从csv生成树结构

import csv

def generate_tree_from_csv(file_path):
    tree = {}
    with open(file_path, 'r') as csvfile:
        reader = csv.reader(csvfile)
        for row in reader:
            parent = row[0]
            child = row[1]
            if parent not in tree:
                tree[parent] = []
            tree[parent].append(child)
    return tree

file_path = 'data.csv'
tree = generate_tree_from_csv(file_path)
print(tree)