Twitsted ValueError: Unknown ECC curve on Raspian Stretch

Question

我想使用我的 Raspberry Pi 3，运行ning Rapian Stretch 进行网络抓取项目。对于 python，我使用 berryconada 发行版。当我运行我的蜘蛛时，我得到

ValueError: Unknown ECC curve

在我的笔记本电脑 (Xubuntu 16.04) 上一切正常运行。也许我需要安装一个额外的库什么的？

在完整回溯下方。

Traceback (most recent call last):
  File "/home/pi/berryconda3/lib/python3.6/site-packages/twisted/internet/defer.py", line 1384, in _inlineCallbacks
    result = result.throwExceptionIntoGenerator(g)
  File "/home/pi/berryconda3/lib/python3.6/site-packages/twisted/python/failure.py", line 393, in throwExceptionIntoGenerator
    return g.throw(self.type, self.value, self.tb)
  File "/home/pi/berryconda3/lib/python3.6/site-packages/scrapy/core/downloader/middleware.py", line 43, in process_request
    defer.returnValue((yield download_func(request=request,spider=spider)))
  File "/home/pi/berryconda3/lib/python3.6/site-packages/scrapy/utils/defer.py", line 45, in mustbe_deferred
    result = f(*args, **kw)
  File "/home/pi/berryconda3/lib/python3.6/site-packages/scrapy/core/downloader/handlers/__init__.py", line 65, in download_request
    return handler.download_request(request, spider)
  File "/home/pi/berryconda3/lib/python3.6/site-packages/scrapy/core/downloader/handlers/http11.py", line 63, in download_request
    return agent.download_request(request)
  File "/home/pi/berryconda3/lib/python3.6/site-packages/scrapy/core/downloader/handlers/http11.py", line 300, in download_request
    method, to_bytes(url, encoding='ascii'), headers, bodyproducer)
  File "/home/pi/berryconda3/lib/python3.6/site-packages/twisted/web/client.py", line 1633, in request
    endpoint = self._getEndpoint(parsedURI)
  File "/home/pi/berryconda3/lib/python3.6/site-packages/twisted/web/client.py", line 1617, in _getEndpoint
    return self._endpointFactory.endpointForURI(uri)
  File "/home/pi/berryconda3/lib/python3.6/site-packages/twisted/web/client.py", line 1494, in endpointForURI
    uri.port)
  File "/home/pi/berryconda3/lib/python3.6/site-packages/scrapy/core/downloader/contextfactory.py", line 59, in creatorForNetloc
    return ScrapyClientTLSOptions(hostname.decode("ascii"), self.getContext())
  File "/home/pi/berryconda3/lib/python3.6/site-packages/scrapy/core/downloader/contextfactory.py", line 56, in getContext
    return self.getCertificateOptions().getContext()
  File "/home/pi/berryconda3/lib/python3.6/site-packages/scrapy/core/downloader/contextfactory.py", line 51, in getCertificateOptions
    acceptableCiphers=DEFAULT_CIPHERS)
  File "/home/pi/berryconda3/lib/python3.6/site-packages/twisted/python/deprecate.py", line 792, in wrapped
    return wrappee(*args, **kwargs)
  File "/home/pi/berryconda3/lib/python3.6/site-packages/twisted/internet/_sslverify.py", line 1595, in __init__
    self._ecCurve = _OpenSSLECCurve(_defaultCurveName)
  File "/home/pi/berryconda3/lib/python3.6/site-packages/twisted/internet/_sslverify.py", line 1744, in __init__
    raise ValueError("Unknown ECC curve.")

Answer 1

我放弃了 berryconda 并 pip 安装了 scrapy。如果你在 Jessie 上遇到这个错误，移动到 Stretch 可以让你访问更新的 openssl 库，其中包含缺失的东西。

升级到 Stretch 后，我从路径中删除了 berryconda，pip 卸载了密码学、twisted、pyopenssl 和 scrapy。

然后使用无缓存选项我 pip 安装了 scrapy，它带回了所有那些包，现在我的蜘蛛是运行。

Twitsted ValueError: Unknown ECC curve on Raspian Stretch

Twitsted ValueError: Unknown ECC curve on Raspian Stretch

twisted

scrapy

raspbian