follow.py 文件源码

def lookup(twitter, user_ids):
    """Resolve an entire list of user ids to screen names."""
    users = {}
    api_limit = 100
    for i in range(0, len(user_ids), api_limit):
        fail = Fail()
        while True:
            try:
                portion = lookup_portion(twitter, user_ids[i:][:api_limit])
            except TwitterError as e:
                if e.e.code == 429:
                    err("Fail: %i API rate limit exceeded" % e.e.code)
                    rls = twitter.application.rate_limit_status()
                    reset = rls.rate_limit_reset
                    reset = time.asctime(time.localtime(reset))
                    delay = int(rls.rate_limit_reset
                                - time.time()) + 5 # avoid race
                    err("Interval limit of %i requests reached, next reset on "
                        "%s: going to sleep for %i secs"
                        % (rls.rate_limit_limit, reset, delay))
                    fail.wait(delay)
                    continue
                elif e.e.code == 502:
                    err("Fail: %i Service currently unavailable, retrying..."
                        % e.e.code)
                else:
                    err("Fail: %s\nRetrying..." % str(e)[:500])
                fail.wait(3)
            except urllib2.URLError as e:
                err("Fail: urllib2.URLError %s - Retrying..." % str(e))
                fail.wait(3)
            except httplib.error as e:
                err("Fail: httplib.error %s - Retrying..." % str(e))
                fail.wait(3)
            except KeyError as e:
                err("Fail: KeyError %s - Retrying..." % str(e))
                fail.wait(3)
            else:
                users.update(portion)
                err("Resolving user ids to screen names: %i/%i"
                    % (len(users), len(user_ids)))
                break
    return users