The best way to search a file and return required fields from rows

I have the following code that works perfectly. It searches a txt file for an ID number, and if it exists, returns the first and last name.

full listing: https://repl.it/Jau3/0

import csv

#==========Search by ID number. Return Just the Name Fields for the Student
with open("studentinfo.txt","r") as f:
  studentfileReader=csv.reader(f)
  id=input("Enter Id:")
  for row in studentfileReader:
    for field in row:
      if field==id:
        currentindex=row.index(id)
        print(row[currentindex+1]+" "+row[currentindex+2])

File contents

001,Joe,Bloggs,Test1:99,Test2:100,Test3:33
002,Ash,Smith,Test1:22,Test2:63,Test3:99

For teaching and learning purposes, I would like to know if there are any other methods to achieve the same thing (elegant, simple, pythonic) or if perhaps this is indeed the best solution?

My question arises from the fact that it seems possible that there may be an inbuilt method or some function that more efficiently retrieves the current index and searches for fields.....perhaps not though.

Thanks in advance for the discussion and any explanations that I will accept as answers.