Unpacking arguments: only named arguments may follow *expression

Question

The following works beautifully in Python:

def f(x,y,z): return [x,y,z]

a=[1,2]

f(3,*a)

The elements of a get unpacked as if

Answer 1

Thanks to the PEP 448 - Additional Unpacking Generalizations,

f(*a, 3)

is now accepted syntax starting from Python 3.5. Likewise you can use the double-star ** for keyword argument unpacking anywhere and either one can be used multiple times.