【HW】书本10-1至10-13的选题,代码及输出

10-7,加法计算器
while 1:
    try:
        x = input('write down a number')
        if x == 'q':
            break
        y = input('write dow another number')
        if y == 'q':
            break
        print('the sum is ' + str(int(x) + int(y)))
    except ValueError:
        print('sorry, please write down a number.')

【HW】书本10-1至10-13的选题,代码及输出_第1张图片

10-9,沉默的猫和狗
file_name = 'cats.txt'
try:
    print("cats' name:")
    with open(file_name) as file_object:
        for line in file_object:
            print(line.rstrip())
except FileNotFoundError:
    print('sorry, there is not file ' + file_name)
file_name = 'dogs.txt'
try:
    print("dogs' name:")
    with open(file_name) as file_object:
        for line in file_object:
            print(line.rstrip())
except FileNotFoundError:
    pass
【HW】书本10-1至10-13的选题,代码及输出_第2张图片
10-12,记住喜欢的数字

 
  

import json file_name = 'save.json' try: with open(file_name) as file_object: num = json.load(file_object) print("I know your favorite number! It's " + str(num)) except FileNotFoundError: number = input("What's your favorite number?") with open(file_name, 'w') as file_object: json.dump(number, file_object)



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