save project

zilin.py

-b={'a':1,'b':2}
-b['a']=100
-b['b']=200
-b['c']=300
-print(b)
-if 'c' in b:
-    print(b['c'])
+b={'a':10000,'b':20000}
+b['c']=30000
+k=input('你想买什么?')
+if k in b:
+    print('请支付'+str(b[k])+'元')
+else:
+    print('没货了,请回头再来')