Python - printing sorted lists

Question

Hi,

Why does the first printing not output a sorted list, but a None instead? The second printing works.

a = [4,2,3,1]
print (a.sort())
a.sort()
print (a)

Output:
None
[1,2,3,4]

Please help.

Answer 1

Ok, why print(a.sort()) is implicit and print(sorted(a)) is explicit?

Answer 2

If I understand it correctly,
Print + method -> None
Print + function -> value, iterator etc.