访问；html“U汤”；在python中从类外开始

我对使用类这件事很陌生

我试图调用html_soup变量，以便在类外使用它

我对类的定义如下：

from bs4 import BeautifulSoup
from requests import get
from urllib.request import Request, urlopen

from selenium.webdriver.support import expected_conditions as ec
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium import webdriver

class DataScrape():
    def __init__(self, website):
        self.website = website
        self.driver = webdriver.Chrome(
           executable_path=r"C:/Users/littl/Downloads/"
        + "chromedriver_win32/chromedriver.exe")
        # self.options = Options()
        # self.options.add_argument("--headless")# Runs Chrome in headless mode.
        # self.options.add_argument('--no-sandbox')# # Bypass OS security model
        # self.options.add_argument('start-maximized')
        # self.options.add_argument('disable-infobars')
        # self.options.add_argument("--disable-extensions")
        # self.driver = webdriver.Chrome(chrome_options=self.options,
        # executable_path=
        # r'C:/Users/littl/Downloads/chromedriver_win32/chromedriver.exe')

    def bs4Scrape(self, urlToScrape):
        req = Request(urlToScrape, headers={'User-Agent': 'Mozilla/5.0'})
        web_byte = urlopen(req).read()
        webpage = web_byte.decode('utf-8')
        self.html_soup = BeautifulSoup(webpage, 'html5lib')

    def seleniumNavigate(self):     
        self.driver.get(self.website)     

imdbScrape = DataScrape("https://www.imdb.com/")
imdbScrape.seleniumNavigate()
wait = WebDriverWait(imdbScrape.driver, 10)
wait.until(ec.element_to_be_clickable((By.XPATH,
                            '//*[@id="suggestion-search"]'))).send_keys("the"
                            + " fifth element")

firstSelection = wait.until(ec.element_to_be_clickable((By.XPATH,
                                 '//*[@id="react-autowhatever-1--'
                                 + 'item-0"]/span')))
firstSelection.location_once_scrolled_into_view
firstSelection.click()
imdbUrlToScrape = imdbScrape.driver.current_url
imdbScrape.driver.close()
print(imdbScrape.html_soup)

  imdbScrape.bs4Scrape(imdbUrlToScrape).html_soup

我试图这样称呼它：

from bs4 import BeautifulSoup
from requests import get
from urllib.request import Request, urlopen

from selenium.webdriver.support import expected_conditions as ec
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium import webdriver

class DataScrape():
    def __init__(self, website):
        self.website = website
        self.driver = webdriver.Chrome(
           executable_path=r"C:/Users/littl/Downloads/"
        + "chromedriver_win32/chromedriver.exe")
        # self.options = Options()
        # self.options.add_argument("--headless")# Runs Chrome in headless mode.
        # self.options.add_argument('--no-sandbox')# # Bypass OS security model
        # self.options.add_argument('start-maximized')
        # self.options.add_argument('disable-infobars')
        # self.options.add_argument("--disable-extensions")
        # self.driver = webdriver.Chrome(chrome_options=self.options,
        # executable_path=
        # r'C:/Users/littl/Downloads/chromedriver_win32/chromedriver.exe')

    def bs4Scrape(self, urlToScrape):
        req = Request(urlToScrape, headers={'User-Agent': 'Mozilla/5.0'})
        web_byte = urlopen(req).read()
        webpage = web_byte.decode('utf-8')
        self.html_soup = BeautifulSoup(webpage, 'html5lib')

    def seleniumNavigate(self):     
        self.driver.get(self.website)     

imdbScrape = DataScrape("https://www.imdb.com/")
imdbScrape.seleniumNavigate()
wait = WebDriverWait(imdbScrape.driver, 10)
wait.until(ec.element_to_be_clickable((By.XPATH,
                            '//*[@id="suggestion-search"]'))).send_keys("the"
                            + " fifth element")

firstSelection = wait.until(ec.element_to_be_clickable((By.XPATH,
                                 '//*[@id="react-autowhatever-1--'
                                 + 'item-0"]/span')))
firstSelection.location_once_scrolled_into_view
firstSelection.click()
imdbUrlToScrape = imdbScrape.driver.current_url
imdbScrape.driver.close()
print(imdbScrape.html_soup)

  imdbScrape.bs4Scrape(imdbUrlToScrape).html_soup

但在汇编时说：

NoneType' object has no attribute 'html_soup'

如何编写代码，以便在类外访问html_soup

我猜我必须用另一种方式定义变量，但不确定如何定义

---

如果您能提供任何帮助，我们将不胜感激。

html_-soup

根据您的代码，它不是该类的一个属性吗？老实说，我不确定这是我第一次使用该类系统，我尝试了一些事情，但不确定如何正确地使用它。

imdbScrape.bs4Scrape（imdbUrlToScrape）。html_-soup

真是一团糟，因为您正在执行函数调用或方法调用（对返回None的函数）并尝试访问它在同一行中设置的属性。不要那样做。

html\u-soup

是在类的实例上设置的。很难从您的代码中分辨出来，我也不是OOP方面的专家，但我目前认为不需要类。请尝试

imdbScrape.html\u soup

。请注意，变量名和函数名应该跟在带有下划线的

小写字母后面。@littlejiver Do
imdbScrape.bs4Scrape（imdbUrlToScrape）
。注意，您已经在使用访问类实例上的某些内容的概念（在本例中，对于类DataScrape，实例/对象是imdbScrape）。然后分别执行
imdbScrape.html\u soup
，因为
html\u soup
是在实例上设置的。本质上，类没有什么特别之处，只是一些额外的语法。