Python "NavigableString" hatası

import requests.
from bs4 import BeautifulSoup.

imdburl = "https://www.imdb.com/chart/top"
r = requests.get(imdburl)
soup = BeautifulSoup(r.content,"html.parser")
gelen_veri = soup.find_all("table",{"class":"chart full-width"})
filmtablosu = (gelen_veri[0].contents) [len(gelen_veri[0].contents)-2]
filmtablosu.find_all("tr")

for film in filmtablosu:
film_başlık = film.find_all("td",{"class":"titlrColumn"})
film_isim = film_başlık[0].text.
film_isim = film_isim.replace("\n","")
print("************************")
print(film_isim)

AttributeError: 'NavigableString' object has no attribute 'find_all'

import requests
from bs4 import BeautifulSoup

imdburl = "https://www.imdb.com/chart/top"
r = requests.get(imdburl)
soup = BeautifulSoup(r.content,"html.parser")
gelen_veri = soup.find("table",{"class":"chart full-width"}).find("tbody",{"class":"lister-list"})
filmtablosu = gelen_veri.find_all("tr")

for film in filmtablosu:
    film_başlık = film.find("td",{"class":"titleColumn"})
    film_isim = film_başlık.a.text
    print(film_isim)