问使用CSV数据的python中的树结构

EN

from ete3 import Tree
import numpy as np
import csv
import pandas as pd
f=open("UdemyT21.csv","r")
csvreader=csv.reader(f)
next(f)
test=list(csvreader)
header=['ID','Name','ParentId']

mydict = {rows[0]:rows[2] for rows in test}
for key in mydict.items():
  for value in mydict.items():
    if value==None:
        t=Tree(key)
        t.show()        
    else:
        t=Tree("(value,key);")
        t.show()