From 8c8441b3795d57161baf49f9163e5f25ec7f684b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=99=9E=E5=A7=AC?= <1252984281@qq.com>
Date: Wed, 24 Mar 2021 13:49:31 +0800
Subject: [PATCH] =?UTF-8?q?=E7=AC=AC=E4=B8=89=E5=91=A8=E7=AC=AC=E4=B8=89?=
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---
 .../lesson3-3.py"                             | 89 +++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 "\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/1\347\217\255/1\347\217\255_7/1\347\217\255_7-\347\254\254\344\270\211\345\221\250/lesson3-3.py"

diff --git "a/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/1\347\217\255/1\347\217\255_7/1\347\217\255_7-\347\254\254\344\270\211\345\221\250/lesson3-3.py" "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/1\347\217\255/1\347\217\255_7/1\347\217\255_7-\347\254\254\344\270\211\345\221\250/lesson3-3.py"
new file mode 100644
index 00000000..a6562e68
--- /dev/null
+++ "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/1\347\217\255/1\347\217\255_7/1\347\217\255_7-\347\254\254\344\270\211\345\221\250/lesson3-3.py"
@@ -0,0 +1,89 @@
+
+# 练习作用域之间的转换
+# global
+
+x = 'yuji'
+def call():
+    global x
+    x = 'zhenji'
+    print(x)
+call()
+
+# nonlocal
+
+def ruler():
+    num_a = 10
+    num_b = 5
+    def multi(num):
+        nonlocal num_a,num_b
+        num_a += 5
+        num_b += num
+        return num_a * num_b
+    return multi
+
+new_ruler = ruler()
+print(new_ruler(1))
+
+# local
+num_c = 11 # 全局变量
+def local_gover():
+    num_d = 12  # 局部变量
+    print(num_d)
+
+local_gover()
+print(num_c)
+
+
+
+
+# 默写一个装饰器, 用来输出函数的执行时间.
+import time
+def clockout(x):
+    def timenote(*args,**kwargs):
+        start_time = time.time()
+        result = x(*args,**kwargs)
+        end_time = time.time()
+        print(f"{x.__name__} sum time:{format(end_time - start_time,'.2f')}s")
+        return result
+    return timenote
+
+@clockout
+def havefun(num_a,num_b):
+    count = 1
+    while True:
+        if count > num_a * num_b:
+            break
+        count += 5
+
+havefun(5,1)
+
+
+# 使用装饰器来为斐波那契函数添加缓存
+
+def cache_deco(f):
+    what = {}
+    def wrapper(*args):
+        if args not in what:
+            what[args] = f(*args)
+        return what[args]
+
+    return wrapper
+
+@cache_deco
+@clockout
+def Fibo(n):
+    if n <= 1:
+        return n
+    else:
+        return Fibo(n-1) + Fibo(n-2)
+
+f = int(input('请输入项数：'))
+
+if f <= 0:
+    print('请重新输入正数：')
+
+else:
+    print('斐波那契数列为：')
+
+    for i in range(f):
+        print(Fibo(i))
-- 
Gitee