New submission from R. David Murray: Consider this code snippet, simplified from a real application:
def display(self, *columns) getter = attrgetter(*columns) toprint = [[str(x) for x in getter(row)] for row in self._rows] This works great...as long as there are two or more columns to print. If there is only one column, it bombs because the getter returns a value instead of a tuple. This would not be a problem in and of itself, but there is no way to tell attrgetter that I want a tuple even if there is only one value. I believe it would be backward compatible to allow: attrgetter(['a']) itemgetter(['a', 'b']) to return a tuple, since a list cannot be an attribute name. The same would apply to itemgetter, since a list cannot be a dictionary key. ---------- components: Library (Lib) messages: 175412 nosy: r.david.murray priority: normal severity: normal stage: needs patch status: open title: Allow operator 'getter' methods to take a list and return a tuple type: enhancement versions: Python 3.4 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue16457> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com