modified: Allowed to specify alternative string for `NaN/Infinity/-Infinity` . #230

youkinjoh · 2018-08-25T03:56:18Z

cls and/or default can not replace specify string from nan/inf/-inf .

this commit modified to allow to specify alternative string for NaN/Infinity/-Infinity .

sample

import simplejson as json

print(json.dumps({'foo': 100}))
print(json.dumps({'foo': 'str'}))
print(json.dumps({'foo': None}))
print(json.dumps({'foo': True}))
print(json.dumps({'foo': False}))
print(json.dumps({'foo': float('nan')}))
print(json.dumps({'foo': float('inf')}))
print(json.dumps({'foo': float('-inf')}))
print(json.dumps({
    'foo': float('nan'),
    'bar': float('inf'),
    'baz': float('-inf'),
}))
print(json.dumps({
    'foo': float('nan'),
    'bar': float('inf'),
    'baz': float('-inf'),
}, alternative_nan='nan'))
print(json.dumps({
    'foo': float('nan'),
    'bar': float('inf'),
    'baz': float('-inf'),
}, alternative_pos_inf='posinf'))
print(json.dumps({
    'foo': float('nan'),
    'bar': float('inf'),
    'baz': float('-inf'),
}, alternative_neg_inf='neginf'))
print(json.dumps(
    {
        'foo': float('nan'),
        'bar': float('inf'),
        'baz': float('-inf'),
    },
    alternative_nan='nan',
    alternative_pos_inf='posinf',
    alternative_neg_inf='neginf'
))

result

{"foo": 100}
{"foo": "str"}
{"foo": null}
{"foo": true}
{"foo": false}
{"foo": NaN}
{"foo": Infinity}
{"foo": -Infinity}
{"foo": NaN, "bar": Infinity, "baz": -Infinity}
{"foo": nan, "bar": Infinity, "baz": -Infinity}
{"foo": NaN, "bar": posinf, "baz": -Infinity}
{"foo": NaN, "bar": Infinity, "baz": neginf}
{"foo": nan, "bar": posinf, "baz": neginf}

…finity` .

youkinjoh · 2018-08-25T06:20:46Z

purpose
- improve data compatibility
- however, conform to RFC perfectly

Python

import simplejson as json
from datetime import datetime

alt_nan = json.dumps({'__extendDataType__': 'number', 'value': 'NaN'})
alt_pos_inf = json.dumps({'__extendDataType__': 'number', 'value': 'Infinity'})
alt_neg_inf = json.dumps({'__extendDataType__': 'number', 'value': '-Infinity'})

def extend(obj):
    if isinstance(obj, datetime):
        return {
            '__extendDataType__': 'datetime',
            'value': obj.isoformat()
            }
    raise TypeError(repr(obj) + " is not JSON serializable")

data = {
    'foo': float('nan'),
    'bar': float('inf'),
    'baz': float('-inf'),
    'qux': datetime.now()
    }

print(json.dumps(
    data,
    default=extend,
    alternative_nan=alt_nan,
    alternative_pos_inf=alt_pos_inf,
    alternative_neg_inf=alt_neg_inf
    ))

Output

{"foo": {"__extendDataType__": "number", "value": "NaN"}, "bar": {"__extendDataType__": "number", "value": "Infinity"}, "baz": {"__extendDataType__": "number", "value": "-Infinity"}, "qux": {"__extendDataType__": "datetime", "value": "2018-08-25T15:03:46.244850"}}

JavaScript

var str = '{"foo": {"__extendDataType__": "number", "value": "NaN"}, "bar": {"__extendDataType__": "number", "value": "Infinity"}, "baz": {"__extendDataType__": "number", "value": "-Infinity"}, "qux": {"__extendDataType__": "datetime", "value": "2018-08-25T15:03:46.244850"}}';

var reviver = function(key, value) {
  if (typeof(value) !== 'object' || !('__extendDataType__' in value)) {
    return value;
  }
  switch(value.__extendDataType__) {
  case 'number':
    switch(value.value) {
    case 'NaN': return Number.NaN;
    case 'Infinity': return Number.POSITIVE_INFINITY;
    case '-Infinity': return Number.NEGATIVE_INFINITY;
    }
  case 'datetime':
    return new Date(value.value);
  }
};

console.log(JSON.parse(str, reviver));

modified: Allowed to specify alternative string for `NaN/Infinity/-In…

edbba04

…finity` .

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Uh oh!

modified: Allowed to specify alternative string for `NaN/Infinity/-Infinity` . #230

modified: Allowed to specify alternative string for `NaN/Infinity/-Infinity` . #230

Uh oh!

youkinjoh commented Aug 25, 2018

Uh oh!

youkinjoh commented Aug 25, 2018

Uh oh!

Uh oh!

modified: Allowed to specify alternative string for NaN/Infinity/-Infinity . #230

Are you sure you want to change the base?

modified: Allowed to specify alternative string for NaN/Infinity/-Infinity . #230

Uh oh!

Conversation

youkinjoh commented Aug 25, 2018

Uh oh!

youkinjoh commented Aug 25, 2018

Uh oh!

Uh oh!

modified: Allowed to specify alternative string for `NaN/Infinity/-Infinity` . #230

modified: Allowed to specify alternative string for `NaN/Infinity/-Infinity` . #230