如何在python 3和selenium webdriver中等待文本输入是4个字符

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

driver = webdriver.Chrome()

driver.get("http://example.com")

wait = WebDriverWait(driver, 10)  # 设置最长等待时间为10秒
element = wait.until(EC.text_to_be_present_in_element_value((By.ID, "input_id"), "abcd"))

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

driver = webdriver.Chrome()
driver.get("http://example.com")

wait = WebDriverWait(driver, 10)
element = wait.until(EC.text_to_be_present_in_element_value((By.ID, "input_id"), "abcd"))

# 在等待结束后，进行后续操作

driver.quit()