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pythondictionarylookup

How can I add new keys to a dictionary?

How do I add a new key to an existing dictionary? It doesn't have an .add() method.

Solution

  • You create a new key/value pair on a dictionary by assigning a value to that key

    d = {'key': 'value'}
print(d)  # {'key': 'value'}

d['mynewkey'] = 'mynewvalue'

print(d)  # {'key': 'value', 'mynewkey': 'mynewvalue'}

    If the key doesn't exist, it's added and points to that value. If it exists, the current value it points to is overwritten.