python, sorting a dict/json

[Ed]

oops - my bad - I completely missed the Python context

On Sat, Feb 23, 2019 at 1:18 AM der.hans <PLUGd at lufthans.com> wrote:
>
> Am 22. Feb, 2019 schwätzte James Dugger so:
>
> moin moin James,
>
> Thanks!
>
> The lamda is what I needed. It simplified what I was doing.
>
> I also added datetime.strptime() for when I need a date. I'm leaving the
> field as an int for sorting for now.
>
> ciao,
>
> der.hans
>
> >> import json
> >> from datetime import datetime
> >>
> >> with open('testp.json') as f:
> >>     data = json.load(f)
> >>
> >> for i in data['pubs']:
> >>     pub_date = datetime.strptime(i['date'], '%Y%m%d')
> >>     i['date'] = pub_date
> >>
> >> pub_list = sorted(data['pubs'], key=lambda k: k['date'])
> >>
> >> print(pub_list)
> >>
> >> open parses the json file into a python dictionary.  Currently the format
> > of your json will produce a dictionary with one key 'pubs' and a value
> > formatted as a python list of nested dictionaries.
> >
> > The for loop targets the list inside the main dictionary and first converts
> > the date to a python date object.
> >
> > Then simply use the sorted method with a lambda expression to sort the
> > order of dictionaries by the newly created date objects.
> >
> > Yor initial date values are integers.  You will need to either store them
> > in the json object as strings or convert them so that datetime.strptime()
> > can parse them.
> >
> > I'm sure there are other ways to do this but this was the fastest given the
> > json format.
> >
> > On Fri, Feb 22, 2019 at 12:21 PM der.hans <PLUGd at lufthans.com> wrote:
> >
> >> moin moin,
> >>
> >> I'm trying to sort some data that is currently in json being imported into
> >> a dict.
> >>
> >> It's essentially bibliography information, but without a unique ID.
> >>
> >> I mostly want to sort on publication date, but also want to group by
> >> publication. There could be multiple publications on the same date.
> >>
> >> Currently using a json format like:
> >>
> >> {
> >>   "pubs": [
> >>    {
> >>     "date": 20190222
> >>     "title": "a title"
> >>     "url": "https://some.domain/page.html"
> >>    },
> >>    {
> >>     "date": 20190221
> >>     "title": "another title"
> >>     "url": "https://some.other.domain/page.html"
> >>    }
> >>   ]
> >> }
> >>
> >> Format can change if that helps.
> >>
> >> I want to be able to display items in order. Mostly chronological, but
> >> also by other details.
> >>
> >> Any suggestions for how to sort them for display?
> >>
> >> A nice, but not required, feature would be sorting them for saving to disk
> >> as well.
> >>
> >> ciao,
> >>
> >> der.hans
> >> --
> >> #  https://www.LuftHans.com   https://www.PhxLinux.org
> >> # "You want weapons? We're in a library! Books! The best weapons in the
> >> # world! This room's the greatest arsenal we could have - arm yourselves!"
> >> # -- the Doctor: Doctor Who, Tooth and Claw, 2006
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> >
>
> --
> #  https://www.LuftHans.com   https://www.PhxLinux.org
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