1
2

my_list = [1, 2, 3, 4, 5]
getitem(my_list, 2)  # Output: 3

1
2

my_list = [1, 2, 3, 4, 5]
5 in my_list  # Output: True

1
2

for i in my_list:
    print(i)

1
2
3

range(5)  # Output: range(0, 5)
range(1, 5)  # Output: range(1, 5)
range(1, 10, 2)  # Output: range(1, 10, 2)

1
2
3

_ = 1  # 单个下划线
__ = 2  # 双下划线
__my_var = 3  # 双下划线开头的变量名

1

[x for x in range(5) if x % 2 == 0]