[bertiewhykovich]

In Python, the only good language, this could be expressed as:

    [person for person in (Person(name) for name in names) if person.isValid()]

or:

    filter(lambda p: p.isValid, map(Person, names))

or:

    persons = []
    for name in names:
        person = Person(name)
        if person.isValid():
            persons.append(person)

[harpocrates]

So much for "There's Only One Way To Do It". :)

[pjmlp]

That is long gone, specially regarding string formatting.

[bertiewhykovich]

In fairness, the list comprehension would probably be the most "Pythonic" way to do this. The nested iterator might be discouraged (under "explicit is better than implicit," perhaps), so a more Pythonic snippet might look like:

    persons = [Person(name) for name in names]
    valid_persons = [person for person in persons if person.isValid()]

Take this all with a grain of salt, though -- I haven't spent that much time internalizing classical Pythonicness.