python正确下载ftp文件

Question

我正试图在内存中编写一个类似文件的对象。我在ftp上下载了一个文件，当我试图使用read方法将其转换为StringIO或BytesIO对象时，我得到的是：

"Android 4.2.2 Google Play 4 GB Bluetooth Dubbele sim & dubbele stand-by Simlockvrij Scherm: 4.0"" OLED nHD multi-touch Processor: Dual-Core Cortex A7 1,3 GHz Mobiele data/3G: HSDPA 7.2 Mbps / HSUPA";90,720000;3,00000000;,00000000;1,00000000;;ANDROID e ACCESSORI;SMARTPHONE e LED e PRODOTTI COOL;ACCESSORI TABLET e SMARTPHONE;,1100000000;,2000000000;,1000000000;1,0000000000;https://x-yasmp40200_u.jpg;https://x2/00000000000000005268-art-icol-yasmp40200_u.jpg;888888888;2,00000000rn'

这是代码：

with closing(request.urlopen("ftp://{}:{}@ftp.url/file.csv".format(USERNAME, PASSWORD))) as r:
b = io.BytesIO(r.read())
print(b.read())

为什么字符\r\n被转换为字符串，并且'char'被转义了？如何正确获取文件内容？

Answer 1

我发现正确的编码格式是iso-8859-1:

b = io.BytesIO()
b.write(r.read())
b.seek(0)
lines = [line.decode("iso-8859-1") for line in b.readlines()]
csvr = csv.reader(lines, delimiter=';')
for row in csvr:
print(row)
break