从子字典中获取键，并从其中的键值对列表中获取值

Question

I have a dictionary called metadata. It has a length of 2 keys, 'status' and 'data'. I am only interested in the key 'data' and what lies within it. The subdictionary 'data' has 1,136 keys.

{'status': 'success',
 'data': {'async_tasks_count': [{'type': 'gauge',
    'help': 'Total number of async tasks spawned using spawn',
    'unit': ''}],
  'async_tasks_time_histogram': [{'type': 'histogram',
    'help': 'Time taken by async tasks',
    'unit': ''}],
  'attestation_production_cache_interaction_seconds': [{'type': 'histogram',
    'help': 'Time spent interacting with the attester cache',
    'unit': ''}],
  'attestation_production_cache_prime_seconds': [{'type': 'histogram',
    'help': 'Time spent loading a new state from the disk due to a cache miss',
    'unit': ''}]}

Within 'data' I need the Key and the Value of the 1st position (ie second elelment). For example the first Key within 'data' would be 'async_tasks_count' and the Value I need is 'Total number of async tasks spawned using spawn', the second Value.

It would be ideal to have them returned like:

('async_tasks_count' : 'Total number of async tasks spawned using spawn', 'async_tasks_time_histogram' : 'Time taken by async tasks', 'attestation_production_cache_interaction_seconds': 'Time spent interacting with the attester cache', 'attestation_production_cache_prime_seconds': 'Time spent loading a new state from the disk due to a cache miss')

I'm using Python3

Answer 1

You can loop through data dictionary and then extract help property from each item.

The item is the dictionary with the data property.

result = {}
for key, value in metadata['data'].items():
    result[ key ] = value[0].get('help')
    
print(result) # for viewing the result