> # Handle a matched regex > if (match := pattern.search(data)) is not None: > ... > > # A more explicit alternative to the 2-arg form of iter() invocation > while (value := read_next_item()) is not None: > ... > > # Share a subexpression between a comprehension filter clause and its > output > filtered_data = [y for x in data if (y := f(x)) is not None]
What do you think of adding the variant without the new ":=" syntax? It would help to see the benefit of the new ":=" syntax, and help to compare the two syntaxes. if: if (match := pattern.search(data)) is not None: ... vs match = pattern.search(data) if match is not None: ... while: while (value := read_next_item()) is not None: ... vs while True: value = read_next_item() if value is None: break ... list-comprehension: filtered_data = [y for x in data if (y := f(x)) is not None] vs filtered_data = [f(x) for x in data] filtered_data = [x for x in filtered_data if x is not None] Victor _______________________________________________ Python-Dev mailing list [email protected] https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com