The environment variable PYTHONPATH is actually only added to the list of locations Python searches for modules. You can print out the full list in the terminal like this:
python -c "import sys; print(sys.path)"
Or if want the output in the UNIX directory list style (separated by :) you can do this:
python -c "import sys; print(':'.join(x for x in sys.path if x))"
Which will output something like this:
/usr/local/lib/python2.7/dist-packages/feedparser-5.1.3-py2.7.egg:/usr/local/lib/ python2.7/dist-packages/stripogram-1.5-py2.7.egg:/home/qiime/lib:/home/debian:/us r/lib/python2.7:/usr/lib/python2.7/plat-linux2:/usr/lib/python2.7/lib-tk:/usr/lib /python2.7/lib-old:/usr/lib/python2.7/lib- dynload:/usr/local/lib/python2.7/dist- packages:/usr/lib/python2.7/dist-packages:/usr/lib/python2.7/dist-packages/PIL:/u sr/lib/python2.7/dist-packages/gst-0.10:/usr/lib/python2.7/dist-packages/gtk-2.0: /usr/lib/pymodules/python2.7Answer from Hubro on Stack Overflow
The environment variable PYTHONPATH is actually only added to the list of locations Python searches for modules. You can print out the full list in the terminal like this:
python -c "import sys; print(sys.path)"
Or if want the output in the UNIX directory list style (separated by :) you can do this:
python -c "import sys; print(':'.join(x for x in sys.path if x))"
Which will output something like this:
/usr/local/lib/python2.7/dist-packages/feedparser-5.1.3-py2.7.egg:/usr/local/lib/ python2.7/dist-packages/stripogram-1.5-py2.7.egg:/home/qiime/lib:/home/debian:/us r/lib/python2.7:/usr/lib/python2.7/plat-linux2:/usr/lib/python2.7/lib-tk:/usr/lib /python2.7/lib-old:/usr/lib/python2.7/lib- dynload:/usr/local/lib/python2.7/dist- packages:/usr/lib/python2.7/dist-packages:/usr/lib/python2.7/dist-packages/PIL:/u sr/lib/python2.7/dist-packages/gst-0.10:/usr/lib/python2.7/dist-packages/gtk-2.0: /usr/lib/pymodules/python2.7
Just write:
just write which python in your terminal and you will see the python path you are using.
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First question:
which python though its usually /usr/bin/python for the 2.7
Second question:
From a terminal & python2.7: python2.7 yourfile.py.
Simailarly for 3.2: python3.2 yourfile.py though 3.2 isn't installed by default. (You can apt-get install python3.2.)
What python yourfile.py will do depends on which alternative is used for your python interpreter. You can change that by issuing update-alternatives python as root (or by using su).
Third question:
Environment variables are shell dependent, though you can write them out with echo $variable and set them with variable=value (from bash). The search path is simply called PATH and you can get yours by typing echo $PATH.
I hope this was helpful.
If you want to find the location of a program you can just use whereis <program>.
In your case run:
whereis python2.7
whereis python3.2
For finding every file that apt-get has copied for installation use:
dpkg -S python2.7
dpkg -S python3.2
But maby it is recommend to save it in a textfile, because the output is to large.
dpkg -S python2.7 >log.txt
gedit log.txt
for running .py file with python 3.2
python3.2 <file.py>
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
execute the command:
echo $PATHroot1@master:/usr/lib/python2.7$ echo $PATH /home/root1/anaconda3/bin:/home/root1/NAI/Execution/HDE/x86_64.linux/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/home/root1/java/jdk1.8.0_74/bin:/usr/lib/jvm/java-8-oracle/bin:/usr/lib/jvm/java-8-oracle/db/bin:/usr/lib/jvm/java-8-oracle/jre/bin:/home/root1/NAI/hadoop-2.7.3/binRemove your anaconda3 from your path variable that is
/home/root1/anaconda3/bin:Again set PATH variable with remaining information like below
export PATH=/home/root1/NAI/Execution/HDE/x86_64.linux/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/home/root1/java/jdk1.8.0_74/bin:/usr/lib/jvm/java-8-oracle/bin:/usr/lib/jvm/java-8-oracle/db/bin:/usr/lib/jvm/java-8-oracle/jre/bin:/home/root1/NAI/hadoop-2.7.3/binExecute python command and should redirect to your python interpreter
root1@master:/usr/lib/python2.7$ 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. >>>
Hi, I have anaconda installed, so typing:
which python
just returns the anaconda path, however, I need to unearth the standard install location as a script is annoyingly asking for python2.7. Google unfortunately only tells you how to install it, and I know that, I've just forgotten where the binary is usually located on linux and google won't tell me that no matter what I type in.
UPDATE: Thanks guys, I found it looking in /usr/bin/ and /usr/local/bin/ and to my delight, it's not there, Just upgraded to Linux Mint 20 and there is python3.8. lovely.
You can type which python on the ubuntu terminal and it will give the Python installed location path.
First, I hope you don't really set PYTHONPATH=/etc, /etc is for configuration files, not python libraries.
You can see what an environment variable is set to by using echo, e.g.: echo $PYTHONPATH. If the variable has not been set it will be blank. You can also use env to get a list of all environment variables, and couple with grep to see if a particular one is set, e.g. env | grep PYTHONPATH.
You would probably also want this:
import sys
print(sys.path)
Or as a one liner from the terminal:
python -c "import sys; print('\n'.join(sys.path))"
Caveat: If you have multiple versions of Python installed you should use a corresponding command python2 or python3.
sys.path might include items that aren't specifically in your PYTHONPATH environment variable. To query the variable directly, use:
import os
try:
user_paths = os.environ['PYTHONPATH'].split(os.pathsep)
except KeyError:
user_paths = []
Try:
which python
in a terminal.
For this very reason it is recommend that you change your shebang line to be more path agnostic:
#!/usr/bin/env python
See this mailing list message for more information:
Consider the possiblities that in a different machine, python may be installed at
/usr/bin/pythonor/bin/pythonin those cases,#!/usr/local/bin/pythonwill fail. For those cases, we get to call theenvexecutable with argument which will determine the arguments path by searching in the$PATHand use it correctly.(
envis almost always located in/usr/bin/so one need not worry thatenvis not present at/usr/bin.)
I've installed python before on my main PC I installed it in /bin/sh.... that's something I didn't do on my laptop and now my program(geany) is looking for python in /bin/sh. How to fix this?