1234567890.py

def n_input():
    t = []
    while True:
        r = input('请输入：')
        if r =='q':
            break
        else:
            try:
                r = int(r)
            except:
                print('请输入一个数字')
            else:
                t.append(r)
            finally:
                print('='*30)
    return t               
def sum(r):
    c = 0
    for i in r:
        c = c + i
    return c
p = n_input()
y = sum(p)
print('你一共消费了' + str(y) + '元')