我写了一个用于数据抓取的代码;它适用于某些页面,但对于某些页面却显示:
KeyError:'isbn'。
您能指导我如何解决此问题吗?
这是我的代码:
import requests
import re
import json
from bs4 import BeautifulSoup
import csv
import sys
import codecs
def Soup(content):
soup = BeautifulSoup(content, 'html.parser')
return soup
def Main(url):
r = requests.get(url)
soup = Soup(r.content)
scripts = soup.findAll("script", type="application/ld+json",
text=re.compile("data"))
prices = [span.text for span in soup.select(
"p.product-field.price span span") if span.text != "USD"]
with open("AudioBook/Fiction & Literature/African American.csv", 'a', encoding="utf-8", newline="") as f:
writer = csv.writer(f)
writer.writerow(["Title", "Writer", "Price", "IMG", "URL", "ISBN"])
for script, price in zip(scripts, prices):
script = json.loads(script.text)
title = script["data"]["name"]
author = script["data"]["author"][0]["name"]
img = f'https:{script["data"]["thumbnailUrl"]}'
isbn = script["data"]["isbn"]
url = script["data"]["url"]
writer.writerow([title, author, price, img, url, isbn])
for x in range(1,10):
url = ("https://www.kobo.com/ww/en/audiobooks/contemporary-1?pageNumber=" + str(x))
print("Scrapin page " + str(x) + ".....")
Main(url)
答案 0 :(得分:2)
由于有声读物在列表页面上没有ISBN,因此您可以使用默认值为这种情况做准备,例如:
isbn = script["data"].get("isbn", "")
在这种情况下,如果"isbn"
中不存在script["data"]
键,则它会回退到空字符串的值。
或者,您可以从特定于有声读物的页面(上面的script["data"]["url"]
)获得该书的ISBN,例如:
def Main(url):
r = requests.get(url)
soup = Soup(r.content)
scripts = soup.findAll("script", type="application/ld+json",
text=re.compile("data"))
prices = [span.text for span in soup.select(
"p.product-field.price span span") if span.text != "USD"]
with open("AudioBook/Fiction & Literature/African American.csv", 'a', encoding="utf-8", newline="") as f:
writer = csv.writer(f)
writer.writerow(["Title", "Writer", "Price", "IMG", "URL", "ISBN"])
for script, price in zip(scripts, prices):
script = json.loads(script.text)
title = script["data"]["name"]
author = script["data"]["author"][0]["name"]
img = f'https:{script["data"]["thumbnailUrl"]}'
# NEW CODE
url = script["data"]["url"]
if "isbn" in script["data"]:
# ebook listings
isbn = script["data"]["isbn"]
else:
# audiobook listings
r = requests.get(url)
inner_soup = Soup(r.content)
try:
inner_script = json.loads(
inner_soup.find("script", type="application/ld+json",
text=re.compile("workExample")).text)
isbn = inner_script["workExample"]["isbn"]
except AttributeError:
isbn = ""
# END NEW CODE
writer.writerow([title, author, price, img, url, isbn])