使用电子邮件模块（PYTHON）解析来自poplib的电子邮件内容 [英] parsing email contents from poplib with email module (PYTHON)

问题描述

PYTHON版本== 3.5

代码：

import getpass, poplib, email
Mailbox = poplib.POP3_SSL('pop.googlemail.com', '995')
Mailbox.user("[e-mail]")
Mailbox.pass_('password_here')
numMessages = len(Mailbox.list()[1])
for i in range(numMessages):
    info  = b" ".join(Mailbox.retr(i+1)[1])
    msg = email.message_from_bytes(info)
    print(msg.keys())

输出：

['MIME-Version']
['MIME-Version']
['MIME-Version']
['Delivered-To']
['Delivered-To']
['Delivered-To']
['Delivered-To']
['Delivered-To']
['Delivered-To']
['Delivered-To']
['Delivered-To']

输出不正确，因为应该除了 MIME-Version 和，
msg 中的其他字段已交付给 我认为

the output isn't correct because there should be more fields from the msg other than "MIME-Version" and "Delivered-To" I thought

em ail.message_from_bytes（）解析字节字符串的内容

email.message_from_bytes() parses the contents of a byte string

不是 msg

文档建议这样做：

M = poplib.POP3('localhost')
M.user(getpass.getuser())
M.pass_(getpass.getpass())
numMessages = len(M.list()[1])
for i in range(numMessages):
    for j in M.retr(i+1)[1]:
        print(j)

是否可以使用电子邮件模块解析返回的消息？
，以便我们可以存储电子邮件详细信息。像发件人，正文，标头等。

Is there a way to parse the returned message using the email module? so we can store the email details. like sender, body, header etc.

推荐答案

答案很简单

import getpass, poplib, email
Mailbox = poplib.POP3_SSL('pop.googlemail.com', '995')
Mailbox.user("[e-mail]")
Mailbox.pass_('password_here')
numMessages = len(Mailbox.list()[1])
for i in range(numMessages):
    raw_email  = b"\n".join(Mailbox.retr(i+1)[1])
    parsed_email = email.message_from_bytes(raw_email)
    print(parsed_email.keys())

而不是在 raw_email 中加入空格只需加入 \n 即可，电子邮件模块可以正确解析字段：

instead of joining raw_email with a space just join it by a \n and the email module can parse the fields correctly:

关于使用 email 模块
也是一件很棒的事情，当您调用 email.message_from_bytes（ ）返回的输出是
a dict

also an a awesome thing about using the email module is when you call email.message_from_bytes() the output returned is a dict

，因此您可以访问字段像这样：

so you access the fields like this:

raw_email  = b"\n".join(Mailbox.retr(i+1)[1])
parsed_email = email.message_from_bytes(raw_email)
print(parsed_email["header"])

但是如果该字段不存在怎么办？：

but what if the field doesn't exist?:

raw_email  = b"\n".join(Mailbox.retr(i+1)[1])
parsed_email = email.message_from_bytes(raw_email)
print(parsed_email["non-existent field"])

上面的代码将返回 None 且不抛出 KeyError

the above code will return None and not throw a KeyError

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