Почему выдает ошибку Cannot choose from an empty sequence?

Question

[WASD1222124]

def login():
    driver.find_element_by_tag_name('body').send_keys(Keys.COMMAND + 't')
    driver.get("https://scrap.tf/login/")
    print("waiting for login")
    (WebDriverWait(driver, 100).until(expected_conditions.title_contains("Scrap.TF")))
    print("joining raffles..")
    # rafflejoin()


urls = []


def createlist(ids):
    global urls
    for id in ids:
        urls.append("https://scrap.tf/raffles/" + id)


login()
driver.get("https://scrap.tf/raffles/ending")
SCROLL_PAUSE_TIME = 0.5
html = driver.find_element_by_tag_name('html')
last_height = driver.execute_script("return document.body.scrollHeight")
y = 1000
for timer in range(0, 15):
    driver.execute_script("window.scrollTo(0, " + str(y) + ")")
    if (exists("panel-body raffle-pagination-done") == True):
        print("Loaded all raffles")
        break
    y += 1000
    time.sleep(1)

id_dump = []


def filterdiv(divs):
    global id_dump
    for div in divs:
        id_ = div.strip("raffle-box")
        id_dump.append(id_)


html = driver.execute_script("return document.getElementsByTagName('html')[0].innerHTML")
parse = BeautifulSoup(html, 'html.parser')
selector = Selector(text=html)
divs = selector.css('.panel-raffle::attr(id)').getall()

count = 0
filterdiv(divs)
createlist(id_dump)
print(urls)


def rafflejoin():
    global count
    try:
        visit = random.choice(urls)
    except IndexError as e:
        print(e)

Почему выдает ошибку Cannot choose from an empty sequence?

Answer 1

[Vindicar]

visit = random.choice(urls)
У тебя в urls пусто на момент вызова функции.

urls = []  # в urls пусто

# тут ты только определяешь функцию, но не вызываешь её
def createlist(ids):
    global urls
    for id in ids:
        urls.append("https://scrap.tf/raffles/" + id)
# так что тут urls всё ещё пуст
# внутри login() вызывается rufflejoin(). А urls всё ещё пуст.
login()