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Question 75

Question

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

Hints

Use random.randrange() to a random integer in a given range.

Solution:

import random
print random.randrange(7,16)

Question 76

Question

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

Hints

Use zlib.compress() and zlib.decompress() to compress and decompress a string.

Solution:

import zlib
s = 'hello world!hello world!hello world!hello world!'
t = zlib.compress(s)
print t
print zlib.decompress(t)
'''Solution by: anas1434 
'''
s = 'hello world!hello world!hello world!hello world!'
# In Python 3 zlib.compress() accepts only DataType <bytes>
y = bytes(s, 'utf-8')
x = zlib.compress(y)
print(x)
print(zlib.decompress(x))

Question 77

Question

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

Hints

Use timeit() function to measure the running time.

Main author's Solution: Python 2

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

My Solution: Python 3

import datetime

before = datetime.datetime.now()
for i in range(100):
    x = 1 + 1
after = datetime.datetime.now()
execution_time = after - before
print(execution_time.microseconds)

OR

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

Question

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

Hints

Use shuffle() function to shuffle a list.

Main author's Solution: Python 2

from random import shuffle
li = [3,6,7,8]
shuffle(li)
print li

My Solution: Python 3

import random

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

OR

import random

# shuffle with a chosen seed
lst = [3,6,7,8]
seed = 7
random.Random(seed).shuffle(lst)
print(lst)

Question 79

Question

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"].

Hints

Use list[index] notation to get a element from a list.

Main author's Solution: Python 2

subjects=["I", "You"]
verbs=["Play", "Love"]
objects=["Hockey","Football"]
for i in range(len(subjects)):
    for j in range(len(verbs)):
        for k in range(len(objects)):
            sentence = "%s %s %s." % (subjects[i], verbs[j], objects[k])
            print sentence

My Solution: Python 3

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))
'''Solution by: popomaticbubble
'''
import itertools
subject = ["I", "You"]
verb = ["Play", "Love"]
objects = ["Hockey","Football"]

sentence = [subject, verb, objects]
n = list(itertools.product(*sentence))
for i in n: 
    print(i)
'''Solution by: lcastrooliveira
'''
from itertools import product

def question_79():
    subject = ["I", "You"]
    verb = ["Play", "Love"]
    object = ["Hockey", "Football"]
    prod = [p for p in product(range(2), repeat=3)]
    for combination in prod:
        print(f'{subject[combination[0]]} {verb[combination[1]]} {object[combination[2]]}')

question_79()

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