transport.py 文件源码

def __init__(self, timeout=None, proxy=None, cacert=None, sessions=False):
        if (timeout is not None) and not self.supports_feature('timeout'):
            raise RuntimeError('timeout is not supported with urllib2 transport')
        if proxy:
            raise RuntimeError('proxy is not supported with urllib2 transport')
        if cacert:
            raise RuntimeError('cacert is not support with urllib2 transport')

        self.request_opener = urllib2.urlopen
        if sessions:
            opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(CookieJar()))
            self.request_opener = opener.open

        self._timeout = timeout