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我有一个PubMed ID的数据集(一个CSV文件),需要对它进行迭代,并且每个数据集都获得标题,发布年份,抽象和MeSH条款,然后我需要将其保存为CSV具有以下格式的文件:使用bs4的Scarping PubMed
id year_published title abstract mesh_terms
其中每个项目位于不同的单独列中。 我试图使用BS4做到这一点,写了这个:
import urllib2
from bs4 import BeautifulSoup
import csv
CSVfile = open('srData.csv')
fileReader = csv.reader(CSVfile)
Data = list(fileReader)
i = 0
with open('blank.csv','wb') as f1:
writer=csv.writer(f1, delimiter='\t',lineterminator='\n',)
for id in Data:
try:
soup = BeautifulSoup(urllib2.urlopen("http://www.ncbi.nlm.nih.gov/pubmed/" & id).read())
jouryear = soup.find_all(attrs={"class": "cit"})
year = jouryear[0].get_text()
yearlength = len(year)
titleend = year.find(".")
year1 = titleend+2
year2 = year1+1
year3 = year2+1
year4 = year3+1
year5 = year4+1
published_date = (year[year1:year5])
title = soup.find_all(attrs={"class": "rprt abstract"})
title = (title[0].h1.string)
abstract = (soup.find_all(attrs={"class": "abstr"}))
abstract = (abstract[0].p.string)
writer.writerow([id, published_date, title, abstract])
except:
writer.writerow([id, "error"])
print (id)
i = i+1
print i
然而,这将引发错误关于追加一个列表的URL。我怎样才能解决这个问题。