Python: Find the length of a given dictionary values

Last update on June 28 2025 12:39:43 (UTC/GMT +8 hours)

53. Find Length of a Dictionary

Write a Python program to find the length of a dictionary of values.

Visual Presentation:

Sample Solution:

Python Code:

# Define a function 'test' that calculates the length of the values in a dictionary and returns a new dictionary with values as keys and their lengths as values.
def test(dictt):
    result = {}
    for val in dictt.values():
        # Calculate the length of each value and store it as a key-value pair in the 'result' dictionary.
        result[val] = len(val)
    return result

# Create a dictionary 'color_dict' with integer keys and color 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 original dictionary.
print("\nOriginal Dictionary:")
print(color_dict)

# Print a message indicating the intention to calculate the length of dictionary values.
print("Length of dictionary values:")

# Call the 'test' function to calculate the length of values in the dictionary and print the result.
print(test(color_dict))

# Create a dictionary 'color_dict' with string keys and 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 original dictionary.
print("\nOriginal Dictionary:")
print(color_dict)

# Print a message indicating the intention to calculate the length of dictionary values.
print("Length of dictionary values:")

# Call the 'test' function to calculate the length of values in the dictionary and print the result.
print(test(color_dict))

Sample Output:

Original Dictionary:
{1: 'red', 2: 'green', 3: 'black', 4: 'white', 5: 'black'}
Length of dictionary values:
{'red': 3, 'green': 5, 'black': 5, 'white': 5}

Original Dictionary:
{'1': 'Austin Little', '2': 'Natasha Howard', '3': 'Alfred Mullins', '4': 'Jamie Rowe'}
Length of dictionary values:
{'Austin Little': 13, 'Natasha Howard': 14, 'Alfred Mullins': 14, 'Jamie Rowe': 10}

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to determine the number of key-value pairs in a dictionary using the len() function.
• Write a Python program to iterate through a dictionary and manually count its items.
• Write a Python program to implement a recursive function that calculates the length of a dictionary.
• Write a Python program to use list comprehension on dictionary keys to compute the total count of entries.

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