python的一些逻辑小问题

代码如下，请问为什么这个代码的icot会报错呢，自学的python，没经过特殊的学习，不知道为什么这个会报错

from threading import Timer
from selenium import webdriver
import os, csv

def __init__():
    global data
    data = []

def open_up():
    global icot
    icot = 0
    global driver
    driver = webdriver.Edge(executable_path=r'D:\anaconda\envs\yolo\msedgedriver.exe')
    driver.get("https://lbs.amap.com/tools/creater")  # https://www.douban.com/

def hello():
    if data == [] and icot == 0:
        os.remove('FlyPoints.csv')
    f = open('FlyPoints.csv', 'w', encoding='utf-8', newline='')
    try:
        longitude = driver.find_element("xpath",
                                        '//*[@class="overlay_item marker current"]/div[2]/div[2]/div[2]/div/span[1]').text
        latitude = driver.find_element("xpath",
                                       '//*[@class="overlay_item marker current"]/div[2]/div[2]/div[2]/div/span[2]').text
        if data[icot] != (longitude, latitude) and latitude != '' and longitude != '':
            print(longitude)
            print(latitude)
            data.append((longitude, latitude))
            icot = icot + 1

    except:
        pass
    if icot >= 10:
        csv_write = csv.writer(f)
        csv_write.writerows(data)
        return
    Timer(1.0, hello).start()

def close_down():
    driver.close()

我自己找出了方法了，用thread的timer替代while就行了

看一下报错的原因是什么