Python: Convert a given dictionary into a list of lists

Last update on December 21 2024 07:28:33 (UTC/GMT +8 hours)

Write a Python program to convert a dictionary into a list of lists.

Sample Solution:

Python Code:

# Define a function 'test' that converts a dictionary into a list of lists containing key-value pairs.
def test(dictt):
    # Use the 'items' method to get key-value pairs, then convert it to a list of lists.
    result = list(map(list, dictt.items()))
    return result    

# Create a dictionary 'color_dict' with numeric keys and corresponding color names as values.
color_dict = {1 : 'red', 2 : 'green', 3 : 'black', 4 : 'white', 5 : 'black'}

# Print a message indicating the start of the code section and the dictionary being processed.
print("\nOriginal Dictionary:")
print(color_dict)

# Call the 'test' function to convert the dictionary into a list of lists and print the result.
print("Convert the said dictionary into a list of lists:")
print(test(color_dict))

# Create another dictionary 'color_dict' with string keys and corresponding names as values.
color_dict = {'1' : 'Austin Little', '2' : 'Natasha Howard', '3' : 'Alfred Mullins', '4' : 'Jamie Rowe'}

# Print a message indicating the start of the code section and the new dictionary being processed.
print("\nOriginal Dictionary:")
print(color_dict)

# Call the 'test' function to convert the dictionary into a list of lists and print the result.
print("Convert the said dictionary into a list of lists:")
print(test(color_dict)) 

Sample Output:

Original Dictionary:
{1: 'red', 2: 'green', 3: 'black', 4: 'white', 5: 'black'}
Convert the said dictionary into a list of lists:
[[1, 'red'], [2, 'green'], [3, 'black'], [4, 'white'], [5, 'black']]

Original Dictionary:
{'1': 'Austin Little', '2': 'Natasha Howard', '3': 'Alfred Mullins', '4': 'Jamie Rowe'}
Convert the said dictionary into a list of lists:
[['1', 'Austin Little'], ['2', 'Natasha Howard'], ['3', 'Alfred Mullins'], ['4', 'Jamie Rowe']]

Flowchart:

Python Code Editor:

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