在Python中读取协议缓冲文件

Protobuffer是一种二进制格式,因此在原始状态下是不可读的。要读它,去拿 python bindings from Google 安装时使用:

pip install --upgrade gtfs-realtime-bindings

from google.transit import gtfs_realtime_pb2
import urllib.request 

feed = gtfs_realtime_pb2.FeedMessage()
pb_url = "http://someURL/someFile.pb"

with urllib.request.urlopen(pb_url) as response:
    feed.ParseFromString(response.read())
    print(feed)

这会给你类似的东西:

header {
  gtfs_realtime_version: "1.0"
  incrementality: FULL_DATASET
  timestamp: 1579313685
}
entity {
  id: "10-abc-O-1"
  trip_update {
    trip {
      trip_id: "10-1622-O-1"
    }
...