python convert nested data to array

Question

I want to convert original data to array , just like the second code block.

How to remove the dictionary key of the original data?

And how to convert dictionary to array?

original data:

result = {
    'Anna': [{
            'Name': 'Anna',
            'city': 'LA',
            'activity': 'run'
        },{
            'Name': 'Anna',
            'city': 'NY',
            'activity': 'sing'
        }
    ],
    'Ken': [{
            'Name': 'Ken',
            'city': 'JP',
            'activity': 'ride'
        },{
            'Name': 'Ken',
            'city': 'WA',
            'activity': 'climb'
        }
    ]
}

result = [   
        {
            'Name': 'Anna',
            'city': 'LA',
            'activity': 'run'
        },{
            'Name': 'Anna',
            'city': 'NY',
            'activity': 'sing'
        },{
            'Name': 'Ken',
            'city': 'JP',
            'activity': 'ride'
        },
            .
            .
            .
    ]

Can you show some code that you've already tried, and where you're stuck? — awarrier99
– awarrier99, Commented Apr 8, 2020 at 9:10
What have you tried? Post your code first or we can't help you — sportzpikachu
– sportzpikachu, Commented Apr 8, 2020 at 9:10
@GrijeshChauhan list(itertools.chain.from_iterable(result.values())) is more readable and possibly slightly more efficient. — Błotosmętek
– Błotosmętek, Commented Apr 8, 2020 at 9:19
@Błotosmętek not sure about efficiency, although list(...) version is portable across Python versions. — Grijesh Chauhan
– Grijesh Chauhan, Commented Apr 8, 2020 at 14:22

Snow bunting · Accepted Answer · 2020-04-08 09:19:52Z

2

I like doing nested list comprehensions. The following iterates first over all values in your dictionary (a list called x) and then over each element i in the list x.

[i for x in result.values() for i in x]

answered Apr 8, 2020 at 9:19

Snow bunting

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