我正在收到NameError：未从Selenium Webscrape中定义名称“数据”，但是我已经在代码中定义了它，任何人都可以看到错在哪里吗？

Question

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions
from selenium.webdriver.support.ui import WebDriverWait

def races(main_url):
    driver = webdriver.Chrome()
    driver.get(main_url)
    driver.implicitly_wait(2)

    races = driver.find_elements_by_class_name('time-location')
    races = [race.text[:5] for race in races]
    races = [race.replace(':', '') for race in races]

    driver.close()

    return races

import pandas as pd    

def scrape(url):
    driver = webdriver.Chrome()
    driver.get(url)
    driver.implicitly_wait(2)
    driver.find_elements_by_class_name('racecard-ajax-link')[1].click()

    WebDriverWait(driver,5).until(expected_conditions.presence_of_element_located((By.XPATH, '//* [@id="tab-racecard-sectional-times"]/div/div[1]/div[1]/div[2]/div/button')))

这是我将Web抓取结果存储到变量数据中的位置，因此很难查看导致错误的原因。感谢任何帮助。

    data = [main]


    for horse in driver.find_elements_by_class_name('card-item'):
        horseName = horse.find_element_by_class_name('form-link').text
        times = horse.find_elements_by_class_name('sectionals-time')
        times = [time.text for time in times]
        print('{}: {}'.format(horseName, times))
    print()

    driver.close()

    return data

def main():
    date = '6-October-2018'
    main_url = 'http://www.attheraces.com/racecard/Wolverhampton/' + date
    for race in races(main_url):
        url = main_url + '/' + race
        print(url)
        scrape(url)

if __name__ == '__main__':
    main()

这时，webscarper返回了sublime中的所有数据结果，但是由于抛出NameError，它并未保存到csv文件中：在df = pd.DataFrame（data）之后未定义名称“ data”

df = pd.DataFrame(data)
df.to_csv("jan_1")