避免在抓取页面时复制某些内容
Avoid to copy some content while scraping through pages
我在保存正在抓取的结果时遇到了一些困难。
请参考此代码(此代码针对我的具体情况略有更改):
import bs4, requests
import pandas as pd
import re
import time
headline=[]
corpus=[]
dates=[]
tag=[]
start=1
url="https://www.imolaoggi.it/category/cron/"
while True:
r = requests.get(url)
soup = bs4.BeautifulSoup(r.text, 'html')
headlines=soup.find_all('h3')
corpora=soup.find_all('p')
dates=soup.find_all('time', attrs={'class':'entry-date published updated'})
tags=soup.find_all('span', attrs={'class':'cat-links'})
for t in headlines:
headline.append(t.text)
for s in corpora:
corpus.append(s.text)
for d in date:
dates.append(d.text)
for c in tags:
tag.append(c.text)
if soup.find_all('a', attrs={'class':'page-numbers'}):
url = f"https://www.imolaoggi.it/category/cron/page/{page}"
page +=1
else:
break
创建数据框
df = pd.DataFrame(list(zip(date, headline, tag, corpus)),
columns =['Date', 'Headlines', 'Tags', 'Corpus'])
我想保存此 link 中的所有页面。该代码有效,但似乎每次(即每一页)都为语料库编写两个相同的句子:
我认为这是因为我选择的标签:
corpora=soup.find_all('p')
这会导致我的数据框中的行错位,因为数据保存在列表中,并且语料库稍后开始正确抓取,如果与其他人相比。
希望您能帮忙了解如何修复它。
import requests
from bs4 import BeautifulSoup
from concurrent.futures import ThreadPoolExecutor
import pandas as pd
def main(req, num):
r = req.get("https://www.imolaoggi.it/category/cron/page/{}/".format(num))
soup = BeautifulSoup(r.content, 'html.parser')
goal = [(x.time.text, x.h3.a.text, x.select_one("span.cat-links").get_text(strip=True), x.p.get_text(strip=True))
for x in soup.select("div.entry-content")]
return goal
with ThreadPoolExecutor(max_workers=30) as executor:
with requests.Session() as req:
fs = [executor.submit(main, req, num) for num in range(1, 2937)]
allin = []
for f in fs:
allin.extend(f.result())
df = pd.DataFrame.from_records(
allin, columns=["Date", "Title", "Tags", "Content"])
print(df)
df.to_csv("result.csv", index=False)
你很接近,但你的选择器关闭了,你 mis-naned 你的一些变量。
我会像这样使用 css 选择器:
eadline=[]
corpus=[]
date_list=[]
tag_list=[]
headlines=soup.select('h3.entry-title')
corpora=soup.select('div.entry-meta + p')
dates=soup.select('div.entry-meta span.posted-on')
tags=soup.select('span.cat-links')
for t in headlines:
headline.append(t.text)
for s in corpora:
corpus.append(s.text.strip())
for d in dates:
date_list.append(d.text)
for c in tags:
tag_list.append(c.text)
df = pd.DataFrame(list(zip(date_list, headline, tag_list, corpus)),
columns =['Date', 'Headlines', 'Tags', 'Corpus'])
df
输出:
Date Headlines Tags Corpus
0 30 Ottobre 2020 Roma: con spranga di ferro danneggia 50 auto i... CRONACA, NEWS Notte di vandalismi a Colli Albani dove un uom...
1 30 Ottobre 2020\n30 Ottobre 2020 Aggressione con machete: grave un 28enne, arre... CRONACA, NEWS Roma - Ha impugnato il suo machete e lo ha agi...
2 30 Ottobre 2020\n30 Ottobre 2020 Deep State e globalismo, Mons. Viganò scrive a... CRONACA, NEWS LETTERA APERTA\r\nAL PRESIDENTE DEGLI STATI UN...
3 30 Ottobre 2020 Meluzzi e Scandurra: “Sacrificare libertà per ... CRONACA, NEWS "Sacrificare la libertà per la sicurezza è un ...
我在保存正在抓取的结果时遇到了一些困难。 请参考此代码(此代码针对我的具体情况略有更改):
import bs4, requests
import pandas as pd
import re
import time
headline=[]
corpus=[]
dates=[]
tag=[]
start=1
url="https://www.imolaoggi.it/category/cron/"
while True:
r = requests.get(url)
soup = bs4.BeautifulSoup(r.text, 'html')
headlines=soup.find_all('h3')
corpora=soup.find_all('p')
dates=soup.find_all('time', attrs={'class':'entry-date published updated'})
tags=soup.find_all('span', attrs={'class':'cat-links'})
for t in headlines:
headline.append(t.text)
for s in corpora:
corpus.append(s.text)
for d in date:
dates.append(d.text)
for c in tags:
tag.append(c.text)
if soup.find_all('a', attrs={'class':'page-numbers'}):
url = f"https://www.imolaoggi.it/category/cron/page/{page}"
page +=1
else:
break
创建数据框
df = pd.DataFrame(list(zip(date, headline, tag, corpus)),
columns =['Date', 'Headlines', 'Tags', 'Corpus'])
我想保存此 link 中的所有页面。该代码有效,但似乎每次(即每一页)都为语料库编写两个相同的句子:
我认为这是因为我选择的标签:
corpora=soup.find_all('p')
这会导致我的数据框中的行错位,因为数据保存在列表中,并且语料库稍后开始正确抓取,如果与其他人相比。
希望您能帮忙了解如何修复它。
import requests
from bs4 import BeautifulSoup
from concurrent.futures import ThreadPoolExecutor
import pandas as pd
def main(req, num):
r = req.get("https://www.imolaoggi.it/category/cron/page/{}/".format(num))
soup = BeautifulSoup(r.content, 'html.parser')
goal = [(x.time.text, x.h3.a.text, x.select_one("span.cat-links").get_text(strip=True), x.p.get_text(strip=True))
for x in soup.select("div.entry-content")]
return goal
with ThreadPoolExecutor(max_workers=30) as executor:
with requests.Session() as req:
fs = [executor.submit(main, req, num) for num in range(1, 2937)]
allin = []
for f in fs:
allin.extend(f.result())
df = pd.DataFrame.from_records(
allin, columns=["Date", "Title", "Tags", "Content"])
print(df)
df.to_csv("result.csv", index=False)
你很接近,但你的选择器关闭了,你 mis-naned 你的一些变量。
我会像这样使用 css 选择器:
eadline=[]
corpus=[]
date_list=[]
tag_list=[]
headlines=soup.select('h3.entry-title')
corpora=soup.select('div.entry-meta + p')
dates=soup.select('div.entry-meta span.posted-on')
tags=soup.select('span.cat-links')
for t in headlines:
headline.append(t.text)
for s in corpora:
corpus.append(s.text.strip())
for d in dates:
date_list.append(d.text)
for c in tags:
tag_list.append(c.text)
df = pd.DataFrame(list(zip(date_list, headline, tag_list, corpus)),
columns =['Date', 'Headlines', 'Tags', 'Corpus'])
df
输出:
Date Headlines Tags Corpus
0 30 Ottobre 2020 Roma: con spranga di ferro danneggia 50 auto i... CRONACA, NEWS Notte di vandalismi a Colli Albani dove un uom...
1 30 Ottobre 2020\n30 Ottobre 2020 Aggressione con machete: grave un 28enne, arre... CRONACA, NEWS Roma - Ha impugnato il suo machete e lo ha agi...
2 30 Ottobre 2020\n30 Ottobre 2020 Deep State e globalismo, Mons. Viganò scrive a... CRONACA, NEWS LETTERA APERTA\r\nAL PRESIDENTE DEGLI STATI UN...
3 30 Ottobre 2020 Meluzzi e Scandurra: “Sacrificare libertà per ... CRONACA, NEWS "Sacrificare la libertà per la sicurezza è un ...