Serialization of those data types is not defined in the JSON standard: https://www.json.org/
so you have to extend the parser/serializers to support them. On 02.11.2018 17:19, Philip Martin wrote: > Is there any reason why date, datetime, and UUID objects automatically > serialize to default strings using the csv module, but json.dumps throws > an error as a default? i.e. > > import csv > import json > import io > from datetime import date > > stream = io.StringIO() > writer = csv.writer(stream) > writer.writerow([date(2018, 11, 2)]) > # versus > json.dumps(date(2018, 11, 2)) > > > > _______________________________________________ > Python-ideas mailing list > Python-ideas@python.org > https://mail.python.org/mailman/listinfo/python-ideas > Code of Conduct: http://python.org/psf/codeofconduct/ > -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Experts (#1, Nov 02 2018) >>> Python Projects, Coaching and Consulting ... http://www.egenix.com/ >>> Python Database Interfaces ... http://products.egenix.com/ >>> Plone/Zope Database Interfaces ... http://zope.egenix.com/ ________________________________________________________________________ ::: We implement business ideas - efficiently in both time and costs ::: eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 http://www.egenix.com/company/contact/ http://www.malemburg.com/ _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/