Python: Retrieve the value of the nested key indicated by the given selector list from a dictionary or list
Python dictionary: Exercise-71 with Solution
Write a Python program to retrieve the value of the nested key indicated by the given selector list from a dictionary or list.
Sample Solution:
Python Code:
from functools import reduce
from operator import getitem
def test(d, selectors):
return reduce(getitem, selectors, d)
users = {
'Carla ': {
'name': {
'first': 'Carla ',
'last': 'Russell'
},
'postIds': [1, 2, 3, 4, 5]
}
}
print(test(users, ['Carla ', 'name', 'last']))
print(test(users, ['Carla ', 'postIds', 1]))
Sample Output:
Russell 2
Flowchart:

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Previous: Write a Python program to map the values of a given list to a dictionary using a function, where the key-value pairs consist of the original value as the key and the result of the function as the value.
Next: Write a Python program to invert a dictionary with unique hashable values.
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Python: Tips of the Day
Decapitalizes the first letter of a string:
Example:
def tips_decapitalize(s, upper_rest=False): return s[:1].lower() + (s[1:].upper() if upper_rest else s[1:]) print(tips_decapitalize('PythonTips')) print(tips_decapitalize('PythonTips', True))
Output:
pythonTips pYTHONTIPS
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