add 增加不同情况下的修饰器

函数和lambda表达式/函数修饰器.py

@@ -4,13 +4,88 @@
             1、被修饰的函数 B 作为参数传给 函数 A
             2、函数 B 替换成 函数 A 的返回值
 '''
-def funA(fn):
-    print("This is A")
-    fn()
-    return "XYZ"
 
-@funA
-def funB():
-    print("This is B")
+# 将函数赋值给变量，函数本身也是对象
+if __name__ == "__main2__":    
+    def greet(name):
+        return "hello" + name
+    greet_someone = greet
+    print(greet_someone("将函数赋值给变量"))
 
-print(funB)
+# 函数内定义函数
+if __name__ == "__main3__":
+    def greet(name):
+        def get_message():
+            return "hello"
+
+        result = get_message() + name
+        return result
+
+    print (greet("函数内定义参数"))
+
+# 函数作为参数传递给其他函数
+# 函数可以返回其他函数
+
+# 函数修饰器语法糖
+if __name__ == "__main1__":
+    def funA(fn): 
+        print("This is A")
+        fn()
+        return "XYZ"
+
+    @funA # 修饰器本身
+    def funB(): # 被修饰的函数
+        print("This is B")
+
+    print(funB)
+
+# 有参函数修饰器
+if __name__ == "__main4__":
+    def funA(fn): 
+        print("This is A")
+        def param(name):
+            print("This is param start")
+            fn(name)
+            print("This is param end")
+        return param
+
+    @funA # 修饰器本身
+    def funB(name): # 被修饰的函数
+        print("This is B", name, sep=',')
+
+    funB("来自funB的参数")
+
+# 有参数的修饰器
+if __name__ == "__main5__":
+    def args(name):
+        def funA(fn): 
+            print("This is A")
+            def param(name):
+                print("The code create by", name, sep=":")
+                fn()
+                print("This is param end")
+            return param(name) # 不return的话，定义的代码段不会执行
+        return funA
+
+
+    @args("来自修饰器的参数") # 修饰器本身
+    def funB(): # 被修饰的函数
+        print("This is B")
+
+    funB
+
+
+# 多个参数的函数
+if __name__ == "__main__":
+    def w2(fun):
+        def wrapper(*args,**kwargs):
+            print("this is the wrapper head")
+            fun(*args,**kwargs)
+            print("this is the wrapper end")
+        return wrapper
+
+    @w2
+    def hello(name,name2,name3):
+        print("hello"+name+name2+name3)
+
+    hello("world","!!!", "777")