在Python中,遍历每个页面以获取所有记录通常涉及到网页抓取(Web Scraping)或API数据获取。网页抓取是指从网页中提取数据的过程,而API数据获取则是通过调用应用程序接口(API)来获取数据。
requests
和BeautifulSoup
来解析HTML页面并提取数据。requests
库调用API接口获取JSON格式的数据。import requests
from bs4 import BeautifulSoup
def scrape_page(url):
response = requests.get(url)
if response.status_code == 200:
soup = BeautifulSoup(response.content, 'html.parser')
# 假设我们要提取所有的标题
titles = soup.find_all('h2', class_='title')
for title in titles:
print(title.text)
else:
print(f"Failed to retrieve data from {url}")
# 遍历多个页面
urls = ['http://example.com/page1', 'http://example.com/page2', 'http://example.com/page3']
for url in urls:
scrape_page(url)
import requests
def get_data_from_api(api_url):
response = requests.get(api_url)
if response.status_code == 200:
data = response.json()
for record in data['records']:
print(record)
else:
print(f"Failed to retrieve data from {api_url}")
# 调用API获取数据
api_url = 'http://api.example.com/data'
get_data_from_api(api_url)
通过以上方法,你可以有效地遍历每个页面以获取所有记录,并解决常见的技术问题。
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