Python Scraping get_title

# 目標
* 投票サイトのランキングから、映画のタイトルを取得する

# ソースコード
```py
import requests
from bs4 import BeautifulSoup
import pandas as pd
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support import expected_conditions as ec
from selenium.webdriver.support.ui import WebDriverWait
import time

print("Input file_name:")
file_name = input()
Source_file = "/Users/micksmith/home/work/eBay/Python/" + file_name +".csv"


def scroll_down():
    # height = driver.find_element_by_id('pagination')
    # driver.execute_script('arguments[0].scrollIntoView(true);', height)
    # driver.execute_script('scrollBy(0, -150)')
    try:
        while True:
            height = driver.find_element_by_id('pagination')
            driver.execute_script('arguments[0].scrollIntoView(true);', height)
            driver.execute_script('scrollBy(0, -150)')
            time.sleep(1)
            # try:
            #     height.click()
            # except:
            #     pass
            if(len(driver.find_elements_by_id('pagination')) == 0):
                return
            height.click()
            time.sleep(1)
    except:
        return

def get_title(title_Eng):
    scroll_down()
    # for button in driver.find_elements_by_id('pagination__section'):
    #     button.find_element_by_id('pagination').click()
    #     print(button.text)
    # driver.find_element_by_id('pagination').click()
    items = driver.find_elements_by_class_name('listItem__title')
    for item in items:
        title_Eng.append(item.text)
    print("title_Eng:", title_Eng)
    return title_Eng
       
        
if __name__ == "__main__":
    # Open Browser
    options = Options()
    #options.add_argument('--headless')
    options.add_argument('--no-sandbox')
    options.add_argument('--disable-dev-shm-usage') 
    driver = webdriver.Chrome(executable_path="/Users/micksmith/home/work/eBay/Python/chromedriver", chrome_options=options)
    #url = "https://www.ranker.com/list/most-popular-anime-today/ranker-anime"
    url = "https://www.ranker.com/crowdranked-list/top-50-greatest-animated-films-of-all-time?ref=browse_list&l=1"
    
    title_Eng = []
    print("Page_Num:")
    Page_Num = int(input())
    print("MIN_Price:")
    MIN_Price = int(input())
    print("MAX_Price:")
    MAX_Price = int(input())
    
    
    driver.get(url)
    df = pd.DataFrame()
    df["Title_Eng"] = get_title(title_Eng)
    df["Page_Num"] = [Page_Num for i in range(len(df))]
    df["MIN_Price"] = [MIN_Price for i in range(len(df))]
    df["MAX_Price"] = [MAX_Price for i in range(len(df))]
    
    df.columns = ["Title_Eng","Page_Num","MIN_Price","MAX_Price"]
    df.to_csv(Source_file, index=False)
    # df.to_csv(Source_file)
    driver.quit()            
# res = requests.get(url)
# soup = BeautifulSoup(res.text)

# for title in soup.find_all(class_="listItem__data"):
#     title_Eng.append(title.text)


```


# 結果

<img width="835" alt="Screen Shot 2020-04-13 at 14.11.28.png" src="https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/589212/5a6ca55d-2f3e-72c7-2d62-ae3c81ce0b57.png">

# 分析
* ページ下部までスクロールした後、出現する "LOAD MORE" ボタンをクリックしないと、次のランキングが表示されない仕様
    * scroll_down 関数
        * 要素位置を取得した後、スクロール位置を微調整する (JavaScript)
        * "LOAD MORE" ボタンが出現する限り、ランキングを表示させる
        * 表示された全ての映画タイトルを取得する


# 資料
* 使用した投票サイト
    * https://www.ranker.com/