带有参数的装饰器

一个带有参数的装饰器的例子：

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def decrator(*dargs, **dkargs):     def wrapper(func):         def _wrapper(*args, **kargs):             print "decrator param:", dargs, dkargs             print "function param:", args, kargs             return func(*args, **kargs)         return _wrapper     return wrapper   @decrator(1, a=2) def foo(x, y=0):     print "foo", x, y   foo(3, y=4)   # 输出： # decrator param: (1,) {'a': 2} # function param: (3,) {'y': 4} # foo 3 4

 bottle.py中自动转换参数类型的装饰器：

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def validate(**vkargs):     def decorator(func):         def wrapper(**kargs):             for key in vkargs:                 # 根据vkargs中的参数的类型对kargs的参数进行类型转换                 kargs[key] = vkargs[key](kargs[key])             return func(**kargs)         return wrapper     return decorator     @validate(id=int, x=float, y=float) def move(id, x, y):     print "move %d (%0.2f, %0.2f)"%(id, x, y)   move(id="1", x="0.2", y="0.3")