How do I update values in a Python dictionary?

How do I update values in a Python dictionary?

You can update a value in a dictionary by using the key. For example, if you have my_dict = {'a': 1, 'b': 2}, you can update the value of 'a' like this: my_dict['a'] = 3.

What if the key doesn't exist?

If the key doesn't exist, you can add a new key-value pair. For example, my_dict['c'] = 4 will add 'c' with a value of 4.

Can I update multiple values at once?

Yes, you can use the update() method. For example, my_dict.update({'a': 5, 'b': 6}) will update both 'a' and 'b'.

What happens if I use a non-existent key with update()?

If you use a non-existent key with update(), it will simply add that key with the specified value.