使用Python的email包来解析邮件、转码、解析附件和解析HTML以获取图片

使用Python的email包来解析邮件、转码、解析附件和解析HTML以获取图片。如何使用email包来解析邮件、转码内容、解析附件和提取HTML中的图片链接：

import email
import base64
import quopri
from bs4 import BeautifulSoup

def decode_payload(payload, encoding):
    if encoding == 'base64':
        return base64.b64decode(payload)
    elif encoding == 'quoted-printable':
        return quopri.decodestring(payload).decode('utf-8')
    else:
        return payload

def parse_email_message(message):
    msg = email.message_from_string(message)

    for part in msg.walk():
        if part.get_content_maintype() == 'multipart':
            continue
        content_type = part.get_content_type()
        content_disposition = str(part.get('Content-Disposition'))

        if 'attachment' in content_disposition:
            filename = part.get_filename()
            if filename:
                with open(filename, 'wb') as f:
                    f.write(part.get_payload(decode=True))
        else:
            payload = part.get_payload()
            encoding = part.get('Content-Transfer-Encoding')
            decoded_payload = decode_payload(payload, encoding)

            if content_type == 'text/html':
                soup = BeautifulSoup(decoded_payload, 'html.parser')
                images = soup.find_all('img')
                for img in images:
                    print(img['src'])

with open('email.eml', 'r') as file:
    email_message = file.read()
    parse_email_message(email_message)