#!python
>>> def foo(a, b, (c, d)): pass
...
>>> foo(
┌─────────────────────────────────────────────────────────┐
│ foo: (a, b, ['c', 'd']) │
└─────────────────────────────────────────────────────────┘
The ['c', 'd'] seems rather strange to me. I would have expected to see foo: (a, b, (c, d)) there.