How do I merge two dictionaries in a single expression in Python?
To merge two dictionaries in a single expression you can use the dictionary unpacking operator **. This creates a new dictionary and unpacks all key-value pairs into the new dictionary. Let’s look at the example below.
x = {'firstname': 'John'}
y = {'lastname': 'Doe'}
z = {**x,**y}
This will create a new dictionary z with the value of {'firstname': 'John', 'lastname': 'Doe'}.
Using OR operator
If you are using python 3.9.0 or greater, you can also use the bitwise OR operator also known as a pipe operator.
z = x | y
The result will be the same.
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