Python中的函数修饰符@

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1. def func1():
2.     print 'I am function func1'
4. def func2():
5.     print 'I am function func2'

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1. def de( f )
2.     def call_():

3.         print '-------------------------------'
4.         return f()
5.     return _call_

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1. def de( f ):
2.     def _call_():
3.         print '-------------------------------'
4.         return f()
5.     return _call
7. @de
8. def func1():
9.     print 'I am function func1'
11. @de
12. def func2():
13.     print 'I am function func2'
15. if name = '__main__':

16.     func1()
17.     func2()

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1. d:\我的文档\桌面>b.py
2. -------------------------------
3. I am function func1
4. -------------------------------
5. I am function func2
7. d:\我的文档\桌面>

1. @de
2. def func1:
3. ----- 等价于 ------
4. func1 = de( func1 )

1. def de( f ):
2.     def call_():

3.         return f()

4.     return _call # 返回的是一个函数体，而非调用_call_()

1. def func1( lst1, lst2 ):
2.     # 合并两个list，并打印各项
3.     for item in lst1+lst2:
4.         print item
6. def func2( dic ):
7.     # 循环dict，打印各key-value
8.     for k, v in dic.items():
9.         print k, v

1. import sys
2. import traceback
4. def de( f ):
5.     def call_( *args, **kwargs ):

6.         try:
7.             return f( *args , **kwargs )
8.         except:
9.             print 'param type error'
10.     return _call
12. @de
13. def func1( lst1, lst2 ):
14.     for item in lst1+lst2:
15.         print item
17. @de
18. def func2( dic ):
19.     for k, v in dic.items():
20.         print k, v
22. if name = '__main__':
23.     func1( [1,2], [3,4] )
24.     func2( [1,2] )