anaconda3安装在linux上。
使用conda安装了几个模块。它们是可见的：
(cytogen) jeanpat@10TS-Notebook:~$ conda list
# packages in environment at /home/jeanpat/anaconda3/envs/cytogen:
#
boost 1.64.0 py36_4 conda-forge
boost-cpp 1.64.0 1 conda-forge
bzip2 1.0.6 1 conda-forge
ca-certificates 2017.08.26 h1d4fec5_0
...
graph-tool 2.25 py36hbffa022_0 ostrokach-forge
hdf5 1.8.17 2
mahotas 1.4.4 py36_0 conda-forge
mkl 2018.0.0 hb491cac_4
mpfr 3.1.5 0 conda-forge
ncurses 6.0 h9df7e31_2
numpy 1.12.1 py36he24570b_1
opencv 3.1.0 np112py36_1
opencv3 3.1.0 py36_0 menpo
openssl 1.0.2m h8cfc7e7_0
pandas 0.21.0 py36_0 conda-forge
pillow 3.4.2 py36_0
pip 9.0.1 py36h6c6f9ce_4
...
pytorch 0.2.0 py36hf0d2509_4cu75 soumith
pytz 2017.3 py_2 conda-forge
readline 7.0 ha6073c6_4
scipy 1.0.0 py36hbf646e7_0
setuptools 36.5.0 py36he42e2e1_0
six 1.11.0 py36_1 conda-forge
sparsehash 2.0.3 0 conda-forge
sqlite 3.20.1 hb898158_2
tk 8.6.7 hc745277_3
torchvision 0.1.9 py36h7584368_1 soumith
wheel 0.29.0 py36he7f4e38_1
xz 5.2.3 h55aa19d_2
zlib 1.2.11 ha838bed_2
启动ipython后，某些模块无法导入（cv2，mahotas ......）：
~$ ipython
Python 3.6.3 |Anaconda, Inc.| (default, Oct 13 2017, 12:02:49)
Type 'copyright', 'credits' or 'license' for more information
IPython 6.1.0 -- An enhanced Interactive Python. Type '?' for help.
In [1]: import mahotas
---------------------------------------------------------------------------
ModuleNotFoundError Traceback (most recent call last)
<ipython-input-1-adadab8066d2> in <module>()
----> 1 import mahotas
ModuleNotFoundError: No module named 'mahotas'
In [2]: import cv2
---------------------------------------------------------------------------
ModuleNotFoundError Traceback (most recent call last)
<ipython-input-2-72fbbcfe2587> in <module>()
----> 1 import cv2
ModuleNotFoundError: No module named 'cv2'
我想这是一个路径问题，例如导入numpy作品：
In [3]: import numpy
In [4]: numpy.__version__
Out[4]: '1.13.3'
但该版本与virtualenv的numpy版本不匹配。