type.py

from selenium import webdriver
from selenium.webdriver import ActionChains
import time

driver=webdriver.Chrome("chromedriver.exe")
driver.get("https://twitter.com/login")
time.sleep(3)

driver.find_element_by_xpath("//input[@name='session[username_or_email]']").sendkeys("type username")
driver.find_element_by_xpath("//input[@name='session[password]']").sendkeys("type password")
driver.find_element_by_xpath("//div[@data-testid='LoginForm_Login_Button']").click()
time.sleep(3)

driver.find_element_by_class_name('DraftEditor-root').click()
element=driver.find_element_by_class_name('public-DraftEditorPlaceholder-root')
ActionChains(driver).move_to_element(element).send_keys("hello world").perform()