python-open/tianchenxing_main.py

if __name__ == '__main__':
    str = "www.moe.gov.cn"

print("例3：")
print(str[0])
print(str[0:3])
print(str[-3:])
print(len(str))
print(str.replace('.', '-'))

print("\n例2：")
money = int(input('请输入你的钱数：'))
fifty = money // 50  # 整除50
five = money % 50 // 5  # 整除50后的余数再整除5
one = money % 50 % 5 // 1  # 整除50后的余数再整除5后的余数再整除1
print('换钱方案：' + repr(fifty) + '张50元，' + repr(five) + '张5元钱，和' + repr(one) + '张1元钱')