I have a function to do some thing like LEFT JOIN in SQL, the function use
the itemgetter to get the "ON" and "SELECT" parameters of the two table(list
of list), the problem is that itemgetter may return a value or a tuple of
values, because of the inconsistent return type of itemgetter, I have to
2009/8/17 Simon Forman
> You can use a little helper function to create your itemgetter like this:
>
> def makeItemGetter(indexes):
>I = itemgetter(*indexes)
>if len(indexes) > 1:
>return I
>return lambda thing: (I(thing),)
>
> If indexes contains only one index the itemgette
