大家好，我是新手，我想看看有没有人能帮上忙。我正试图在网站上实现文本输入的自动化。我正在尝试运行一段代码，如果输入框为空，则在不按向下键的情况下键入4.00。提供了一张图像来帮助理解该问题。先谢谢你。

from selenium import webdriver
from selenium.webdriver.common.by import By
import time
import pyautogui

driver = webdriver.Chrome()
driver.maximize_window()

login = driver.get("somesite")
sleep = time.sleep(10)

sleep

select_applications = driver.find_element(By.XPATH,"/html/body/div[3]/div[2]/div[1]/div[1]/div[1]/div/div/div/div/header/div[3]/div[3]/div[1]/button").click()
time.sleep(3)

select_app = driver.find_element(By.XPATH,"/html/body/div[3]/div[2]/div[1]/div[1]/div[1]/div/div/div/div/header/div[3]/div[3]/div[2]/div/div[2]/div/div/div[5]/div/div[33]/div/div/div[1]/span/a/img").click()

time.sleep(10)

py = pyautogui

py.moveTo('Wed.PNG')

py.move(0,35)

send_click = py.click()

if send_click = " ": 
py.hotkey("4.00)
else:
py.hotkey("down")

我尝试运行if语句，但没有得到任何结果。