Question

How to combine 2 dictionaries into a third dictionary in Python

Answer 1

dict1 = {1: "aaa", 2: "bbb"}
dict2 = {3: "ccc", 2: "XYZ", 4: "ddd"}  # Note: key 2 overlaps

combined = {**dict1, **dict2}

print(combined)



'''
run:

{1: 'aaa', 2: 'XYZ', 3: 'ccc', 4: 'ddd'}

'''

 

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Answer 2

dict1 = {1: "aaa", 2: "bbb"}
dict2 = {3: "ccc", 2: "XYZ", 4: "ddd"}  # Note: key 2 overlaps

combined = dict1.copy()
combined.update(dict2)

print(combined)



'''
run:

{1: 'aaa', 2: 'XYZ', 3: 'ccc', 4: 'ddd'}

'''

 

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Answer 3

dict1 = {1: "aaa", 2: "bbb"}
dict2 = {3: "ccc", 2: "XYZ", 4: "ddd"}  # Note: key 2 overlaps

combined = dict1.copy()
for key, value in dict2.items():
    if key in combined:
        combined[key] += ", " + value  
    else:
        combined[key] = value


print(combined)



'''
run:

{1: 'aaa', 2: 'bbb, XYZ', 3: 'ccc', 4: 'ddd'}

'''

 

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