auto save

func.py

+def a_in():
+    total = []
+    while True:
+        unit= input("请输入：")
+        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 sum(unit):
+    c=0
+    for i in unit:
+        c=c+i
+    return c 
+r=a_in()
+pay=sum(r)
+print("一共消费了"+str(pay)+"元")
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