How to retrieve data of a key in dictionary which is nested in list simultaneously-CodePudding

data = [
    {
        'name1': 'aaa',
    },
    {
        'name2': 'bbb',
    },
    {
        'name3': 'ccc',
    },
    {
        'name4': 'ddd',
    }
]

Now how can I retrieve data of key >>name1 (i.e aaa ) with index no. of the list simultaneously.

CodePudding user response：

Method

Use enumerate to provide index of each dictionary as you loop.
Use dictionary.items() to retrieve key, value pairs of each dictionary

Code

def get_value(data, key):
        ' Retrieves index of dictionary and value with key key'
        for i, d in enumerate(data):
            for k, v in d.items():
                if k == key:
                    return i, v    # return index and value of dictionary

Test

print(get_value(data, 'name1'))
# Output: (0, 'aaa')

CodePudding user response：

You access list with index as int, you access a dict with index as the key, no matter the type

data = [
    {'name1': 'aaa', },
    {'name2': 'bbb', },
    {'name3': 'ccc', },
    {'name4': 'ddd', }
]

x = data[0]['name1']
print(x)  # aaa

Example with key type int

data = [{'name1': 'aaa'}, {0: 'ddd'}]
x = data[1][0]
print(x)  # ddd