How do I work with nested dictionaries in Python?

How do I work with nested dictionaries in Python?

You can create nested dictionaries by defining a dictionary within another dictionary. For example: {'key1': {'subkey1': 'value1'}}.

Can you show me how to access a value in a nested dictionary?

Sure! If you have a dictionary like this: data = {'key1': {'subkey1': 'value1'}}, you can access 'value1' using data['key1']['subkey1'].

What if I want to add a new key-value pair to a nested dictionary?

You can add a new key-value pair by assigning a value to a new key. For example: data['key1']['subkey2'] = 'value2'.

How can I loop through all the keys and values in a nested dictionary?

You can use a nested loop. For example:

for key, subdict in data.items():
    for subkey, value in subdict.items():
        print(key, subkey, value)