How can I merge two dictionaries in Python?

How can I merge two dictionaries in Python?

You can merge two dictionaries using the update() method or the ** unpacking operator in Python 3.5 and later.

Can you show me an example using both methods?

Sure! Using update():

dict1 = {'a': 1, 'b': 2}
dict2 = {'b': 3, 'c': 4}
dict1.update(dict2)
print(dict1)  # Output: {'a': 1, 'b': 3, 'c': 4}

Using ** unpacking:

dict1 = {'a': 1, 'b': 2}
dict2 = {'b': 3, 'c': 4}
dict3 = {**dict1, **dict2}
print(dict3)  # Output: {'a': 1, 'b': 3, 'c': 4}

What happens if there are duplicate keys?

In both methods, the values from the second dictionary will overwrite the values from the first dictionary for any duplicate keys.