auto save

a.py

+def new_input():
+    total = []
+    while True:
+        unit= input("请输入(q退出)：")
+        if unit == 'q':
+            break
+        else:
+            try:
+                unit=int(unit)
+            except:
+                print("请重新输入一个数字")
+            else: 
+                total.append(unit)
+            print("-"*30)
+    return total
+
+def sum(money):
+    count=0
+    for i in money:
+        count=count+i
+    return count
+
+#price=new_input()
+pay=sum(new_input())
+print("您一共消费了"+str(pay)+"元，扫码还是现金?")
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