Python基础练习100题 ( 71~ 80）

Jeff 发布于2019-07-31 10:31 / 826人阅读

摘要：刷题继续昨天和大家分享了题，今天继续来刷题解法一解法二解法一解法一解法二解法一解法一解法二解法一解法一解法二解法一解法二解法一解法二解法三解法一解法二源代码下载这十道题的代码在我的上，如果大家想看一下每道题的输出结果，可以点击以下链接下

刷题继续

昨天和大家分享了61-70题，今天继续来刷71~80题

Question 71:

Please write a program to output a random number, which is divisible by 5 and 7, between 10 and 150 inclusive using random module and list comprehension.

解法一

import random
print (random.choice([i for i in range(10,151) if i%5==0 and i%7==0]))

解法二

import random
resp = [i for i in range(10,151) if i % 35 == 0 ]
print(random.choice(resp))

Question 72:

Please write a program to generate a list with 5 random numbers between 100 and 200 inclusive.

解法一

import random
resp = random.sample(range(100,201),5)
print(resp)

Question 73:

Please write a program to randomly generate a list with 5 even numbers between 100 and 200 inclusive.

解法一

import random
numbers = random.sample(range(100,201,2),5)
print(numbers)

解法二

import random
print (random.sample([i for i in range(100,201) if i%2==0], 5))

Question 74:

Please write a program to randomly generate a list with 5 numbers, which are divisible by 5 and 7 , between 1 and 1000 inclusive.

解法一

import random
lst = [i for i in range(1,1001) if i%35 == 0]
resp = random.sample(lst,5)
print(resp)

Question 75:

Please write a program to randomly print a integer number between 7 and 15 inclusive.

解法一

import random
number= random.choice([x for x in range(7,16)])
print(number)

解法二

import random
print(random.randrange(7,16))

Question 76:

Please write a program to compress and decompress the string "hello world!hello world!hello world!hello world!".

解法一

import zlib
s = "hello world!hello world!hello world!hello world!".encode()
t = zlib.compress(s)
print(t)
print(zlib.decompress(t))

Question 77:

Please write a program to print the running time of execution of "1+1" for 100 times.

解法一

from timeit import Timer
t = Timer("for i in range(100):1+1")
t.timeit()

解法二

import time
before = time.time()
for i in range(100):
    x = 1 + 1
after = time.time()
execution_time = after - before
print(execution_time)

Question 78:

Please write a program to shuffle and print the list [3,6,7,8].

解法一

import  random  
lst  =  [3,6,7,8]  
random.shuffle(lst)  
print(lst)

解法二

import random
lst = [3,6,7,8]
seed = 7
random.Random(seed).shuffle(lst)
print(lst)

Question 79:

Please write a program to generate all sentences where subject is in ["I", "You"] and verb is in ["Play", "Love"] and the object is in ["Hockey","Football"].

解法一

subjects=["I", "You"]
verbs=["Play", "Love"]
objects=["Hockey","Football"]

res = [[i, j, k] for i in subjects  
                 for j in verbs 
                 for k in objects] 
for x in res:
    print(" ".join(x))

Out:
  
    I Play Hockey 
    I Play Football 
    I Love Hockey 
    I Love Football 
    You Play Hockey 
    You Play Football 
    You Love Hockey 
    You Love Football

解法二

subjects=["I", "You"]
verbs=["Play", "Love"]
objects=["Hockey","Football"]

for sub in subjects:
    for verb in verbs:
        for obj in objects:
            print("{}  {}  {}".format(sub,verb,obj))
Out:
    I Play Hockey 
    I Play Football 
    I Love Hockey 
    I Love Football 
    You Play Hockey 
    You Play Football 
    You Love Hockey 
    You Love Football

解法三

import itertools 

subjects=["I", "You"]
verbs=["Play", "Love"]
objects=["Hockey","Football"]
all_list = [subjects,verbs,objects]

res = list(itertools.product(*all_list)) 
for x in res:
    print(" ".join(x))

Out:
    I Play Hockey 
    I Play Football 
    I Love Hockey 
    I Love Football 
    You Play Hockey 
    You Play Football 
    You Love Hockey 
    You Love Football

Question 80:

Please write a program to print the list after removing even numbers in [5,6,77,45,22,12,24].

解法一

def isEven(n):
    return n%2!=0

li = [5,6,77,45,22,12,24]
lst = list(filter(isEven,li))
print(lst)

解法二

li  =  [5,6,77,45,22,12,24]  lst  =  list(filter(lambda  n:n%2!=0,li))  
print(lst)

源代码下载

这十道题的代码在我的github上，如果大家想看一下每道题的输出结果，可以点击以下链接下载：

Python 71 - 80题

我的运行环境Python 3.6+,如果你用的是Python 2.7版本，绝大多数不同就体现在以下3点：

raw_input()在Python3中是input()

print需要加括号

fstring可以换成.format(),或者%s，%d

谢谢大家，我们下期见！希望各位朋友不要吝啬，把每道题的更高效的解法写在评论里，我们一起进步！！！

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