def iterencode(self, o, _one_shot=False):
"""The sole purpose of defining a custom JSONEncoder class is to
override floatstr() inner function, or more specifically the
representation of NaN and +/-float('inf') values in a JSON. Although
Infinity values are not supported by JSON standard, we still can
convince Javascript JSON.parse() to create a Javascript Infinity
object if we feed a token `1e+999` to it.
"""
if self.check_circular:
markers = {}
else:
markers = None
if self.ensure_ascii:
_encoder = encoder.encode_basestring_ascii
else:
_encoder = encoder.encode_basestring
# On Python 3, JSONEncoder has no more encoding attribute, it produces
# an Unicode string
if six.PY2 and 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=encoder.FLOAT_REPR,
_inf=encoder.INFINITY, _neginf=-encoder.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 = self.nan_str
elif o == _inf:
text = self.inf_str
elif o == _neginf:
text = '-' + self.inf_str
else:
return _repr(o)
if not allow_nan:
raise ValueError(
_("Out of range float values are not JSON compliant: %r") %
o)
return text
_iterencode = json.encoder._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)
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