#testmode:repl

# iadd
l = (1,)
l += 2
l += (3, 4)
l

# iadd to itself
a = (1,2)
b = (3,4)
a + b
a
b
a += b
a
b

# add
l = (1,)
l + (2, 3)
l

#---

#(1, 2, 3, 4)

#(1, 2, 3, 4)
#(1, 2)
#(3, 4)
#(1, 2, 3, 4)
#(3, 4)

#(1, 2, 3)
#(1, )