迭代项目列表并从web浏览器中提取列表的数据，然后将数据框追加为最终输出

import requests
from bs4 import BeautifulSoup
import pandas as pd

# 假设我们要抓取的项目列表在一个网页上
url = 'http://example.com/projects'

# 发送HTTP请求
response = requests.get(url)
html_content = response.content

# 解析HTML内容
soup = BeautifulSoup(html_content, 'html.parser')

# 假设项目列表在一个class为'project-list'的ul标签中
projects = soup.find('ul', class_='project-list').find_all('li')

# 提取数据并保存到DataFrame
data = []
for project in projects:
    title = project.find('h2').text
    description = project.find('p').text
    data.append([title, description])

df = pd.DataFrame(data, columns=['Title', 'Description'])

# 将DataFrame追加到最终输出文件
output_file = 'projects_output.csv'
df.to_csv(output_file, mode='a', header=not pd.io.common.file_exists(output_file), index=False)