Update 16-20.Python语言进阶.md

没有引用包下面代码会报错
2020-03-19 16:22:03 +08:00 · 2020-03-19 16:22:03 +08:00 · 2de843361f
parent 3351f019ed
commit 2de843361f
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--- a/Day16-20/16-20.Python语言进阶.md
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@ -484,6 +484,9 @@
  例子：输出函数执行时间的装饰器。

  ```Python
+  from functools import wraps
+  from time import time
+  
  def record_time(func):
      """自定义装饰函数的装饰器"""