How Can I Serialize Decimal Objects in JSON Without Losing Precision in Python?

Serialization of Decimal Objects in Python's JSON

Encapsulating numbers as Decimal objects poses a challenge during JSON serialization. To achieve {'x': 3.9}, a float conversion is insufficient, resulting in an inaccurate '3.8999999999999999'.

Using SimpleJSON

SimpleJSON 2.1 and above offer a solution with native support for Decimal types. By default, use_decimal is enabled, resulting in the desired serialization:

import simplejson as json

json.dumps(Decimal('3.9'))  # Output: '3.9'

Stay Tuned

Anticipate the potential inclusion of this feature in Python's standard library to enhance JSON serialization capabilities for Decimal objects.

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