How do I add a key-value pair to a Python dictionary?

How do I add a key-value pair to a Python dictionary?

You can add a key-value pair to a dictionary by using the syntax dict[key] = value. For example, my_dict['new_key'] = 'new_value'.

What if the key already exists in the dictionary?

If the key already exists, assigning a new value will overwrite the existing value. For example, my_dict['existing_key'] = 'new_value' will change the value associated with 'existing_key'.

Can I add multiple key-value pairs at once?

Yes, you can use the update() method to add multiple key-value pairs. For example, my_dict.update({'key1': 'value1', 'key2': 'value2'}).

What happens if I try to add a key that is not a string?

In Python, dictionary keys can be of any immutable type, such as strings, numbers, or tuples. So you can use integers or tuples as keys too!