port simplejson upgrade from the trunk #4136
json also now works only with unicode strings
Patch by Antoine Pitrou; updated by me
diff --git a/Lib/json/encoder.py b/Lib/json/encoder.py
index fa744c9..3c306ab 100644
--- a/Lib/json/encoder.py
+++ b/Lib/json/encoder.py
@@ -1,19 +1,19 @@
"""Implementation of JSONEncoder
"""
-
import re
-import math
try:
from _json import encode_basestring_ascii as c_encode_basestring_ascii
except ImportError:
c_encode_basestring_ascii = None
-
-__all__ = ['JSONEncoder']
+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]')
+HAS_UTF8 = re.compile(b'[\x80-\xff]')
ESCAPE_DCT = {
'\\': '\\\\',
'"': '\\"',
@@ -25,30 +25,12 @@
}
for i in range(0x20):
ESCAPE_DCT.setdefault(chr(i), '\\u{0:04x}'.format(i))
+ #ESCAPE_DCT.setdefault(chr(i), '\\u%04x' % (i,))
+# Assume this produces an infinity on all machines (probably not guaranteed)
+INFINITY = float('1e66666')
FLOAT_REPR = repr
-def floatstr(o, allow_nan=True):
- # 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 math.isnan(o):
- text = 'NaN'
- elif math.isinf(o):
- if math.copysign(1., o) == 1.:
- text = 'Infinity'
- else:
- text = '-Infinity'
- else:
- return FLOAT_REPR(o)
-
- if not allow_nan:
- msg = "Out of range float values are not JSON compliant: " + repr(o)
- raise ValueError(msg)
-
- return text
-
-
def encode_basestring(s):
"""Return a JSON representation of a Python string
@@ -59,8 +41,9 @@
def py_encode_basestring_ascii(s):
- if isinstance(s, bytes): # and HAS_UTF8.search(s) is not None:
- s = s.decode('utf-8')
+ """Return an ASCII-only JSON representation of a Python string
+
+ """
def replace(match):
s = match.group(0)
try:
@@ -69,20 +52,18 @@
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 '"' + (ESCAPE_ASCII.sub(replace, s)) + '"'
+ return '"' + ESCAPE_ASCII.sub(replace, s) + '"'
-if c_encode_basestring_ascii is not None:
- encode_basestring_ascii = c_encode_basestring_ascii
-else:
- encode_basestring_ascii = py_encode_basestring_ascii
-
+encode_basestring_ascii = (
+ c_encode_basestring_ascii or py_encode_basestring_ascii)
class JSONEncoder(object):
"""Extensible JSON <http://json.org> encoder for Python data structures.
@@ -113,33 +94,32 @@
implementation (to raise ``TypeError``).
"""
- __all__ = ['__init__', 'default', 'encode', 'iterencode']
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):
+ indent=None, separators=None, default=None):
"""Constructor for JSONEncoder, with sensible defaults.
- If skipkeys is False, then it is a TypeError to attempt
+ 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
+ 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
+ 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
+ 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
+ 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.
@@ -156,180 +136,26 @@
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
- self.current_indent_level = 0
if separators is not None:
self.item_separator, self.key_separator = separators
if default is not None:
self.default = default
- self.encoding = encoding
-
- def _newline_indent(self):
- return '\n' + (' ' * (self.indent * self.current_indent_level))
-
- def _iterencode_list(self, lst, markers=None):
- 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
- yield '['
- if self.indent is not None:
- self.current_indent_level += 1
- newline_indent = self._newline_indent()
- separator = self.item_separator + newline_indent
- yield newline_indent
- else:
- newline_indent = None
- separator = self.item_separator
- first = True
- for value in lst:
- if first:
- first = False
- else:
- yield separator
- for chunk in self._iterencode(value, markers):
- yield chunk
- if newline_indent is not None:
- self.current_indent_level -= 1
- yield self._newline_indent()
- yield ']'
- if markers is not None:
- del markers[markerid]
-
- def _iterencode_dict(self, dct, markers=None):
- 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 '{'
- key_separator = self.key_separator
- if self.indent is not None:
- self.current_indent_level += 1
- newline_indent = self._newline_indent()
- item_separator = self.item_separator + newline_indent
- yield newline_indent
- else:
- newline_indent = None
- item_separator = self.item_separator
- first = True
- if self.ensure_ascii:
- encoder = encode_basestring_ascii
- else:
- encoder = encode_basestring
- allow_nan = self.allow_nan
- if self.sort_keys:
- keys = list(dct.keys())
- keys.sort()
- items = [(k, dct[k]) for k in keys]
- else:
- items = iter(dct.items())
- _encoding = self.encoding
- _do_decode = (_encoding is not None
- and not (_encoding == 'utf-8'))
- for key, value in items:
- if isinstance(key, str):
- if _do_decode:
- key = key.decode(_encoding)
- elif isinstance(key, str):
- 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):
- key = floatstr(key, allow_nan)
- elif isinstance(key, (int, int)):
- key = str(key)
- elif key is True:
- key = 'true'
- elif key is False:
- key = 'false'
- elif key is None:
- key = 'null'
- elif self.skipkeys:
- continue
- else:
- raise TypeError("key {0!r} is not a string".format(key))
- if first:
- first = False
- else:
- yield item_separator
- yield encoder(key)
- yield key_separator
- for chunk in self._iterencode(value, markers):
- yield chunk
- if newline_indent is not None:
- self.current_indent_level -= 1
- yield self._newline_indent()
- yield '}'
- if markers is not None:
- del markers[markerid]
-
- def _iterencode(self, o, markers=None):
- if isinstance(o, str):
- if self.ensure_ascii:
- encoder = encode_basestring_ascii
- else:
- encoder = encode_basestring
- _encoding = self.encoding
- if (_encoding is not None and isinstance(o, str)
- and not (_encoding == 'utf-8')):
- o = o.decode(_encoding)
- 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, int)):
- yield str(o)
- elif isinstance(o, float):
- yield floatstr(o, self.allow_nan)
- elif isinstance(o, (list, tuple)):
- for chunk in self._iterencode_list(o, markers):
- yield chunk
- elif isinstance(o, dict):
- for chunk in self._iterencode_dict(o, markers):
- yield chunk
- else:
- if markers is not None:
- markerid = id(o)
- if markerid in markers:
- raise ValueError("Circular reference detected")
- markers[markerid] = o
- for chunk in self._iterencode_default(o, markers):
- yield chunk
- if markers is not None:
- del markers[markerid]
-
- def _iterencode_default(self, o, markers=None):
- newobj = self.default(o)
- return self._iterencode(newobj, markers)
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``).
+ """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::
+ For example, to support arbitrary iterators, you could
+ implement default like this::
def default(self, o):
try:
@@ -351,12 +177,7 @@
"""
# This is for extremely simple cases and benchmarks.
- if isinstance(o, (str, bytes)):
- if isinstance(o, bytes):
- _encoding = self.encoding
- if (_encoding is not None
- and not (_encoding == 'utf-8')):
- o = o.decode(_encoding)
+ if isinstance(o, str):
if self.ensure_ascii:
return encode_basestring_ascii(o)
else:
@@ -364,12 +185,14 @@
# 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 = list(self.iterencode(o))
+ chunks = self.iterencode(o, _one_shot=True)
+ if not isinstance(chunks, (list, tuple)):
+ chunks = list(chunks)
return ''.join(chunks)
- def iterencode(self, o):
- """Encode the given object and yield each string representation as
- available.
+ def iterencode(self, o, _one_shot=False):
+ """Encode the given object and yield each string
+ representation as available.
For example::
@@ -381,4 +204,218 @@
markers = {}
else:
markers = None
- return self._iterencode(o, markers)
+ if self.ensure_ascii:
+ _encoder = encode_basestring_ascii
+ else:
+ _encoder = encode_basestring
+
+ 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 not self.indent 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,
+ dict=dict,
+ float=float,
+ id=id,
+ int=int,
+ isinstance=isinstance,
+ list=list,
+ 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, str):
+ 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):
+ 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.items()
+ for key, value in items:
+ if isinstance(key, str):
+ 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):
+ key = _floatstr(key)
+ elif key is True:
+ key = 'true'
+ elif key is False:
+ key = 'false'
+ elif key is None:
+ key = 'null'
+ elif isinstance(key, int):
+ key = str(key)
+ elif _skipkeys:
+ continue
+ else:
+ raise TypeError("key " + repr(key) + " is not a string")
+ if first:
+ first = False
+ else:
+ yield item_separator
+ yield _encoder(key)
+ yield _key_separator
+ if isinstance(value, str):
+ 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):
+ 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, str):
+ 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, int)):
+ 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