在给定url的情况下，从网页获取元信息？

import requests
from bs4 import BeautifulSoup

def get_metadata_from_url(url):
    # 发起HTTP请求
    response = requests.get(url)
    
    # 获取网页内容
    html_content = response.text
    
    # 解析HTML
    soup = BeautifulSoup(html_content, 'html.parser')
    
    # 提取元信息
    title = soup.title.string.strip() if soup.title else ''
    description = soup.find('meta', attrs={'name': 'description'})
    description = description['content'].strip() if description else ''
    keywords = soup.find('meta', attrs={'name': 'keywords'})
    keywords = keywords['content'].strip() if keywords else ''
    
    # 清洗和处理
    # 可以根据具体需求对元信息进行进一步处理
    
    # 返回元信息
    metadata = {
        'title': title,
        'description': description,
        'keywords': keywords
    }
    return metadata

# 示例用法
url = 'https://example.com'
metadata = get_metadata_from_url(url)
print(metadata)