一种对TCO的常见误解是：由编译器或运行时系统把尾调用/尾递归实现得很快。这不是TCO真正要强调的事情——不爆栈才是最重要的。也就是说其实重点不在“优化”，而在于“尾调用不爆栈”这个语义保证。“proper tail-call”的叫法远比“tail-call optimization”来得合适。因而像题主说的那种做法，可以算部分TCO，但算不上“性能优化”意义上的优化。
def tail_call_optimized(g): """ This function decorates a function with tail call optimization. It does this by throwing an exception if it is it's own grandparent, and catching such exceptions to fake the tail call optimization. This function fails if the decorated function recurses in a ...
cpython本身不支持尾递归优化, 但是一个牛人想出的解决办法:实现一个 tail_call_optimized 装饰器 #!/usr/bin/env python2.4 # This program shows off a python decorator( # which implements tail call optimization. It # does this by throwing an exception if it is # it's own grandparent, and ca...
“proper tail-call”的叫法远比“tail-call optimization”来得合适。因而像题主说的那种做法，可以算...
cpython本身不支持尾递归优化, 但是一个牛人想出的解决办法:实现一个 tail_call_optimized 装饰器 #!/usr/bin/env python2.4# This program shows off a python decorator(# which implements tail call optimization. It# does this by throwing an exception if it is# it's own grandparent, and catching...
我们后面会讲到如何编写decorator。现在,只需要使用这个@tail_call_optimized,就可以顺利计算出fact(1000): 代码描述如下: 1 #!/usr/bin/env python2.4 2 # This program shows off a python decorator( 3 # which implements tail call optimization. It ...
# which implements tail call optimization. It # does this by throwing an exception if it is # it's own grandparent, and catching such # exceptions to recall the stack. import sys class TailRecurseException: def __init__(self, args, kwargs): ...
实现一个 tail_call_optimized 装饰器 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #!/usr/bin/env python2.4# This program shows off a pythondecorator(# whichimplementstailcall optimization.It # doesthisby throwing an exceptionifit is ...
Tail Call Optimization Decorator " Python recipes " ActiveState Codecode.activestate.com 但这个代码实际上是在Python2.4的环境下运行,我们需要优化为支持Python3.6环境的代码,代码如下 class TailRecurseException(BaseException): def __init__(self, args, kwargs): ...
optimization. It does this by throwing an exception if it is it's own grandparent, and catching such exceptions to fake the tail call optimization. This function fails if the decorated function recurses in a non-tail context. """ def func(*args, **kwargs): ...