1# test list.__iadd__ and list.extend (they are equivalent)
2
3l = [1, 2]
4l.extend([])
5print(l)
6
7l.extend([3])
8print(l)
9
10l.extend([4, 5])
11print(l)
12
13l.extend(range(6, 10))
14print(l)
15
16l.extend("abc")
17print(l)
18
19l = [1, 2]
20l += []
21print(l)
22
23l += [3]
24print(l)
25
26l += [4, 5]
27print(l)
28
29l += range(6, 10)
30print(l)
31
32l += "abc"
33print(l)
34