunk in _iterencode(o, _current_indent_level):
                yield chunk
            if markers is not None:
                del markers[markerid]

    return _iterencode


def dumps(obj, skipkeys=False, ensure_ascii=True, check_circular=True,
              allow_nan=True, cls=None, indent=None, separators=None,
              encoding='utf-8', default=None, sort_keys=False, **kw):
       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, encoding=encoding, default=default,
              sort_keys=sort_keys, **kw).encode(obj)

typescript.py

"""Implementation of JSONEncoder
"""
import re

# try:
#     from _json import encode_basestring_ascii as c_encode_basestring_ascii
# except ImportError:
c_encode_basestring_ascii = None
# try:
#     from _json import make_encoder as c_make_encoder
# except ImportError:
c_make_encoder = None

ESCAPE = re.compile(r'[\x00-\x1f\\"\b\f\n\r\t]')
ESCAPE_ASCII = re.compile(r'([\\"]|[^\ -~])')
HAS_UTF8 = re.compile(r'[\x80-\xff]')
ESCAPE_DCT = {
	'\\': '\\\\',
	'"': '\\"',
	'\b': '\\b',
	'\f': '\\f',
	'\n': '\\n',
	'\r': '\\r',
	'\t': '\\t',
}
for i in range(0x20):
	ESCAPE_DCT.setdefault(chr(i), '\\u{0:04x}'.format(i))
	#ESCAPE_DCT.setdefault(chr(i), '\\u%04x' % (i,))

INFINITY = float('inf')
FLOAT_REPR = repr

def encode_basestring(s):
	"""Return a JSON representation of a Python string
	"""
	def replace(match):
		return ESCAPE_DCT[match.group(0)]
	return ESCAPE.sub(replace, s)


def py_encode_basestring_ascii(s):
	"""Return an ASCII-only JSON representation of a Python string
	"""
	if isinstance(s, str) and HAS_UTF8.search(s) is not None:
		s = s.decode('utf-8')
	def replace(match):
		s = match.group(0)
		try:
			return ESCAPE_DCT[s]
		except KeyError:
			n = ord(s)
			if n < 0x10000:
				return '\\u{0:04x}'.format(n)
				#return '\\u%04x' % (n,)
			else:
				# surrogate pair
				n -= 0x10000
				s1 = 0xd800 | ((n >> 10) & 0x3ff)
				s2 = 0xdc00 | (n & 0x3ff)
				return '\\u{0:04x}\\u{1:04x}'.format(s1, s2)
				#return '\\u%04x\\u%04x' % (s1, s2)
	return str(ESCAPE_ASCII.sub(replace, s))

key_filter = re.compile("[^a-zA-Z_0-9]")
key_filter_equal = {"require","false","for","function","if","nil","not","or","while","then","true","until","end","in","local","repeat","return","break","do","else","and","elseif"}
def format_key(s):
	if isinstance(s, (int, long, float)):
		return '['+str(s)+']'

	try:
		int(s)
		return '["'+s+'"]'
	except Exception, e:
		pass

	for f in key_filter_equal:
		if s == f:
			return '["'+s+'"]'

	if (ord(s[0]) >= ord("0") and ord(s[0]) <= ord("9")) or key_filter.search(s):
		return '["'+s+'"]'

	return s


encode_basestring_ascii = (
	c_encode_basestring_ascii or py_encode_basestring_ascii)

def dict_to_array(dct):
	array = [None] * len(dct)
	for key, value in dct.iteritems():
		if type(key) == int:
			try:
				array[key-1] = value
			except Exception as e:
				break

	for item in array:
		if not item:
			return
	return array


class JSONEncoder(object):
	"""Extensible JSON <http://json.org> encoder for Python data structures.
	Supports the following objects and types by default:
	+-------------------+---------------+
	| Python            | JSON          |
	+===================+===============+
	| dict              | 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=True, sort_keys=False,
			indent=None, separators=None, encoding='utf-8', default=None):
		"""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 default), all non-ASCII
		characters in the output are escaped with \uXXXX sequences,
		and the results are str instances consisting of ASCII
		characters only.  If ensure_ascii is False, a result may be a
		unicode instance.  This usually happens if the input contains
		unicode strings or the *encoding* parameter is used.
		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, then NaN, Infinity, and -Infinity will be
		encoded as such.  This behavior is not JSON specification compliant,
		but is consistent with most JavaScript based encoders and decoders.
		Otherwise, it will be a ValueError to encode such floats.
		If sort_keys is true, then the output of dictionaries will be
		sorted by key; this is useful for regression tests to ensure
		that JSON serializations can be compared on a day-to-day basis.
		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.  Since the default
		item separator is ', ',  the output might include trailing
		whitespace when indent is specified.  You can use
		separators=(',', ': ') to avoid this.
		If specified, separators should be a (item_separator, key_separator)
		tuple.  The default is (', ', ': ').  To get the most compact JSON
		representation you should specify (',', ':') to eliminate whitespace.
		If specified, default is a function that gets called for objects
		that can't otherwise be serialized.  It should return a JSON encodable
		version of the object or raise a ``TypeError``.
		If encoding is not None, then all input strings will be
		transformed into unicode using that encoding prior to JSON-encoding.
		The default is UTF-8.
		"""

		self.skipkeys = skipkeys
		self.ensure_ascii = ensure_ascii
		self.check_circular = check_circular
		self.allow_nan = allow_nan
		self.sort_keys = sort_keys
		self.indent = indent
		if separators is not None:
			self.item_separator, self.key_separator = separators
		if default is not None:
			self.default = default
		self.encoding = encoding

	def default(self, o):
		"""Implement this method in a subclass such that it returns
		a serializable object for ``o``, or calls the base implementation
		(to raise a ``TypeError``).
		For example, to support arbitrary iterators, you could
		implement default like this::
			def default(self, o):
				try:
					iterable = iter(o)
				except TypeError:
					pass
				else:
					return list(iterable)
				# Let the base class default method raise the TypeError
				return JSONEncoder.default(self, o)
		"""
		raise TypeError(repr(o) + " is not JSON serializable")

	def encode(self, o):
		"""Return a JSON string representation of a Python data structure.
		>>> JSONEncoder().encode({"foo": ["bar", "baz"]})
		'{"foo": ["bar", "baz"]}'
		"""
		# This is for extremely simple cases and benchmarks.
		if isinstance(o, basestring):
			if isinstance(o, str):
				_encoding = self.encoding
				if (_encoding is not None
						and not (_encoding == 'utf-8')):
					o = o.decode(_encoding)
			if self.ensure_ascii:
				return encode_basestring_ascii(o)
			else:
				return encode_basestring(o)
		# This doesn't pass the iterator directly to ''.join() because the
		# exceptions aren't as detailed.  The list call should be roughly
		# equivalent to the PySequence_Fast that ''.join() would do.
		chunks = self.iterencode(o, _one_shot=True)
		if not isinstance(chunks, (list, tuple)):
			chunks = list(chunks)
		return ''.join(chunks)

	def iterencode(self, o, _one_shot=False):
		"""Encode the given object and yield each string
		representation as available.
		For example::
			for chunk in JSONEncoder().iterencode(bigobject):
				mysocket.write(chunk)
		"""
		if self.check_circular:
			markers = {}
		else:
			markers = None
		if self.ensure_ascii:
			_encoder = encode_basestring_ascii
		else:
			_encoder = encode_basestring
		if self.encoding != 'utf-8':
			def _encoder(o, _orig_encoder=_encoder, _encoding=self.encoding):
				if isinstance(o, str):
					o = o.decode(_encoding)
				return _orig_encoder(o)

		def floatstr(o, allow_nan=self.allow_nan,
				_repr=FLOAT_REPR, _inf=INFINITY, _neginf=-INFINITY):
			# Check for specials.  Note that this type of test is processor
			# and/or platform-specific, so do tests which don't depend on the
			# internals.

			if o != o:
				text = 'NaN'
			elif o == _inf:
				text = 'Infinity'
			elif o == _neginf:
				text = '-Infinity'
			else:
				return _repr(o)

			if not allow_nan:
				raise ValueError(
					"Out of range float values are not JSON compliant: " +
					repr(o))

			return text


		if (_one_shot and c_make_encoder is not None
				and self.indent is None and not self.sort_keys):
			_iterencode = c_make_encoder(
				markers, self.default, _encoder, self.indent,
				self.key_separator, self.item_separator, self.sort_keys,
				self.skipkeys, self.allow_nan)
		else:
			_iterencode = _make_iterencode(
				markers, self.default, _encoder, self.indent, floatstr,
				self.key_separator, self.item_separator, self.sort_keys,
				self.skipkeys, _one_shot)
		return _iterencode(o, 0)

def _make_iterencode(markers, _default, _encoder, _indent, _floatstr,
		_key_separator, _item_separator, _sort_keys, _skipkeys, _one_shot,
		## HACK: hand-optimized bytecode; turn globals into locals
		ValueError=ValueError,
		basestring=basestring,
		dict=dict,
		float=float,
		id=id,
		int=int,
		isinstance=isinstance,
		list=list,
		long=long,
		str=str,
		tuple=tuple,
	):

	def _iterencode_list(lst, _current_indent_level):
		if not lst:
			yield '[]'
			return
		if markers is not None:
			markerid = id(lst)
			if markerid in markers:
				raise ValueError("Circular reference detected")
			markers[markerid] = lst
		buf = '['
		if _indent is not None:
			_current_indent_level += 1
			newline_indent = '\n' + (' ' * (_indent * _current_indent_level))
			separator = _item_separator + newline_indent
			buf += newline_indent
		else:
			newline_indent = None
			separator = _item_separator
		first = True
		for value in lst:
			if first:
				first = False
			else:
				buf = separator
			if isinstance(value, basestring):
				yield buf + '"' + _encoder(value) + '"'
			elif value is None:
				yield buf + 'null'
			elif value is True:
				yield buf + 'true'
			elif value is False:
				yield buf + 'false'
			elif isinstance(value, (int, long)):
				yield buf + str(value)
			elif isinstance(value, float):
				yield buf + _floatstr(value)
			else:
				yield buf
				if isinstance(value, (list, tuple)):
					chunks = _iterencode_list(value, _current_indent_level)
				elif isinstance(value, dict):
					array = dict_to_array(value)
					if array:
						chunks = _iterencode_list(array, _current_indent_level)
					else:
						chunks = _iterencode_dict(value, _current_indent_level)
				else:
					chunks = _iterencode(value, _current_indent_level)
				for chunk in chunks:
					yield chunk
		if newline_indent is not None:
			_current_indent_level -= 1
			yield _item_separator + '\n' + (' ' * (_indent * _current_indent_level))
		yield ']'
		if markers is not None:
			del markers[markerid]

	def _iterencode_dict(dct, _current_indent_level):
		if not dct:
			yield '{}'
			return 

		if markers is not None:
			markerid = id(dct)
			if markerid in markers:
				raise ValueError("Circular reference detected")
			markers[markerid] = dct
		yield '{'
		if _indent is not None:
			_current_indent_level += 1
			newline_indent = '\n' + (' ' * (_indent * _current_indent_level))
			item_separator = _item_separator + newline_indent
			yield newline_indent
		else:
			newline_indent = None
			item_separator = _item_separator
		first = True
		if _sort_keys:
			items = sorted(dct.items(), key=lambda kv: kv[0])
		else:
			items = dct.iteritems()
		for key, value in items:
			if isinstance(key, basestring):
				pass
			# JavaScript is weakly typed for these, so it makes sense to
			# also allow them.  Many encoders seem to do something like this.
			elif isinstance(key, float):
				pass
			elif key is True:
				key = 'true'
			elif key is False:
				key = 'false'
			elif key is None:
				key = 'null'
			elif isinstance(key, (int, long)):
				pass
			elif _skipkeys:
				continue
			else:
				raise TypeError("key " + repr(key) + " is not a string")
			if first:
				first = False
			else:
				yield item_separator
			yield format_key(key)
			yield _key_separator
			if isinstance(value, basestring):
				yield '"' + _encoder(value) + '"'
			elif value is None:
				yield 'null'
			elif value is True:
				yield 'true'
			elif value is False:
				yield 'false'
			elif isinstance(value, (int, long)):
				yield str(value)
			elif isinstance(value, float):
				yield _floatstr(value)
			else:
				if isinstance(value, (list, tuple)):
					chunks = _iterencode_list(value, _current_indent_level)
				elif isinstance(value, dict):
					array = dict_to_array(value)
					if array:
						chunks = _iterencode_list(array, _current_indent_level)
					else:					
						chunks = _iterencode_dict(value, _current_indent_level)
				else:
					chunks = _iterencode(value, _current_indent_level)
				for chunk in chunks:
					yield chunk
			
		if newline_indent is not None:
			_current_indent_level -= 1
			yield _item_separator + '\n' + (' ' * (_indent * _current_indent_level))
		yield '}'
		if markers is not None:
			del markers[markerid]

	def _iterencode(o, _current_indent_level):
		if isinstance(o, basestring):
			yield _encoder(o)
		elif o is None:
			yield 'null'
		elif o is True:
			yield 'true'
		elif o is False:
			yield 'false'
		elif isinstance(o, (int, long)):
			yield o
		elif isinstance(o, float):
			yield o
		elif isinstance(o, (list, tuple)):
			for chunk in _iterencode_list(o, _current_indent_level):
				yield chunk
		elif isinstance(o, dict):
			array = dict_to_array(o)
			if array:
				for chunk in _iterencode_list(array, _current_indent_level):
					yield chunk
			else:			
				for chunk in _iterencode_dict(o, _current_indent_level):
					yield chunk
		else:
			if markers is not None:
				markerid = id(o)
				if markerid in markers:
					raise ValueError("Circular reference detected")
				markers[markerid] = o
			o = _default(o)
			for chunk in _iterencode(o, _current_indent_level):
				yield chunk
			if markers is not None:
				del markers[markerid]

	return _iterencode


def dumps(obj, skipkeys=False, ensure_ascii=True, check_circular=True,
		allow_nan=True, cls=None, indent=None, separators=None,
		encoding='utf-8', 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``, ``unicode``, ``int``, ``long``, ``float``, ``bool``, ``None``)
	will be skipped instead of raising a ``TypeError``.
	If ``ensure_ascii`` is false, all non-ASCII characters are not escaped, and
	the return value may be a ``unicode`` instance. See ``dump`` for details.
	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.  Since the default item separator is ``', '``,  the
	output might include trailing whitespace when ``indent`` is specified.
	You can use ``separators=(',', ': ')`` to avoid this.
	If ``separators`` is an ``(item_separator, dict_separator)`` tuple
	then it will be used instead of the default ``(', ', ': ')`` separators.
	``(',', ':')`` is the most compact JSON representation.
	``encoding`` is the character encoding for str instances, default is UTF-8.
	``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
	#     encoding == 'utf-8' and default is None and not sort_keys and not kw):
	#     return _default_encoder.encode(obj)
	if cls is None:
		cls = JSONEncoder
	return "export default " + cls(
		skipkeys=skipkeys, ensure_ascii=ensure_ascii,
		check_circular=check_circular, allow_nan=allow_nan, indent=indent,
		separators=separators, encoding=encoding, default=default,
		sort_keys=sort_keys, **kw).encode(obj) + ";\n"