Tuples are like lists but immutable: (1, 2, 3). Use tuple unpacking: a, b = (1, 2). Tuples are hashable so they can be dictionary keys. Use them for fixed data that should not change after creation.
Tuples — Immutable Lists
point = (3, 7)
x, y = point # unpacking
print(x, y) # 3 7
coords = (1.5, 2.8, -3.0)
print(coords[0]) # 1.5
# coords[0] = 5 # TypeError — immutable!
# Tuple with one item
singleton = (42,) # note the comma