Selenium will not click class id - selenium

Question

I am trying to have selenium to do the following:
Open a website
Click on the search box
Type "Seattle" in the search box
Select the first result from the suggested results
My code fails at Step 2.
The class id for the search box is "class = input_search ng-pristine ng-valid ng-empty ng-touched"
Here's my code:
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
driver = webdriver.Chrome()
url = 'https://wego.here.com/'
driver.get(url)
driver.find_element_by_css_selector('.input_search.ng-pristine.ng-valid.ng-empty.ng-touched').click()
driver.find_element_by_css_selector('.input_search.ng-pristine.ng-valid.ng-empty.ng-touched').send_keys('Seattle')
driver.find_element_by_css_selector('.input_search.ng-pristine.ng-valid.ng-empty.ng-touched').send_keys(Keys.ENTER)
Any suggestions would be greatly appreciated!
ADDITIONAL QUESTION
Thanks to #Prophet I was able to get the first auto-click and auto-fill done, but when I try to do the same task with a different search box, it does not like it. Please refer to the following code that I added to the existing code:
wait.until(EC.visibility_of_element_located((By.CSS_SELECTOR, "button.btn"))).send_keys(Keys.ENTER)
wait.until(EC.visibility_of_element_located((By.CSS_SELECTOR, "input.itinerary_item_input_0"))).click()
wait.until(EC.visibility_of_element_located((By.CSS_SELECTOR, "input.itinerary_item_input_0"))).send_keys('Chicago')
wait.until(EC.visibility_of_element_located((By.CSS_SELECTOR, "input.itinerary_item_input_0"))).send_keys(Keys.ENTER)
button.btn did work, but not the input.itinerary_item_input_0. Here is the source screenshot:

Answer 1

You are using a wrong locator.
ng-empty and ng-touched may not be there all the times.
So instead of
driver.find_element_by_css_selector('.input_search.ng-pristine.ng-valid.ng-empty.ng-touched').click()
Try using this:
driver.find_element_by_css_selector('input.input_search').click()
input.input_search is an unique, stable locator for that element.
Also, you have to add a delay, preferably to use the expected conditions, as following:
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
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()
wait = WebDriverWait(driver, 20)
url = 'https://wego.here.com/'
driver.get(url)
wait.until(EC.visibility_of_element_located((By.CSS_SELECTOR, "input.input_search"))).click()

Answer 2

wait=WebDriverWait(driver, 60)
driver.get('https://wego.here.com/')
wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR,"input.input_search"))).send_keys("Seattle")
wait.until(EC.element_to_be_clickable((By.XPATH,"//div[#class='dropdown_list']/div[1]"))).click()
This will select the first option after sending a string to input tag.
Imports:
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC