Python: Concatenate following dictionaries to create a new one

Last update on June 28 2025 12:41:30 (UTC/GMT +8 hours)

3. Concatenate Dictionaries

Write a Python script to concatenate the following dictionaries to create a new one.

Visual Presentation:

Sample Solution:

Python Code:

# Create three dictionaries 'dic1', 'dic2', and 'dic3' with key-value pairs.
dic1 = {1: 10, 2: 20}
dic2 = {3: 30, 4: 40}
dic3 = {5: 50, 6: 60}

# Create an empty dictionary 'dic4' that will store the combined key-value pairs from 'dic1', 'dic2', and 'dic3'.
dic4 = {}

# Iterate through each dictionary ('dic1', 'dic2', and 'dic3') using a loop.
for d in (dic1, dic2, dic3):
    # Update 'dic4' by adding the key-value pairs from the current dictionary 'd'.
    dic4.update(d)

# Print the combined dictionary 'dic4' containing all the key-value pairs from 'dic1', 'dic2', and 'dic3'.
print(dic4) 

Sample Output:

{1: 10, 2: 20, 3: 30, 4: 40, 5: 50, 6: 60}

For more Practice: Solve these Related Problems:

• Write a Python script to merge three dictionaries into one using dictionary unpacking.
• Write a Python script to combine multiple dictionaries and resolve key conflicts by summing their values.
• Write a Python script to merge two dictionaries recursively when values are also dictionaries.
• Write a Python script to implement dictionary concatenation without using the built‐in update() method.

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