python基本语法3.1--list的遍历与修改

li = []
for i in range(20):
    if (i & 2) == 0:
        li.append(i)
print(li)

li = [1] * 10
li[3] = 3
print(li)

li = [i * 2 for i in range(10)]
print(li)

li_2d = [[0] * 3] * 3
print(li_2d)
li_2d[0][0] = 100
print(li_2d)

li_2d = [[0] * 3 for i in range(3)]
li_2d[0][0]= 100
print(li_2d)

s = {x for x in range(10) if x % 2 == 0}
print(s)
d = {x: x % 2 == 0 for x in  range(10)}
print(d)