Steven Bethard wrote: > I don't do much with SQL/databases stuff, but if you really know the > result will be a single row, you can take advantage of tuple unpacking > and do something like: > > row, = obj.ExecSQLQuery(sql, args) > > or > > [row] = obj.ExecSQLQuery(sql, args) > > This has the advantage that you'll get a ValueError if you happen to be > wrong (and there are more or fewer values in the generator). > > >>> def g(n): > ... for i in range(n): > ... yield i > ... > >>> x, = g(1) > >>> x > 0 > >>> x, = g(2) > Traceback (most recent call last): > File "<interactive input>", line 1, in ? > ValueError: too many values to unpack > >>> x, = g(0) > Traceback (most recent call last): > File "<interactive input>", line 1, in ? > ValueError: need more than 0 values to unpack > > Steve
Wow, good advice. One question, how is the generator class implemented so that if assigned to a tuple/list, it knows what to do? Is it possible to overload the assignment operator kinda like in C++? Thank you all who replied to the original post, it was very helpful. -- http://mail.python.org/mailman/listinfo/python-list
