Python 3.5.1无法下载Robot Framework库

我试图使用Robot Framework自动化测试 . 当我尝试通过 pip 下载库时，我遇到了一些问题 . 我正在使用 Python 3.5.1 ， Robot Framework 3.0 ， PyCharm 2016.1(64) ，

命令输出 pip install robotframework-selenium2library ： Collecting robotframework-selenium2library Using cached robotframework-selenium2library-1.7.4.tar.gz Complete output from command python setup.py egg_info: Downloading http://pypi.python.org/packages/source/d/distribute/distribute-0.6.14.tar.gz Extracting in C:\Users\Radek\AppData\Local\Temp\tmpooendh2g Traceback (most recent call last): File "c:\users\radek\appdata\local\programs\python\python35\lib\site-packages\ez_setup.py", line 143, in use_setuptools raise ImportError ImportError 在处理上述异常期间，发生了另一个异常：

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\Radek\AppData\Local\Temp\pip-build-gh4jw21a\robotframework-selenium2library\setup.py", line 8, in <module>
    use_setuptools()
  File "c:\users\radek\appdata\local\programs\python\python35\lib\site-packages\ez_setup.py", line 145, in use_setuptools
    return _do_download(version, download_base, to_dir, download_delay)
  File "c:\users\radek\appdata\local\programs\python\python35\lib\site-packages\ez_setup.py", line 125, in _do_download
    _build_egg(egg, tarball, to_dir)
  File "c:\users\radek\appdata\local\programs\python\python35\lib\site-packages\ez_setup.py", line 99, in _build_egg
    _extractall(tar)
  File "c:\users\radek\appdata\local\programs\python\python35\lib\site-packages\ez_setup.py", line 467, in _extractall
    self.chown(tarinfo, dirpath)
TypeError: chown() missing 1 required positional argument: 'numeric_owner'

----------------------------------------

命令“python setup.py egg_info”失败，错误代码1在C：\ Users \ Radek \ AppData \ Local \ Temp \ pip-build-gh4jw21a \ robotframework-selenium2library \

Setuptools是最新的，ez_setup也是如此

C:\Users\Radek>pip install --upgrade setuptools Requirement already up-to-date: setuptools in c:\users\radek\appdata\local\programs\python\python35\lib\site-packages C:\Users\Radek>pip install ez_setup Requirement already satisfied (use --upgrade to upgrade): ez-setup in c:\users\radek\appdata\local\programs\python\python35\lib\site-packages