fjson

The json module in the Python standard library does not allow you to specify the format in which floats are written out the file. This module adds the float_format parameter.

import math
import fjson


data = {"a": 1, "b": math.pi}
string = fjson.dumps(data, float_format=".6e", indent=2, separators=(", ", ": "))
print(string)

{
  "a": 1,
  "b": 3.141593e+00
}

License

fjson is published under the MIT license.