In: ```python a = 1, ``` Out: ```python a = 1 ``` The trailing comma is necessary for single-element tuples in Python, with out without the parens (i.e. `(1,)`, not `(1)`).
In:
Out:
The trailing comma is necessary for single-element tuples in Python, with out without the parens (i.e.
(1,), not(1)).