x = 1
assert x == 1
x = 1, 2, 3
assert x == (1, 2, 3)
x, y = 1, 2
assert x == 1
assert y == 2
x, y = (y, x)
assert x == 2
assert y == 1
((x, y), z) = ((1, 2), 3)
assert (x, y, z) == (1, 2, 3)
q = (1, 2, 3)
(x, y, z) = q
assert y == q[1]
x = (a, b, c) = y = q
assert (a, b, c) == q
assert x == q
assert y == q
a, *b = q
print(a)
print(b)
assert a == 1
assert b == [2, 3]
a, *b, c, d = q
print(a)
print(b)
assert a == 1
assert b == []
assert c == 2
assert d == 3
a, = [1]
assert a == 1
def g():
yield 1337
yield 42
a, b = g()
assert a == 1337
assert b == 42