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It's weird to say it but this looks like a bug in your urllib2 implementation. Somehow socket._GLOBAL_DEFAULT_TIMEOUT is None?
On my machine the traceback suggests the following flow of code.
def open(self, fullurl, data=None, timeout=socket._GLOBAL_DEFAULT_TIMEOUT):
# accept a URL or a Request object
if isinstance(fullurl, basestring):
req = Request(fullurl, data)
else:
req = fullurl
if data is not None:
req.add_data(data)
req.timeout = timeout
protocol = req.get_type()
Which is called from:
def urlopen(url, data=None, timeout=socket._GLOBAL_DEFAULT_TIMEOUT):
global _opener
if _opener is None:
_opener = build_opener()
return _opener.open(url, data, timeout)
And in rosmake this is called without extra argunents:
fh= urllib2.urlopen(url)