我在Windows
10上运行Python2.7，使用Anaconda进行环境和大多数pkg管理。升级了许多软件包后，我的ipython控制台现在无法在任何IDE或控制台中启动。当我尝试在控制台上运行它时，出现此错误：

Traceback (most recent call last):
File "C:\Anaconda3\Scripts\ipython-script.py", line 3, in <module>
import IPython
File "C:\Anaconda3\lib\site-packages\IPython\__init__.py", line 48, in  <module>
from .core.application import Application
File "C:\Anaconda3\lib\site-packages\IPython\core\application.py", line 24, in <module>
from IPython.core import release, crashhandler
File "C:\Anaconda3\lib\site-packages\IPython\core\crashhandler.py", line 28, in <module>
from IPython.core import ultratb
File "C:\Anaconda3\lib\site-packages\IPython\core\ultratb.py", line 121, in <module>
from IPython.utils.terminal import get_terminal_size
File "C:\Anaconda3\lib\site-packages\IPython\utils\terminal.py", line 27, in <module>
import backports.shutil_get_terminal_size
ImportError: No module named backports.shutil_get_terminal_size

我尝试做的第一件事是：

pip install --upgrade backports.shutil_get_terminal_size

输出：

Requirement already up-to-date: backports.shutil_get_terminal_size in c:\anaconda3\lib\site-packages

我已经卸载并重新安装了ipython

conda uninstall ipython
conda install ipython

和

pip uninstall ipython
pip install ipython

仍然行不通。请帮忙！