| thiemowmde added a comment. |
This limitation is not on input values. Use the wbparsevalue API, which is what the wikidata.org UI does and what https://www.wikidata.org/wiki/Help:Statements#Quantitative_values describes, and you can have all kinds of inputs.
The resulting QuantityValue data structure must be in the format the Wikibase code base specifies in https://github.com/DataValues/Number/blob/master/src/DataValues/DecimalValue.php#L43 (a QuantityValue is constructed of 3 DecimalValues and the unit). This format does not use the numbers from the JSON spec, but strings, to avoid all kinds of rounding issues and data loss that happens when you enter the IEEE world. Pywikibot should do the same and avoid doing math on IEEE floating point numbers.
So yes, I'm afraid this is an issue in Pywikibot not following the Wikibase specifications.
Cc: thiemowmde, Tobias1984, Aklapper, StudiesWorld, pywikibot-bugs-list, ArthurPSmith, Mdupont, D3r1ck01, Izno, Wikidata-bugs, aude, jayvdb, Ricordisamoa, Mbch331
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