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我有一段代码:扭曲:如何从错误中获取错误参数?
from twisted.web.client import getPage
from twisted.internet import reactor
class TestError(Exception):
def __init__(self, message):
self.message = message
def __repr__(self):
return 'TestError'
def gotPage(response):
print response
reactor.stop()
def gotErr(failure):
raise TestError('This is error')
def newEb(failure):
try:
failure.raiseException()
except TestError as te:
print te.message
reactor.stop()
if __name__ == '__main__':
deferred = getPage('http://somebadpage.net', method='GET')
deferred.addCallback(gotPage)
deferred.addErrback(gotErr)
deferred.addErrback(newEb)
reactor.run()
的方式是在newEb呈现给提取失败误差参数的唯一途径? 当我使用failure.trap或failure.check时,我无法收到错误实例。