precision problem with double_precision parameter

[glaucouri]

Hi all, i'm trying to serialize data from a numeric engine, so i use double_precision=15 because we handle very small numbers,
but i've found a strange behaviour

ujson ver==1.35

> from ujson import dumps
> dumps(0.9999999999999996, double_precision=14)
'1.0'
> dumps(0.9999999999999996, double_precision=15)
'0.1'

It seems related to the value of double_precision.

Is this expected?
Thank you

[hugovk]

Please can you retest with the latest version, 4.0.1? And also fix the typos in your example code?

[glaucouri]

For my use case i can test on py2 env, last available version is 2.0.3.
In this version parameter double_precision is deprecated
the problem doesn't appears any more.

[hugovk]

Ah yes, that reminds me, it was replaced because there were precision errors, see for example #393 (comment).

(And Python 2's no longer supported.)