我正在尝试在创建的虚拟环境中安装新模块。我在ubuntu服务器上安装了带有anaconda的python。我创建了一个名为env_zipline的环境。现在，我试图通过pip安装名为deepdow的模块，因为它无法通过conda获得。当我尝试下面的代码时，出现以下错误。有人知道这个问题可能是什么，并建议我如何解决这个问题？
代码：
pip install deepdow
错误：
Traceback (most recent call last):
File "/home/username/anaconda3/envs/env_zipline/bin/pip", line 7, in <module>
from pip._internal import main
File "/home/username/anaconda3/envs/env_zipline/lib/python3.5/site-packages/pip/_internal/__init__.py", line 42, in <module>
from pip._internal import cmdoptions
File "/home/username/anaconda3/envs/env_zipline/lib/python3.5/site-packages/pip/_internal/cmdoptions.py", line 16, in <module>
from pip._internal.index import (
ImportError: cannot import name 'FormatControl'
也尝试过：
conda install python pip3
错误：
Collecting package metadata: done
Solving environment: failed
PackagesNotFoundError: The following packages are not available from current channels:
- pip3
Current channels:
- https://repo.anaconda.com/pkgs/main/linux-64
- https://repo.anaconda.com/pkgs/main/noarch
- https://repo.anaconda.com/pkgs/free/linux-64
- https://repo.anaconda.com/pkgs/free/noarch
- https://repo.anaconda.com/pkgs/r/linux-64
- https://repo.anaconda.com/pkgs/r/noarch
To search for alternate channels that may provide the conda package you're
looking for, navigate to
https://anaconda.org
and use the search bar at the top of the page.
代码：
/home/username/anaconda3/envs/env_zipline/bin/pip install deepdow
错误：
Traceback (most recent call last):
File "/home/username/anaconda3/envs/env_zipline/bin/pip", line 7, in <module>
from pip._internal import main
File "/home/username/anaconda3/envs/env_zipline/lib/python3.5/site-packages/pip/_internal/__init__.py", line 42, in <module>
from pip._internal import cmdoptions
File "/home/username/anaconda3/envs/env_zipline/lib/python3.5/site-packages/pip/_internal/cmdoptions.py", line 16, in <module>
from pip._internal.index import (
ImportError: cannot import name 'FormatControl'