How to set up Python path?

Question

I have uninstall anaconda2. but now when I run Python command in terminal it says "bash: /home/user/anaconda2/python: No such file or directory" now how can I set to Python when I have python 2.7 in "/usr/lib" .

Answer 1

I'm assuming that when you installed anaconda 2, you manually set the PYTHONPATH environment variable, by putting something like

PYTHONPATH=/home/user/anaconda2/python
export PYTHONPATH

in your .bash_profile or .bash_rc.

But since you deleted the /home/user/anacanda2/ directory, that path no longer exists.

Thus you want to change PYTHONPATH to point to the executable in /usr/lib, by changing the above to

PYTHONPATH=/usr/lib/my_python_distribution
export PYTHON

Answer 2

1. execute the command: echo $PATH

   root1@master:/usr/lib/python2.7$ echo $PATH
   /home/root1/anaconda3/bin:/home/root1/NAI/Execution/HDE/x86_64.linux/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/home/root1/java/jdk1.8.0_74/bin:/usr/lib/jvm/java-8-oracle/bin:/usr/lib/jvm/java-8-oracle/db/bin:/usr/lib/jvm/java-8-oracle/jre/bin:/home/root1/NAI/hadoop-2.7.3/bin
   

2. Remove your anaconda3 from your path variable that is

   /home/root1/anaconda3/bin:
   

3. Again set PATH variable with remaining information like below

   export PATH=/home/root1/NAI/Execution/HDE/x86_64.linux/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/home/root1/java/jdk1.8.0_74/bin:/usr/lib/jvm/java-8-oracle/bin:/usr/lib/jvm/java-8-oracle/db/bin:/usr/lib/jvm/java-8-oracle/jre/bin:/home/root1/NAI/hadoop-2.7.3/bin
   

4. Execute python command and should redirect to your python interpreter

   root1@master:/usr/lib/python2.7$ python
   Python 2.7.14 (default, Sep 18 2017, 00:00:00) 
   [GCC 4.8.4] on linux2
   Type "help", "copyright", "credits" or "license" for more information.
   >>> 
   

Answer 3

Add following top your ~/.bashrc and it should work

PYTHONPATH="path1:path2:$PYTHONPATH"

export PYTHONPATH

Replace path1, path2 with full path to your work directories

Answer 4

If you are just looking for python interpreter and want it to include in your script then just find the python binary path by the command which python and use that path.

For troubleshooting and setting PYTHONPATH see this link:

https://stackoverflow.com/questions/18247333/python-pythonpath-in-linux