61、Python 中的邮件处理、二进制编码与 HTML 解析

Python 中的邮件处理、二进制编码与 HTML 解析

1. 邮件处理

1.1 邮件解包

在 Python 中，我们可以使用以下代码将邮件消息的各个部分解包到指定目录：

import os, email
def unpack_mail(mail_file, dest_dir):
    ''' Given file object mail_file, open for reading, and dest_dir, a
        string that is a path to an existing, writable directory, 
        unpack each part of the mail message from mail_file to a 
        file within dest_dir.
    '''
    with mail_file:
        msg = email.message_from_file(mail_file)
    for part_number, part in enumerate(msg.walk()):
        if part.get_content_maintype() == 'multipart':
            # we'll get each specific part later in the loop,
            # so, nothing to do for the 'multipart' itself
            continue
        dest = par