我想看看装饰器的装饰函数的字节码。如何查看装饰函数的字节码?
例如在下面的例子中,fibonacci是通过memoized装饰的。但是,当我在斐波那契上调用“dis.dis”时,它会显示实际函数的字节码。
我希望能够看到一个函数是否已经装饰并看到包含装饰部分的字节码。
我完全误解了一些概念吗?
import collections
import functools
class memoized(object):
'''Decorator. Caches a function's return value each time it is called.
If called later with the same arguments, the cached value is returned
(not reevaluated).
'''
def __init__(self, func):
self.func = func
self.cache = {}
def __call__(self, *args):
if not isinstance(args, collections.Hashable):
# uncacheable. a list, for instance.
# better to not cache than blow up.
return self.func(*args)
if args in self.cache:
print 'get cached version{}'.format(args)
return self.cache[args]
else:
print 'compute {}'.format(args)
value = self.func(*args)
self.cache[args] = value
return value
def __repr__(self):
'''Return the function's docstring.'''
return self.func.__doc__
def __get__(self, obj, objtype):
'''Support instance methods.'''
return functools.partial(self.__call__, obj)
@memoized
def fibonacci(n):
"Return the nth fibonacci number."
if n in (0, 1):
return n
return fibonacci(n-1) + fibonacci(n-2)
print fibonacci(12)
import dis
f = fibonacci
dis.dis(f)