Pip 抛出 TypeError: parse()在尝试安装新包时获得了一个意外的关键字参数‘ Transport_coding’

我正在使用最新版本的 Anaconda3。我刚刚安装的，我试图下载一些软件包。我正在使用水蟒提示符。在尝试使用 pip 做任何事情(包括升级现有的软件包)时，我得到了下面的回溯。

    Exception:
Traceback (most recent call last):
File "C:\Users\csprock\Anaconda3\lib\site-packages\pip\basecommand.py", line 215, in main
status = self.run(options, args)
File "C:\Users\csprock\Anaconda3\lib\site-packages\pip\commands\install.py", line 335, in run
wb.build(autobuilding=True)
File "C:\Users\csprock\Anaconda3\lib\site-packages\pip\wheel.py", line 749, in build
self.requirement_set.prepare_files(self.finder)
File "C:\Users\csprock\Anaconda3\lib\site-packages\pip\req\req_set.py", line 380, in prepare_files
ignore_dependencies=self.ignore_dependencies))
File "C:\Users\csprock\Anaconda3\lib\site-packages\pip\req\req_set.py", line 487, in _prepare_file
req_to_install, finder)
File "C:\Users\csprock\Anaconda3\lib\site-packages\pip\req\req_set.py", line 428, in _check_skip_installed
req_to_install, upgrade_allowed)
File "C:\Users\csprock\Anaconda3\lib\site-packages\pip\index.py", line 465, in find_requirement
all_candidates = self.find_all_candidates(req.name)
File "C:\Users\csprock\Anaconda3\lib\site-packages\pip\index.py", line 423, in find_all_candidates
for page in self._get_pages(url_locations, project_name):
File "C:\Users\csprock\Anaconda3\lib\site-packages\pip\index.py", line 568, in _get_pages
page = self._get_page(location)
File "C:\Users\csprock\Anaconda3\lib\site-packages\pip\index.py", line 683, in _get_page
return HTMLPage.get_page(link, session=self.session)
File "C:\Users\csprock\Anaconda3\lib\site-packages\pip\index.py", line 811, in get_page
inst = cls(resp.content, resp.url, resp.headers)
File "C:\Users\csprock\Anaconda3\lib\site-packages\pip\index.py", line 731, in __init__
namespaceHTMLElements=False,
TypeError: parse() got an unexpected keyword argument 'transport_encoding'

有什么想法吗? (这个问题是在我安装了张量流之后才出现的)谢谢。