[점프 투 파이썬] - 파이썬 초보 탈출 (6 ~ 10)

Q6.

나의 코드 : 

numStr = input()
num = numStr.split(',')
total = 0

for i in num:
    total += int(i);
print(total)

 

정답 : 

user_input = input("숫자를 입력하세요: ")
numbers = user_input.split(",")
total = 0
for n in numbers:
    total += int(n)
print(total)

 

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Q7.

나의 코드 : 

n = int(input("구구단을 출력할 숫자를 입력하세요(2~9): "))

for i in range(1, 10):
    print(n * i, end=" ")

 

정답 : 

user_input = input("구구단을 출력할 숫자를 입력하세요(2~9):")
dan = int(user_input)
for i in range(1, 10):
    print(i*dan, end=' ')

 

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Q8.

나의 코드 : 

f = open("abc.txt", 'r')
str = f.readlines()
f.close()
str.reverse()
f = open("abc.txt", 'w')
for n in str:
    n = n.strip()
    f.write(n)
    f.write('\n')
f.close()

 

정답 : 

f = open('abc1.txt', 'r')
lines = f.readlines()
f.close()

lines.reverse()

f = open('abc1.txt', 'w')
for line in lines:
    line = line.strip()
    f.write(line)
    f.write('\n')
f.close()

 

abc.txt 결과 : 

EEE
DDD
CCC
BBB
AAA

 

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Q9.

나의 코드 : 

total = 0

f = open("sample.txt", 'r')
strN = f.readlines()
f.close()
for n in strN:
    tmp = int(n)
    total += tmp

avg = total / 10

f = open("result.txt", 'w')
f.write(str(avg))
f.close()

 

정답 : 

f = open("sample1.txt")
lines = f.readlines()
f.close()

total = 0
for line in lines:
    score = int(line)
    total += score
average = total / len(lines)

f = open("result1.txt", "w")
f.write(str(average))
f.close()

 

sample.txt  : 

70
60
55
75
95
90
80
80
85
100

 

result.txt  : 

79.0

 

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Q10.

나의 코드 : 

class Calculator:
    def __init__(self, arr):
        self.arr = arr

    def sum(self):
        total = 0
        for n in self.arr:
            total += n
        return total

    def avg(self):
        total = 0
        for n in self.arr:
            total += n
        average = total / len(self.arr)
        return average

cal1 = Calculator([1, 2, 3, 4, 5])
print(cal1.sum())
print(cal1.avg())
cal2 = Calculator([6, 7, 8, 9, 10])
print(cal2.sum())
print(cal2.avg())

 

정답 : 

class Calculator:
    def __init__(self, numberList):
        self.numberList = numberList

    def sum(self):
        result = 0
        for num in self.numberList:
            result += num
        return result

    def avg(self):
        total = self.sum()
        return total / len(self.numberList)

cal1 = Calculator([1, 2, 3, 4, 5])
print(cal1.sum())
print(cal1.avg())

cal2 = Calculator([6, 7, 8, 9, 10])
print(cal2.sum())
print(cal2.avg())