auto save

diy1.py

-import time
-list1 = []
-start_time = time.time()
-for i in range(0, 1000):
-    for b in range(0, 1000):
-        list1.append (0)
-end_time = time.time()
-print(end_time-start_time)
+
+a = {"020":"广州","021":"上海","022":"天津","023":"重庆","024":"沈阳","025":"南京"}
+while True:
+    b = input("输入区号:")
+    if b in a:
+        print(a[b])