在 Python 中使用 Google Protobuf 序列化数据

Question

I have a text file with contents like this (format ):

Alice:ECE505,56:HIS230,78:REC345,98
Bob:MATH300,78:IN121,79:LEC091,23:ARC,32:WER720,67

I would like to add each class name and score to its perspective person. So far I have something like this:

all_stu = record_pb2.Result()
person = all_stu.student.add()
cl = person.courses.add()

with open(textfile, "r") as readfile:
    txt = readfile.read()
    for line in txt.split('\n'):
        segment = line.split(':')
        person.name = segment[0]

        classes = segment[1:]

        #I have tried this but it only returns the last class and score 
        for c in classes:
            cname, score = c.split(',')
            cl.name = cname
            cl.score = score

I know my loop only returns the last class name and score but how do I store each of the classes and scores for the respective person/line with Google Protobuf? Thanks in advance!

Answer 1

You forget to add each each person you read from the file. Next you need to add each class your find in the person object. You now only create those objects once and thus you overwrite them all the time.

all_stu = record_pb2.Result()
person = all_stu.student.add()

with open(textfile, "r") as readfile:
    txt = readfile.read()
    for line in txt.split('\n'):
        segment = line.split(':')

        person = all_stu.student.add()
        person.name = segment[0]

        classes = segment[1:]

        #I have tried this but it only returns the last class and score 
        for c in classes:
            cl = person.courses.add()
            cname, score = c.split(',')
            cl.name = cname
            cl.score = score

Here I do make the assumption that courses is a repeated field.