"""

列表生成式



"""

"""for循环举例"""

"""打印0到90,1,2,3,4,5,6,7,8,9,(结束位置)默认开始位置为0"""

for i in range(10):

    print(i, end=",")

print()

"""打印5到105,6,7,8,9,10,(开始位置，结束位置)"""

for j in range(5, 11):

    print(j, end=",")

print()

"""打印1到20的所有的偶数0,2,4,6,8,10,12,14,16,18,20,(开始位置，结束位置，步频)"""

for k in range(0, 21, 2):

    print(k, end=",")

print()

"""

自动生成0到10的列表

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

for i in range(10) 控制执行的次数，然后将i值打印

"""

a = [i for i in range(10)]

print(a)

"""

自动生成1到20 之间所有奇数（注意if中非0表示真）的列表

for i in range控制输出的范围和次数如果if i%2 为真则打印，然后将i输出

[1, 3, 5, 7, 9, 11, 13, 15, 17, 19]

"""

b = [i for i in range(0, 20) if i % 2]

print(b)

"""

[0, 0, 1, 1, 2, 2]

类似下面的流程：

arr=[]

for i in rang(3):

    for  j in rang(2):

        arr.append(i)

i 每次循环一次，都执行for j in range(2) 故一共打印了 3*2=6次

[0, 0, 1, 1, 2, 2]

"""



c = [i for i in range(3) for j in range(2)]

print(c)

"""

打印元组

[(0, 0), (0, 1), (1, 0), (1, 1), (2, 0), (2, 1)]



"""

d = [(i, j) for i in range(3) for j in range(2)]

print(d)



"""

打印元组加强

[(0, 0, 0), (0, 0, 1), (0, 0, 2), (0, 1, 0), (0, 1, 1), (0, 1, 2), (1, 0, 0), (1, 0, 1), (1, 0, 2), (1, 1, 0), (1, 1, 1), (1, 1, 2), (2, 0, 0), (2, 0, 1), (2, 0, 2), (2, 1, 0), (2, 1, 1), (2, 1, 2)]



"""

e = [(i, j, k) for i in range(3) for j in range(2) for k in range(3)]

print(e)

奈斯