Python IDNA标签为空或太长

我正在尝试运行一个在线课程的脚本，并且必须将源代码从Python2语法更改为Python3语法。在这个脚本中，下载了一个归档文件，我已经将其转换为：

url = "https://www.cs.cmu.edu/~./enron/enron_mail_20150507.tgz"
urllib.request.urlretrieve(url, filename="../enron_mail_20150507.tgz")

但是，URL似乎有问题，因为它给了我以下错误：

Traceback (most recent call last):
  File "/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/encodings/idna.py", line 165, in encode
    raise UnicodeError("label empty or too long")
UnicodeError: label empty or too long

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "ud120_code_py35fork/tools/startup.py", line 37, in <module>
    data = urllib.request.urlretrieve("http://...")
  File "/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/urllib/request.py", line 187, in urlretrieve
    with contextlib.closing(urlopen(url, data)) as fp:
  File "/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/urllib/request.py", line 162, in urlopen
    return opener.open(url, data, timeout)
  File "/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/urllib/request.py", line 465, in open
    response = self._open(req, data)
  File "/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/urllib/request.py", line 483, in _open
    '_open', req)
  File "/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/urllib/request.py", line 443, in _call_chain
    result = func(*args)
  File "/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/urllib/request.py", line 1268, in http_open
    return self.do_open(http.client.HTTPConnection, req)
  File "/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/urllib/request.py", line 1240, in do_open
    h.request(req.get_method(), req.selector, req.data, headers)
  File "/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/http/client.py", line 1083, in request
    self._send_request(method, url, body, headers)
  File "/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/http/client.py", line 1128, in _send_request
    self.endheaders(body)
  File "/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/http/client.py", line 1079, in endheaders
    self._send_output(message_body)
  File "/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/http/client.py", line 911, in _send_output
    self.send(msg)
  File "/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/http/client.py", line 854, in send
    self.connect()
  File "/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/http/client.py", line 826, in connect
    (self.host,self.port), self.timeout, self.source_address)
  File "/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/socket.py", line 693, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
  File "/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/socket.py", line 732, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
UnicodeError: encoding with 'idna' codec failed (UnicodeError: label empty or too long)

回溯（最近一次呼叫最后一次）：
文件“/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/encodings/idna.py”，第165行，在encode中
raise UnicodeError（“标签为空或太长”）
UnicodeError:标签为空或太长
上述异常是以下异常的直接原因：
回溯（最近一次呼叫最后一次）：
文件“ud120_code_py35fork/tools/startup.py”，第37行，在
data=urllib.request.urlretrieve（“http://...")
文件“/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/urllib/request.py”，urlretrieve中第187行
使用contextlib.closing（urlopen（url，data））作为fp:
文件“/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/urllib/request.py”，urlopen第162行
返回opener.open（url、数据、超时）
文件“/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/urllib/request.py”，第465行，打开
响应=自身打开（请求，数据）
文件“/home/xiaolong/development/Python/udacity\u machine\u learning/localpython/lib/python3.5/urllib/request.py”，第483行，打开
"开放",
文件“/home/xiaolong/development/Python/udacity\u机器学习简介/localpython/lib/python3.5/urllib/request.py”，第443行，在调用链中
结果=func（*args）
文件“/home/xiaolong/development/Python/udacity\u机器学习介绍/localpython/lib/python3.5/urllib/request.py”，第1268行，http\u open
返回self.do_open（http.client.HTTPConnection，req）
文件“/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/urllib/request.py”，第1240行，在do_open中
h、 请求（请求获取方法（），请求选择器，请求数据，标题）
文件“/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/http/client.py”，请求中的第1083行
self.\u发送请求（方法、url、正文、标题）
文件“/home/xiaolong/development/Python/udacity\u机器学习介绍/localpython/lib/python3.5/http/client.py”，第1128行，在发送请求中
self.endheaders（主体）
文件“/home/xiaolong/development/Python/udacity_intro_to_machine_learning/localpython/lib/python3.5/http/client.py”，第1079行，在endheaders中
自发送输出（消息体）
文件“/home/xiaolong/development/Python/udacity\u机器学习简介/localpython/lib/python3.5/http/client.py”，第911行，在发送输出中
self.send（msg）
文件“/home/xiaolong/development/Python/udacity\u机器学习介绍/localpython/lib/python3.5/http/client.py”，第854行，在send中
self.connect（）
文件“/home/xiaolong/development/Python/udacity\u intro\u to\u machine\u learning/localpython/lib/python3.5/http/client.py”，第826行，在connect中
（self.host、self.port）、self.timeout、self.source\u地址）
文件“/home/xiaolong/development/Python/udacity\u机器学习介绍/localpython/lib/python3.5/socket.py”，第693行，在create\u connection中
对于getaddrinfo（主机、端口、0、SOCK_流）中的res：
文件“/home/xiaolong/development/Python/udacity\u机器学习介绍/localpython/lib/python3.5/socket.py”，第732行，在getaddrinfo中
对于_socket.getaddrinfo（主机、端口、系列、类型、协议、标志）中的res：
UnicodeError:使用“idna”编解码器编码失败（UnicodeError:标签为空或太长）

我已经试着用

%7E

和

%2E

替换URL中的

~

和

，但这根本没有帮助

URL有什么问题，如何修复

• 确切的python版本：3.5.1

---

我使用3.5.0和3.4.3时，代码运行得非常好，您使用的是什么版本的python3？@Padraiccningham 3.5.1，将其添加到OP中