auto save

aa.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)
+            finally:
+                print("=====================")
+    return total
+
+def sum(money):
+    count = 0
+    for i in money:
+        count+=i
+    return count
+result = new_input()
+sum_count = sum(result)
+print("你一共消费了"+ str(sum_count) + "元，扫码还是现金")
+