Passing functions which have multiple return values as arguments in Python

Question

So, Python functions can return multiple values. It struck me that it would be convenient (though a bit less readable) if the following were possible.

a = [[         


        

Answer 1

Try this:

>>> def cord():
...     return (1, 1)
...
>>> def printa(y, x):
...     print a[y][x]
...
>>> a=[[1,2],[3,4]]
>>> printa(*cord())
4

The star basically says "use the elements of this collection as positional arguments." You can do the same with a dict for keyword arguments using two stars:

>>> a = {'a' : 2, 'b' : 3}
>>> def foo(a, b):
...    print a, b
...
>>> foo(**a)
2 3