我正在使用一个小的Python函数从clinicalTrials.gov抓取数据。我希望从每份研究记录中抓取该研究针对的条件。例如，对于this研究记录，我需要以下内容：
conditions = ['Rhinoconjunctivitis', 'Rhinitis', 'Conjunctivitis'. 'Allergy']
但是，在每个研究记录中，条件的数量都不同。我编写了以下脚本来获取数据：
page = requests.get('https://clinicaltrials.gov/ct2/show/study/NCT00550550')
soup = BeautifulSoup(page.text, 'html.parser')
studyDesign = soup.find_all(headers='studyInfoColData')
condition = soup.find(attrs={'class':'data_table'}).find_all('span')
for each in condition:
print(each.text.encode('utf-8').strip())
像这样：
b'Condition or disease'
b'Intervention/treatment'
b'Phase'
b'Rhinoconjunctivitis'
b'Rhinitis'
b'Conjunctivitis'
b'Allergy'
b'Drug: Placebo'
b'Biological: SCH 697243'
b'Drug: Loratadine Syrup 1 mg/mL Rescue Treatment'
b'Drug: Loratadine 10 mg Rescue Treatment'
b'Drug: Olopatadine 0.1% Rescue Treatment'
b'Drug: Mometasone furoate 50 mcg Rescue Treatment'
b'Drug: Albuterol 108 mcg Rescue Treatment'
b'Drug: Fluticasone 44 mcg Rescue Treatment'
b'Drug: Prednisone 5 mg Rescue Treatment'
b'Phase 3'
现在如何只获得没有干预/治疗信息的疾病？
最佳答案
您可以将第一个table与类data_table一起使用，并在span中提取td元素：
import requests
from bs4 import BeautifulSoup
page = requests.get('https://clinicaltrials.gov/ct2/show/study/NCT00550550')
soup = BeautifulSoup(page.text, 'html.parser')
studyDesign = soup.find("table", {"class" : "data_table"}).find('td')
conditions = [ t.text.strip() for t in studyDesign.find_all('span') ]
print(conditions)
这使 ：
[u'Rhinoconjunctivitis', u'Rhinitis', u'Conjunctivitis', u'Allergy']