In which way would this be different to {**mapping1, **mapping2, **mapping3} ?
On 8 April 2018 at 22:18, Andrés Delfino <adelf...@gmail.com> wrote: > Hi! > > I thought that maybe dict could accept several mappings as positional > arguments, like this: > > class Dict4(dict): >> def __init__(self, *args, **kwargs): >> if len(args) > 1: >> if not all([isinstance(arg, dict) for arg in args]): >> raise TypeError('Dict4 expected instances of dict since >> multiple positional arguments were passed') >> >> temp = args[0].copy() >> >> for arg in args[1:]: >> temp.update(arg) >> >> super().__init__(temp, **kwargs) >> else: >> super().__init__(*args, **kwargs) >> > > AFAIK, this wouldn't create compatibility problems, since you can't pass > two positional arguments now anyways. > > It would be useful to solve the "sum/union dicts" discussion, for example: > requests.get(url, params=dict(params, {'foo': bar}) > > Whar are your thoughts? > > _______________________________________________ > Python-ideas mailing list > Python-ideas@python.org > https://mail.python.org/mailman/listinfo/python-ideas > Code of Conduct: http://python.org/psf/codeofconduct/ > > -- Daniel F. Moisset - UK Country Manager - Machinalis Limited www.machinalis.co.uk <http://www.machinalis.com> Skype: @dmoisset T: + 44 7398 827139 1 Fore St, London, EC2Y 9DT Machinalis Limited is a company registered in England and Wales. Registered number: 10574987.
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