human
I wrote the below code

    def pickle_roundtrip(c):
        return pickle.loads(pickle.dumps(c))
    def init_from_class(c):
        return c.__class__(c)
    attrs = ('name', 'unit', 'dtype', 'format', 'description', 'meta')
    for colname in ('i', 'm'):
        m = mixin_cols[colname]
        m.info.name = colname
        m.info.format = '{0}'
        m.info.description = 'd'
        m.info.meta = {'a': 1}
        for func in (copy.copy, copy.deepcopy, pickle_roundtrip, init_from_class):
            m2 = func(m)
            for attr in attrs:
                assert (getattr(m2.info, attr) == getattr(m.info, attr))

What's a good function header?
 Here's a good function header?
assistant
#Here's a good function header.

def test_info_preserved_pickle_copy_init(mixin_cols):