How can I flatten a nested dictionary in Python?

How can I flatten a nested dictionary in Python?

You can flatten a nested dictionary using a recursive function. Would you like to see an example?

Yes, please provide an example.

Here's a simple example:

def flatten_dict(d, parent_key='', sep='_'):
    items = []
    for k, v in d.items():
        new_key = f'{parent_key}{sep}{k}' if parent_key else k
        if isinstance(v, dict):
            items.extend(flatten_dict(v, new_key, sep=sep).items())
        else:
            items.append((new_key, v))
    return dict(items)

This function will flatten a nested dictionary.

What if the dictionary has lists as values?

You can modify the function to handle lists as well. Would you like to see that?