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Python: Extract values from a given dictionaries and create a list of lists from those values

Python dictionary: Exercise-62 with Solution

Write a Python program to extract values from a given dictionaries and create a list of lists from those values.

Sample Solution:

Python Code:

def test(dictt,keys):
    return [list(d[k] for k in keys) for d in dictt] 

students = [
        {'student_id': 1, 'name': 'Jean Castro', 'class': 'V'}, 
        {'student_id': 2, 'name': 'Lula Powell', 'class': 'V'},
        {'student_id': 3, 'name': 'Brian Howell', 'class': 'VI'}, 
        {'student_id': 4, 'name': 'Lynne Foster', 'class': 'VI'}, 
        {'student_id': 5, 'name': 'Zachary Simon', 'class': 'VII'}
        ]

print("\nOriginal Dictionary:")
print(students)
print("\nExtract values from the said dictionarie and create a list of lists using those values:")
print("\n",test(students,('student_id', 'name', 'class')))
print("\n",test(students,('student_id', 'name')))
print("\n",test(students,('name', 'class')))

Sample Output:

Original Dictionary:
[{'student_id': 1, 'name': 'Jean Castro', 'class': 'V'}, {'student_id': 2, 'name': 'Lula Powell', 'class': 'V'}, {'student_id': 3, 'name': 'Brian Howell', 'class': 'VI'}, {'student_id': 4, 'name': 'Lynne Foster', 'class': 'VI'}, {'student_id': 5, 'name': 'Zachary Simon', 'class': 'VII'}]

Extract values from the said dictionarie and create a list of lists using those values:

 [[1, 'Jean Castro', 'V'], [2, 'Lula Powell', 'V'], [3, 'Brian Howell', 'VI'], [4, 'Lynne Foster', 'VI'], [5, 'Zachary Simon', 'VII']]

 [[1, 'Jean Castro'], [2, 'Lula Powell'], [3, 'Brian Howell'], [4, 'Lynne Foster'], [5, 'Zachary Simon']]

 [['Jean Castro', 'V'], ['Lula Powell', 'V'], ['Brian Howell', 'VI'], ['Lynne Foster', 'VI'], ['Zachary Simon', 'VII']]

Pictorial Presentation:

Python Dictionary: Extract values from a given dictionaries and create a list of lists from those values.

Flowchart:

Flowchart: Extract values from a given dictionaries and create a list of lists from those values.

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Next: Write a Python program to convert a given list of lists to a dictionary.

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Free up Memory:

  • Manual garbage collection can be performed on timely or event based mechanism.
import gc
collected_objects = gc.collect()