jupyter finds wrong python binary with conda about jupyter_core HOT 1 OPEN

conda update -n root conda
conda update --all

/home/dun280/Dropbox/learning/python-anaconda/placer/placer/Feature extraction
tamar:  echo $PATH
/home/dun280/local/anaconda3/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games
tamar: which jupyter
/home/dun280/local/anaconda3/bin/jupyter
tamar: which python
/home/dun280/local/anaconda3/bin/python
tamar: python --version
Python 3.6.5
tamar: source activate placer-env
(placer-env) tamar:  echo $PATH
/home/dun280/local/anaconda3/envs/placer-env/bin:/home/dun280/local/anaconda3/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games
(placer-env) tamar: which jupyter
/home/dun280/local/anaconda3/envs/placer-env/bin/jupyter
(placer-env) tamar: which python
/home/dun280/local/anaconda3/envs/placer-env/bin/python
(placer-env) tamar: python --version
Python 3.6.5
(placer-env) tamar: jupyter kernelspec list
Available kernels:
  python3    /home/dun280/local/anaconda3/envs/placer-env/share/jupyter/kernels/python3
(placer-env) tamar: jupyter console
Jupyter console 5.2.0
Python 3.6.5 | packaged by conda-forge | (default, Apr  6 2018, 13:39:56) 
Type 'copyright', 'credits' or 'license' for more information
IPython 6.4.0 -- An enhanced Interactive Python. Type '?' for help.
In [1]: import pandas as pd
In [2]: import fiona, fiona.crs
---------------------------------------------------------------------------
ModuleNotFoundError                       Traceback (most recent call last)
<ipython-input-2-c04c0287504e> in <module>()
----> 1 import fiona, fiona.crs

ModuleNotFoundError: No module named 'fiona'

(placer-env) tamar: python
Python 3.6.5 | packaged by conda-forge | (default, Apr  6 2018, 13:39:56) 
[GCC 4.8.2 20140120 (Red Hat 4.8.2-15)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import pandas as pd
>>> import fiona, fiona.crs
>>>