Feature or enhancement

Proposal:

This is great:

>>> x, y, z = 1, 2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: not enough values to unpack (expected 3, got 2)

But here, it doesn't seem to tell how many values were found:

>>> x, y, z = 1, 2, 3, 4
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: too many values to unpack (expected 3)

I was hoping to see (expected 3, got 4) here. The eval loop also seems to have access to an entire PyList object at this point, so getting its length for the error message should not cause any changes in behaviour.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• gh-122239: Add actual count in unbalanced unpacking error message when possible #122244