周末任务 - 列表

wufei123 2025-01-05 阅读:36 评论:0

任务：1 s =“a4k3b2” 1) 编写一个程序来获取输出 'abbbbklllbcc' s = "a4k3b2" output = "" i = 0 while i < len(s)...

任务：1
s =“a4k3b2”

1) 编写一个程序来获取输出 'abbbbklllbcc'

PHP

s = "a4k3b2"
output = ""
i = 0

while i < len(s):
    first = s[i]  
    second =s[i + 1] 
    if second.isdigit():
        alpha=chr(ord(first)+1)
        output=output+ first+ (int(second)*alpha)
        i+=2

print(output)

输出：

abbbbklllbcc

2) 编写一个程序来获取输出 'aaaaakkkkbbb'

PHP

s = "a4k3b2"
output = ""
i = 0

while i < len(s):
    first = s[i]  
    second =s[i + 1] 
    if second.isdigit():
        output=output+ first+ (int(second)*first)
        i+=2

print(output)

输出：

aaaaakkkbbbb

任务：2

矩阵 = [[10,20,30], [40,50,60], [70,80,90]]

使用综合 for 和普通 for 循环将给定矩阵加入到单个列表中。
方法：1(使用普通的for循环)

PHP

matrix = [[10,20,30], [40,50,60], [70,80,90]]
output=[]

for i in matrix:
    for j in i:
        output.append(j)
print(output)

方法：2（使用综合for循环）

PHP

matrix = [[10, 20, 30], [40, 50, 60], [70, 80, 90]]

output = [j for i in matrix for j in i]
print(output)

输出：

PHP

[10, 20, 30, 40, 50, 60, 70, 80, 90]

任务：3
l = ['abc','def', 'ghi', 'jkl']
获取输出：['abc', 'def', 'ghi', 'jkl']

PHP

l = ['abc', 'def', 'ghi', 'jkl']

output = [] 
for i, alpha in enumerate(l):
    if i % 2 != 0:
        output.append(alpha.casefold())
    else:
        output.append(alpha)
print(output)