[점프 투 파이썬] - 5장 연습문제

Q1.

class Calculator:
    def __init__(self):
        self.value = 0

    def add(self, val):
        self.value += val

class UpgradeCalculator(Calculator):
    def minus(self, val):
        self.value -= val

cal = UpgradeCalculator()
cal.add(10)
cal.minus(7)

print(cal.value)

 

 

Q2.

class MaxLimitCalculator(Calculator):
    def add(self, val):
        self.value += val
        if self.value > 100:
            self.value = 100

cal = MaxLimitCalculator()
cal.add(50)
cal.add(60)

print(cal.value)

 

 

Q3.

1. False - abs(-3)-3은 0이기 때문

2. True - chr(ord('a'))는 a이기 때문

 

 

 

Q4.

print(list(filter(lambda x: x>0, [1, -2, 3, -5, 8, -3])))

 

 

Q5.

print(int('0xea', 16))

 

 

Q6.

print(list(map(lambda x: x*3, [1, 2, 3, 4])))

 

 

Q7.

list = [-8, 2, 7, 5, -3, 5, 0, 1]
print(max(list) + min(list))

 

 

Q8.

print(round(17/3, 4))

 

 

Q9.

import sys

numbers = sys.argv[1:]

result = 0

for number in numbers:
    result += int(number)
    
print(number)

 

 

Q10.

import os

os.chdir("c:/doit")
result = os.popen("dir")

print(result.read())

 

 

Q11.

import glob
glob.glob("c:/doit/*.py")

 

 

Q12.

import time
time.strftime("%Y/%m/%d %H:%M:%S")

 

 

Q13.

import random

result = []

while len(result) < 6:
    num = random.randint(1, 45)
    if num not in result:
        result.append(num)

print(result)