然而,我需要履行一项职能,履行这一论点的职能,即每当评估其论点时,就有1,000次。 我有这样的情况:
def runner(f):
def inner(*args):
for i in xrange(1000):
f(*args)
return inner
但看来,如同这一条一样:runner(f)(random.randint(1,UPPER_BOUND)
的援引有1,000次,有相同的论据。 如何正确?
然而,我需要履行一项职能,履行这一论点的职能,即每当评估其论点时,就有1,000次。 我有这样的情况:
def runner(f):
def inner(*args):
for i in xrange(1000):
f(*args)
return inner
但看来,如同这一条一样:runner(f)(random.randint(1,UPPER_BOUND)
的援引有1,000次,有相同的论据。 如何正确?
您再次遇到的问题是,<代码> random.randint(1,UPPER_BOUND)在接通<代码>inner(<>inner(>功能>时,将立即进行评估。 你们需要的是将评价推迟到以后进行。
You could try something like this:
>>> def runner(f, callable):
... def inner():
... for i in xrange(1000):
... f(*callable())
... return inner
...
>>> runner(f, lambda: (random.randint(1, 1000),))()
603
385
321
etc.
请注意,<编码>可唱名表决代码>每次打上原有功能<代码>f。 还注意到<编码>可唱名表决代码>必须交回序列号,如图或清单。
www.un.org/spanish/ga/president 你们可以这样做:
>>> def runner(f, callable):
... def inner(*args, **kwds):
... for i in xrange(1000):
... pos = list(callable())
... pos.extend(args)
... f(*pos, **kwds)
... return inner
...
>>> def f(a, b, c, d = 3):
... print a, b, c, d
...
>>> runner(f, lambda: (random.randint(1,1000),))(3, 5, d = 7)
771 3 5 7
907 3 5 7
265 3 5 7
你们需要改变随机计算。 职能定义:
例如,正如你开始的一样,@
is decorator syntax, 你可在here上读。 如果你不熟悉。 less然从另一个岗位上偷走ello子:
import random
UPPER_BOUND = 1000
def runner(fn):
def wrapped():
for i in range(0,10):
stuff = random.randint(1,UPPER_BOUND)
print(str(stuff) + : + fn())
return wrapped
@runner
def hello():
return hello world
if __name__== __main__ :
hello()
Edit: also see here 理解你为何随意行事。 干.只有一次(在定义时间)执行,这就是为什么你的工作每次都有同样的论据。
页: 1 休息室内的电话:
def runner(function):
def inner(callable, args=()):
for i in xrange(1000):
function(callable(*args))
return inner
你们可以打电话给主人:
runner(f)(random.randint, args=(1, UPPER_BOND))
在我看来,你试图做些什么(也不涉及lam。
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