auto save

diy.py

+def collect_price():
+    total=[]
+    while True:
+        unit=input("输入价格：")
+        if unit == 'q':
+            break
+        try:
+            unit=int(unit)
+        except:
+            print("价格是数字")
+        else:
+            total.append(unit)
+    return total
+
+def sum(ptotal):
+    count=0
+    for i in ptotal:
+        count=count+i
+    return count
+
+
+total=collect_price()
+psum=sum(total)
+print(psum)
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