从WTForms文件中动态填充烧瓶csv选择字段？

from wtforms import Form, SelectField

class MyForm(Form):
    # 定义一个选择字段
    my_field = SelectField('选择字段')

import csv
from flask import Flask, render_template
from wtforms import SelectField
from myform import MyForm

app = Flask(__name__)

@app.route('/')
def index():
    form = MyForm()
    
    # 从CSV文件中读取选项
    with open('data.csv', 'r') as file:
        reader = csv.reader(file)
        options = [(row[0], row[0]) for row in reader]
    
    # 动态填充选择字段的选项
    form.my_field.choices = options
    
    return render_template('index.html', form=form)

if __name__ == '__main__':
    app.run()

<form method="POST" action="/">
  {{ form.csrf_token }}
  {{ form.my_field.label }} {{ form.my_field }}
  <input type="submit" value="提交">
</form>