Python字符串中的特殊字符

Question

我正在尝试在网页上显示电子邮件。这个程序是用Python写的。不过，我遇到了一些字符编码的问题。文本中有单引号和双引号。

原始邮件内容：

“All is good”
‘it is getting better’

使用字符集 'windows-1252' 从互联网服务提供商那里得到的内容：

=93All is good=94
=91it is getting better=92

使用字符集 'utf-8' 从互联网服务提供商那里得到的内容：

=E2=80=9CAll is good=E2=80=9D
=E2=80=98it is getting better=E2=80=99

我把 =.. 替换成它们对应的十六进制字符。然后文本看起来像：

character set 'windows-1252'
ôAll is goodö
æit is getting betterÆ


character set 'utf-8'
ΓÇ£All is goodΓÇ¥
ΓÇÿit is getting betterΓÇÖ

后续调用unicode函数时出现错误：

UnicodeEncodeError: 'charmap' codec can't encode character u'\u201d' in position 6: 
character maps to <undefined>

或者类似的错误。

这个调用看起来像 unicode( message, 'utf-8', 'replace' )。你觉得我哪里做错了吗？

Answer 1

因为我试过这个，但遇到了一些问题。这里是另一个尝试：

输出看起来像这样：

# lines is already prefilled with a valid HTML message
m = email.message_from_string( lines );
email.iterators._structure( m );
print m.is_multipart();
print m.get_payload( decode=True );
print m.get_payload();

输出看起来像这样：

>>> execfile( 'email2.py' )
multipart/alternative
     text/plain
     text/html
True
None
[<email.message.Message instance at 0x0235FDF0>, <email.message.Message instance at 0x02355F08>]

你看，如果我使用 decode='true'，就会失败。这里是简化后的邮件内容：

Content-Type: multipart/alternative;
    boundary="----=_NextPart_000_0130_01CC1E30.41026040"

This is a multi-part message in MIME format.

------=_NextPart_000_0130_01CC1E30.41026040
Content-Type: text/plain;
    charset="utf-8"
Content-Transfer-Encoding: quoted-printable

plain

------=_NextPart_000_0130_01CC1E30.41026040
Content-Type: text/html;
    charset="utf-8"
Content-Transfer-Encoding: quoted-printable

html

------=_NextPart_000_0130_01CC1E30.41026040--

Answer 2

你为什么要用某个东西去替换另一个东西呢？

>>> m = email.message_from_string('''Content-Type: text/plain; utf-8\nContent-Transfer-Encoding: quoted-printable\n\n=E2=80=9CAll is good=E2=80=9D\n=E2=80=98it is getting better=E2=80=99''')
>>> m.get_payload(decode=True).decode(m['Content-Type'].split('; ')[1])u'\u201cAll is good\u201d\n\u2018it is getting better\u2019'