What are some tips for using pattern matching in Python 3.10?

What are some tips for using pattern matching in Python 3.10?

In Python 3.10, pattern matching is a powerful feature. Here are some tips: 1. Use the match statement for cleaner code. 2. Leverage the case clauses to match complex data structures. 3. Remember to use the underscore _ as a wildcard for unmatched patterns.

Can you give an example of pattern matching with a list?

Sure! Here's an example:

match my_list:
    case [1, 2, 3]:
        print('Matched the list [1, 2, 3]!')
    case [1, *rest]:
        print(f'Matched a list starting with 1, rest: {rest}')
    case _:
        print('No match found.')

What about matching dictionaries?

For dictionaries, you can match keys and values like this:

match my_dict:
    case {'key1': value1, 'key2': value2}:
        print(f'Matched with key1: {value1} and key2: {value2}')
    case {'key1': value1}:
        print(f'Matched with key1: {value1}')
    case _:
        print('No match found.')

Are there any performance considerations?

Yes, while pattern matching is powerful, it can be less performant than traditional if-else statements for very complex patterns. Always consider readability and maintainability alongside performance.