python手册学习笔记3

笔记3

http://www.pythondoc.com/pythontutorial3/datastructures.html

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• 装饰器

def log(text):
    def decorator(func):
        def wrapper(*args, **kw):
            print('%s %s():' % (text, func.__name__))
            print('1',func)
            return func(*args, **kw)
        print('2',wrapper)
        return wrapper
    print('3',decorator)
    return decorator
@log('execute')
def now():
    print('2015-3-25')
now()
print('4',now)


>>>
3 <function log.<locals>.decorator at 0x00A3D588>
2 <function log.<locals>.decorator.<locals>.wrapper at 0x00A3D4F8>
execute now():
1 <function now at 0x00A3D540>
2015-3-25
4 <function log.<locals>.decorator.<locals>.wrapper at 0x00A3D4F8>

def log(text):
    def decorator(func):
        def wrapper(*args, **kw):
            print('%s %s():' % (text, func.__name__))
            print('1',func,locals())
            return func(*args, **kw)
        print('2',wrapper,locals())
        return wrapper
    print('3',decorator,locals())
    return decorator
@log('execute')
def now(a,b):
    print('2015-3-25')
now(1,2)
print('4',now,locals())