How do I update a dictionary in Python?

How do I update a dictionary in Python?

You can update a dictionary in Python using the update() method or by assigning a new value to a key.

Can you show me an example of using the update method?

Sure! Here's an example: my_dict = {'a': 1, 'b': 2}. To update it, use my_dict.update({'b': 3, 'c': 4}), which will change 'b' to 3 and add 'c'.

What if the key doesn't exist in the dictionary?

If the key doesn't exist, the update() method will add it to the dictionary. For example, my_dict.update({'d': 5}) will add 'd' with a value of 5.

Can I update multiple keys at once?

Yes, you can update multiple keys at once by passing a dictionary to the update() method, like this: my_dict.update({'a': 10, 'b': 20}).