[Tutor] Accessing Specific Dictionary items
Steven D'Aprano
steve at pearwood.info
Tue Aug 2 00:37:59 CEST 2011
Mike Nickey wrote:
> The input being used is through pygeoip.
> Using this I am pulling the data by IP and from what I am reading this
> populates as a dictionary.
>
> Here is some of the output that I can show currently
> [{'city': 'Buena Park', 'region_name': 'CA', 'area_code': 714},
> {'city': 'Wallingford', 'region_name': 'CT', 'area_code': 203},
> {'city': 'Schenectady', 'region_name': 'NY', 'area_code': 518},
> {'city': 'Athens', 'region_name': '35'}]
>
> I'd like to have an output similar to this:
> 'Buena Park', 'Wallingford', 'Schenectady','Athens' pulled by the
> "city" keys that are used in the returns.
What do you mean, "the returns"?
If all you want is a list of cities, that's easy:
cities = [d['city'] for d in list_of_dicts]
or if you prefer a more verbose way:
cities = []
for d in list_of_dicts:
cities.append(d['city'])
To get the list sorted, just sort it afterwards:
cities.sort()
> I think the easiest way to
> approach this would be simply to use the .append and populate a list
> but I don't know how to pull an item by key value from the dictionary
> returns.
The same way you would pull an item by key from any other dict.
--
Steven
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