Python: Create a dictionary of keys x, y, and z

Last update on June 28 2025 12:41:01 (UTC/GMT +8 hours)

40. Create Dictionary with Keys 'x', 'y', 'z' and List Values

Write a Python program to create a dictionary of keys x, y, and z where each key has as value a list from 11-20, 21-30, and 31-40 respectively. Access the fifth value of each key from the dictionary.

Visual Presentation:

Sample Solution:

Python Code:

# Import the 'pprint' function from the 'pprint' module to pretty-print dictionaries.
from pprint import pprint

# Create a dictionary 'dict_nums' with keys 'x', 'y', and 'z', and lists of numbers as values.
dict_nums = dict(x=list(range(11, 20)), y=list(range(21, 30)), z=list(range(31, 40)))

# Pretty-print the 'dict_nums' dictionary to improve readability.
pprint(dict_nums)

# Print the value at the 4th index of the 'x', 'y', and 'z' lists in 'dict_nums'.
print(dict_nums["x"][4])
print(dict_nums["y"][4])
print(dict_nums["z"][4])

# Iterate through the key-value pairs in 'dict_nums' and print the key and its associated value.
for k, v in dict_nums.items():
    print(k, "has value", v)

Sample Output:

{'x': [11, 12, 13, 14, 15, 16, 17, 18, 19],
 'y': [21, 22, 23, 24, 25, 26, 27, 28, 29],
 'z': [31, 32, 33, 34, 35, 36, 37, 38, 39]}
15
25
35
x has value [11, 12, 13, 14, 15, 16, 17, 18, 19]
y has value [21, 22, 23, 24, 25, 26, 27, 28, 29]
z has value [31, 32, 33, 34, 35, 36, 37, 38, 39]

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to create a dictionary with keys 'x', 'y', and 'z' and assign each key a list of consecutive integers within specified ranges.
• Write a Python program to generate a dictionary where key 'x' contains numbers 11–20, 'y' contains 21–30, and 'z' contains 31–40, then print the fifth element of each list.
• Write a Python program to dynamically generate a dictionary with keys based on user input and list values as ranges, then access a specific index from each list.
• Write a Python program to implement a function that builds a nested dictionary with keys 'x', 'y', 'z' mapping to lists of numbers and returns selected elements from each.

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