我们在这里使用 Buildout 作为构建包的一种方式，当尝试通过运行下载鸡蛋时，我们总是会遇到非常令人沮丧的超时bin/buildout：
We have no distributions for python-dateutil that satisfies 'python-dateutil>=1.5'.
While:
Installing python_section.
Getting distribution for 'python-dateutil>=1.5'.
An internal error occured due to a bug in either zc.buildout or in a
recipe being used:
Traceback (most recent call last):
File "/vagrant/eggs/zc.buildout-2.1.1-py2.7.egg/zc/buildout/buildout.py", line 1921, in main
getattr(buildout, command)(args)
File "/vagrant/eggs/zc.buildout-2.1.1-py2.7.egg/zc/buildout/buildout.py", line 602, in install
installed_files = self[part]._call(recipe.install)
File "/vagrant/eggs/zc.buildout-2.1.1-py2.7.egg/zc/buildout/buildout.py", line 1356, in _call
return f()
File "/vagrant/eggs/zc.recipe.egg-2.0.0-py2.7.egg/zc/recipe/egg/egg.py", line 126, in install
reqs, ws = self.working_set()
File "/vagrant/eggs/zc.recipe.egg-2.0.0-py2.7.egg/zc/recipe/egg/egg.py", line 84, in working_set
allow_hosts=self.allow_hosts)
File "/vagrant/eggs/zc.buildout-2.1.1-py2.7.egg/zc/buildout/easy_install.py", line 782, in install
return installer.install(specs, working_set)
File "/vagrant/eggs/zc.buildout-2.1.1-py2.7.egg/zc/buildout/easy_install.py", line 626, in install
for dist in self._get_dist(requirement, ws):
File "/vagrant/eggs/zc.buildout-2.1.1-py2.7.egg/zc/buildout/easy_install.py", line 448, in _get_dist
dist, avail = self._satisfied(requirement)
File "/vagrant/eggs/zc.buildout-2.1.1-py2.7.egg/zc/buildout/easy_install.py", line 204, in _satisfied
return None, self._obtain(req, source)
File "/vagrant/eggs/zc.buildout-2.1.1-py2.7.egg/zc/buildout/easy_install.py", line 372, in _obtain
if index.obtain(requirement) is None:
File "/usr/lib/python2.7/dist-packages/setuptools/package_index.py", line 340, in obtain
self.prescan(); self.find_packages(requirement)
File "/usr/lib/python2.7/dist-packages/setuptools/package_index.py", line 325, in find_packages
self.scan_url(self.index_url + requirement.unsafe_name+'/')
File "/usr/lib/python2.7/dist-packages/setuptools/package_index.py", line 668, in scan_url
self.process_url(url, True)
File "/usr/lib/python2.7/dist-packages/setuptools/package_index.py", line 223, in process_url
page = self.process_index(url, page)
File "/usr/lib/python2.7/dist-packages/setuptools/package_index.py", line 300, in process_index
self.scan_url(new_url)
File "/usr/lib/python2.7/dist-packages/setuptools/package_index.py", line 668, in scan_url
self.process_url(url, True)
File "/usr/lib/python2.7/dist-packages/setuptools/package_index.py", line 201, in process_url
f = self.open_url(url, "Download error on %s: %%s -- Some packages may not be found!" % url)
File "/usr/lib/python2.7/dist-packages/setuptools/package_index.py", line 610, in open_url
return open_with_auth(url)
File "/usr/lib/python2.7/dist-packages/setuptools/package_index.py", line 753, in _socket_timeout
return func(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/setuptools/package_index.py", line 779, in open_with_auth
fp = urllib2.urlopen(request)
File "/usr/lib/python2.7/urllib2.py", line 126, in urlopen
return _opener.open(url, data, timeout)
File "/usr/lib/python2.7/urllib2.py", line 400, in open
response = self._open(req, data)
File "/usr/lib/python2.7/urllib2.py", line 418, in _open
'_open', req)
File "/usr/lib/python2.7/urllib2.py", line 378, in _call_chain
result = func(*args)
File "/usr/lib/python2.7/urllib2.py", line 1207, in http_open
return self.do_open(httplib.HTTPConnection, req)
File "/usr/lib/python2.7/urllib2.py", line 1180, in do_open
r = h.getresponse(buffering=True)
File "/usr/lib/python2.7/httplib.py", line 1030, in getresponse
response.begin()
File "/usr/lib/python2.7/httplib.py", line 407, in begin
version, status, reason = self._read_status()
File "/usr/lib/python2.7/httplib.py", line 365, in _read_status
line = self.fp.readline()
File "/usr/lib/python2.7/socket.py", line 447, in readline
data = self._sock.recv(self._rbufsize)
timeout: timed out
有没有办法防止这些超时？为什么会发生？