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123.py

+import func
+a=func.b()
+b=func.c(a)
+print(b)
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func.py

+def b():
+    total = []
+    while True:
+        unit= input("请输入：")
+        if unit== 'q':
+            break
+        else:
+            try:
+                unit=int(unit)
+            except:
+                print("输入错误")
+            else:
+                total.append(unit)
+    return total
+
+def c(d):
+    e=0
+    for i in d:
+        e=e+i
+    return e
+'''
+f=b()
+g=c(f)
+print("一共消费了"+str(g)+"元。")
+'''
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