《Python编程》第四章部分课后练习题

#4-3 数到20：

代码：

#4-3 数到20
for num in range(1, 21):
print(num)

输出：pass

#4-5 计算1~1 000 000的总和：

代码：

#4-5 计算1~1 000 000的总和
import time
nums = list(range(1, 1000001))
print(min(nums))
print(max(nums))
time1 = time.clock()
print(sum(nums))
time2 = time.clock()
message = 'It costs ' + str(time2 - time1) + 's'
print (message)

输出：

1
1000000
500000500000
It costs 0.1980368107604632s

#4-6 奇数：

代码：

#4-6 奇数
nums = list(range(1, 20, 2))
for num in nums:
print(num)

输出：pass

#4-7 3的倍数：

代码：

#4-7 3的倍数
nums = list(i*3 for i in range(1, 11))
for num in nums:
print(num)

输出：pass

#4-8 立方：

代码：

#4-8 立方
nums = list(i**3 for i in range(1, 11))
for num in nums:
print(num)

输出：pass

#4-9 立方解析：

代码：

#4-9 立方解析
nums = list(i**3 for i in range(1, 11))
print(num)

输出：

[1, 8, 27, 64, 125, 216, 343, 512, 729, 1000]

#4-10 切片：

#4-10 切片
nums = list(i**3 for i in range(1, 11))
print(nums)
message = 'nThe first three items in the list are:'
print(message)
print(nums[:3])
message = 'nThree items from the middle of the list are:'
print(message)
print(nums[3:6])
message = 'nThe last three items in the list are:'
print(message)
print(nums[-3:])

输出：

[1, 8, 27, 64, 125, 216, 343, 512, 729, 1000]
The first three items in the list are:
[1, 8, 27]
Three items from the middle of the list are:
[64, 125, 216]
The last three items in the list are:
[512, 729, 1000]

最后

以上就是狂野毛衣最近收集整理的关于《Python编程》第四章部分课后练习题的全部内容，更多相关《Python编程》第四章部分课后练习题内容请搜索靠谱客的其他文章。