find返回None时的BeautifulSoup错误处理 [英] BeautifulSoup error handling when find returns NoneType

问题描述

我正在从一个网站上抓取搜索结果，其中每个结果都包含在中，并具有与之相关的一系列数据.但是，其中的某些数据值丢失了，当它们丢失时，将返回错误"NoneType"对象没有属性"text".

I am scraping search results from a website where each result is contained in a and has a range of data associated with it. However some of these data values are missing and when they are, the error ''NoneType' object has no attribute 'text'' is returned.

我放入了try/except块.当前，当缺少其中一个值时，将跳过整个搜索结果.我该怎么做才能将丢失的值替换为要保存到的xls文件中的"或空白?

I have put in a try/except block. Currently the entire search result is skipped when one of the values is missing. What can I do to allow the missing values to be replaced with a "", or blank in the xls file I am saving to?

我的代码如下:

divs = soup.find_all("div", class_="result-item standard") + soup.find_all("div", class_="result-item standard  basic-ad")     
for div in divs:
    try:
        #item_title = " ".join(div.h2.a.text.split())
        item = div.h2.a.text.split()
        item_year = item[0]
        item_make = item[1]

        item_model = ""
        for i in range (2,len(item)):
            item_model = item_model + item[i] + " "

        item_eng = div.find("li", "item-engine").text
        item_trans = div.find("li", "item-transmission").text
        item_body = div.find("li", "item-body").text
        item_odostr = div.find("li", "item-odometer").text
        item_odo = ''.join(c for c in item_odostr if c.isdigit())
        item_pricestr = " ".join(div.find("div", "primary-price").text.split())
        item_price = ''.join(c for c in item_pricestr if c.isdigit())
        item_adtype = div.find("div", "ad-type").span.text
        #item_distance = div.find("a", "distance-from-me-link").text
        item_loc = div.find("div", "call-to-action").p.text
        item_row = (str(x),item_year,item_make,item_model,item_eng,item_trans,item_body,item_odo,item_price,item_adtype,item_loc)
        print ",".join(item_row)
        print(" ")

        for i in range(len(item_row)):
            ws.write(x,i,item_row[i])

        if x % 500 == 0 :
            wb.save("data.xls")


    except AttributeError as e:
        with open("error"+str(x)+".txt", "w+") as error_file:
            error_file.write(div.text.encode("utf-8"))      

推荐答案

例如:

item_eng = div.find("li", "item-engine").text if div.find("li", "item-engine") else ''

或:

item_eng = div.find("li", "item-engine").text if len(div.find_all("li", "item-engine"))!=0 else ''

这篇关于find返回None时的BeautifulSoup错误处理的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！