编写无回调的计算密集型非阻塞代码
cooperative的Python项目详细描述
合作
编写非阻塞的计算代价高昂的代码，与非阻塞IO一起使用，而不需要 必须考虑回拨中的所有内容。
batch_accumulate将在生成器上成批迭代，从而产生其他迭代器
传入twisted.internet.task.cooperate
示例
#!/usr/bin/env python
# _*_ coding: utf-8 _*_
from operator import add
import sys
from twisted.internet import defer
from twisted.internet.task import react
from twisted.python import log
from cooperative import batch_accumulate
def expensive(number):
log.msg("starting {}".format(number))
for value in range(100000):
if 25000 == value:
log.msg("1/4 for {}".format(number))
if 50000 == value:
log.msg("1/2 for {}".format(number))
if 75000 == value:
log.msg("3/4 for {}".format(number))
yield number * value / 3.0
@defer.inlineCallbacks
def do_some_expensive_things(number):
"""
Perform one expensive computation cooperatively with any
other iterator passed into twisted's cooperate, then
use it's result to pass into the second computation.
:param number:
:return:
"""
result = yield batch_accumulate(1000, expensive(number))
total = reduce(add, result, 0)
log.msg("first for {}: {}".format(number, total))
result = yield batch_accumulate(1000, expensive(int(total/1e9)))
total = reduce(add, result, 0)
log.msg("second for {}: {}".format(number, total))
defer.returnValue(total)
def main(reactor):
d1 = do_some_expensive_things(54.0)
d2 = do_some_expensive_things(42)
d3 = do_some_expensive_things(10)
d4 = do_some_expensive_things(34)
# Enqueue events to simulate handling external events
d5 = defer.Deferred().addCallback(log.msg)
reactor.callLater(0.3, d5.callback, "########## simulated request 1 ############")
d6 = defer.Deferred().addCallback(log.msg)
reactor.callLater(0.5, d6.callback, "########## sim request 2 ############")
d7 = defer.Deferred().addCallback(log.msg)
reactor.callLater(1.0, d7.callback, "########## simulated request 3 ############")
return defer.gatherResults([d1, d2, d3, d4, d5, d6, d7]).addCallback(log.msg)
if __name__ == "__main__":
log.startLogging(sys.stdout)
react(main, [])
贡献：
在这里提交任何问题：https://github.com/johnwlockwood/cooperative/issues。
- 向development的分支发出pull请求
- https://github.com/johnwlockwood/cooperative.
- documentation是用structuredtext编写的，当前使用
- 狮身人面像风格 列表http://sphinx-doc.org/domains.html#info-field-lists
查看关闭的pull请求，查看开发流程 对master的每个更改都是通过github上的pull请求完成的。代码评审 是受欢迎的，即使是合并的请求。请随意提问 代码。
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