auto save

func.py

+def new_input():
+    total = []
+    while True:
+        unit= input("请输入：(退出去输入q)")
+        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("="*30)
+    return total
+def sun(money):
+    count = 0
+    for i in money:
+        count = count+i
+    return count
+price = new_input()
+pay=sun(price)
+print("您一共消费" + str(pay) +"元。扫码还是现金呢？")