简单的电子邮件爬虫Python代码

import requests
import re
try:
    from urllib.parse import urljoin
except ImportError:
    from urlparse import urljoin
regex
email_re = re.compile(r'([\w.,]+@[\w.,]+.\w+)')
link_re = re.compile(r'href="(.*?)"')
def crawl(url):

result = set()

req = requests.get(url)

# Check if successful
if(req.status_code != 200):
    return []

# Find links
links = link_re.findall(req.text)

print("\nFound {} links".format(len(links)))

# Search links for emails
for link in links:

    # Get an absolute URL for a link
    link = urljoin(url, link)

    # Find all emails on current page
    result.update(email_re.findall(req.text))

return result


if name == 'main':
    emails = crawl('http://www.realpython.com')

print("\nScrapped e-mail addresses:")
for email in emails:
    print(email)
print("\n")</pre>