distnet.py 文件源码

def compute_dependencies(self, filename=REQUIRES):
        text = Utils.readf(filename)
        data = safe_urlencode([('text', text)])

        if '--offline' in sys.argv:
            self.constraints = self.local_resolve(text)
        else:
            req = Request(get_resolve_url(), data)
            try:
                response = urlopen(req, timeout=TIMEOUT)
            except URLError as e:
                Logs.warn('The package server is down! %r' % e)
                self.constraints = self.local_resolve(text)
            else:
                ret = response.read()
                try:
                    ret = ret.decode('utf-8')
                except Exception:
                    pass
                self.trace(ret)
                self.constraints = parse_constraints(ret)
        self.check_errors()