在OS X上安装PyQt5会崩溃

Question

尝试在我的工作笔记本电脑上安装PyQt5。当我尝试pip3 search PyQt时，我得到了

Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python3.4/site-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/usr/local/lib/python3.4/site-packages/pip/commands/search.py", line 43, in run
    pypi_hits = self.search(query, options)
  File "/usr/local/lib/python3.4/site-packages/pip/commands/search.py", line 60, in search
    hits = pypi.search({'name': query, 'summary': query}, 'or')
  File "/usr/local/Cellar/python3/3.4.3_2/Frameworks/Python.framework/Versions/3.4/lib/python3.4/xmlrpc/client.py", line 1098, in __call__
    return self.__send(self.__name, args)
  File "/usr/local/Cellar/python3/3.4.3_2/Frameworks/Python.framework/Versions/3.4/lib/python3.4/xmlrpc/client.py", line 1437, in __request
    verbose=self.__verbose
  File "/usr/local/lib/python3.4/site-packages/pip/download.py", line 767, in request
    return self.parse_response(response.raw)
  File "/usr/local/Cellar/python3/3.4.3_2/Frameworks/Python.framework/Versions/3.4/lib/python3.4/xmlrpc/client.py", line 1327, in parse_response
    return u.close()
  File "/usr/local/Cellar/python3/3.4.3_2/Frameworks/Python.framework/Versions/3.4/lib/python3.4/xmlrpc/client.py", line 657, in close
    raise Fault(**self._stack[0])
xmlrpc.client.Fault: :'_pypi_hidden'">

如果我尝试pip3 install PyQt5，我会

Collecting PyQt5
  Could not find a version that satisfies the requirement PyQt5 (from versions: )
No matching distribution found for PyQt5

PyQt文档明确指出这应该有效。难道我做错了什么？我的小伙子坏了吗？发生了什么事？