Re: If a dictionary key has a Python list as its value!

Varuna Seneviratna <varunaseneviratna@gmail.com> wrote or quoted:

If a dictionary key has a Python list as its value, you can read the values
one by one in the list using a for-loop like in the following.
d = {k: [1,2,3]}

for v in d[k]:
     print(v)

No tutorial describes this, why?
What is the Python explanation for this behaviour?

  This is explained by extensionality: To find the behavior of   "for v in ...", the only thing one needs to know about "..."
  is its value. You could just as well have written:
l = d[ k ]
for v in l:
  . l can be any iterable. It does not matter where it came from.
  It does not matter that it cam from a dictionary. There are thousand
  places where it could have come from, and no tutorial can name them
  all.