Python pep8, long lines wrap rules, indentation

example.py

def inside():
    # Good. Consistent. You know up front where to put continuation.
    # Also consistently short, no matter how long is `xs = itertools.ifilter`.
    xs = itertools.ifilter(fun, [very_long_name_1, very_long_name_2,
        very_long_name_3, very_long_name4])

    # Bad. Lots of space wasted. Rename 'xs' and you have to reindent everything.
    xs = itertools.ifilter(fun,
                           [very_long_name_1, very_long_name_2,
                            very_long_name_3, very_long_name_4])


class A:
    items = (
        'how',
        'about',
        'this',
    )

I prefer using this type of indentation.