python - How can I access dictionary within a dictionary using a single variable?

Question

This question already has answers here: question from:https://stackoverflow.com/questions/65932721/how-can-i-access-dictionary-within-a-dictionary-using-a-single-variable

Answer 1

Your description of the data structure does not make much sense, but assuming dicts is a dictionary that contains a key team with a value that contains the key name. You can perform dynamic nested lookup using a list of keys and recursion-

def nested_lookup(d, keys):
    if len(keys) == 0:
        return d
    item = d[keys[0]]
    rest_keys = keys[1:]
    return nested_lookup(item, rest_keys)

Or, if you prefer succinct-ness, a lambda function-

nested_lookup = lambda d, ks: nested_lookup(d[ks[0]], ks[1:]) if len(ks) > 0 else d

You can use it like-

>>> nested_lookup({ 'team': { 'name': 5 } }, ['team', 'name'])
5
>>> nested_lookup({ 'team': { 'name': 5 } }, ['team'])
{'name': 5}
>>> nested_lookup({ 'team': { 'name': { 'more': [42, 47] } } }, ['team', 'name', 'more'])
[42, 47]