Python;如何用各自的 'real' utf-8 替换转义的非 unicode 字符

Question

我对编程还比较陌生，我在为 ubuntu(linux) 的 spotify 编写一个相当于 Snip 的 python 时遇到了一个小问题我可以通过某种方式正确编码标题，但无法以相同的方式对艺术家进行编码

当我尝试以相同的方式对艺术家进行编码时，我得到了这个:

File "./songfinder.py", line 11, in currentplaying
    artiststr = str((metadata['xesam:artist']).encode('utf-8'))
AttributeError: 'dbus.Array' object has no attribute 'encode'

但是标题完全相同并且有效。

目前的代码是有效的，但有例如\xd8 而不是 Ø，以及类似的:

import dbus
session_bus = dbus.SessionBus()
spotify_bus = session_bus.get_object("org.mpris.MediaPlayer2.spotify", "/org/mpris/MediaPlayer2")
spotify_properties = dbus.Interface(spotify_bus, "org.freedesktop.DBus.Properties")

def currentplaying():
    metadata = spotify_properties.Get("org.mpris.MediaPlayer2.Player", "Metadata")
    title =  str((metadata['xesam:title']).encode('utf-8'))
    artiststr = str((metadata['xesam:artist']))
    if ("dbus.string" in artiststr.lower()):
        artists = artiststr.split("(u")
        artist = artists[1]
        artists = artist.split(")],")
        artist = artists[0]
        artist = artist.replace("(u", "")
    else:
        artist = "'unknown'"

    artist = (artist.replace("'",""))

    playing = (artist + " - " + title + "             ")
    return playing

#save playing to file.txt

相关问题: Replace non-ascii chars from a unicode string in Python

为什么它不能解决我的问题:我想打印/保存实际的字符，而不是用类似的替换它

Answer 1

看看你的问题 metadata 至少包含类似这样的 Unicode 字符串。艺术家领域似乎是某种可迭代的，从艺术家开始。像这样的东西(随意发布实际的元数据内容):

metadata = {'xesam:title':u'title','xesam:artist':[u'artist']}

在 title 分配行中，str 是不必要的，因为编码 Unicode 字符串无论如何都会返回 str，但也不需要对其进行编码. Unicode 字符串表示文本，所以就这样吧:

title =  metadata['xesam:title']

类似于 artist 赋值，但获取可迭代对象的第一个元素:

artist = metadata['xesam:artist'][0]

接下来，在您的歌曲更新逻辑中，使用 io.open 打开 UTF-8 编码的文件。这允许直接写入 Unicode 字符串(文本)，文件将处理编码。还可以使用 with 语句在 with 结束时自动关闭文件。

具有建议更改的程序:

import time
import dbus
import io
session_bus = dbus.SessionBus()
spotify_bus = session_bus.get_object("org.mpris.MediaPlayer2.spotify", "/org/mpris/MediaPlayer2")
spotify_properties = dbus.Interface(spotify_bus, "org.freedesktop.DBus.Properties")

def currentplaying():
    metadata = spotify_properties.Get("org.mpris.MediaPlayer2.Player", "Metadata")
    title =  metadata['xesam:title']
    artist = metadata['xesam:artist'][0]
    playing = artist + " - " + title + "             "
    return playing

while True:
    with io.open('currentsongspotify.txt', encoding='utf8') as filetxt:
        oldtitle = filetxt.read()
    newtitle = currentplaying()
    if newtitle == oldtitle:
        time.sleep(1)
    else:
        with io.open('currentsongspotify.txt','w',encoding='utf8') as filetxt: # save newtitle to file, overwriting existing data
            filetxt.write(newtitle)
        print 'new file saved:',newtitle