Executing python program
bash, executable, path, python
Solution
When invoking `python3` directly, python runs the script file you told it to, without using `$PATH` to find it. `PYTHONPATH` is irrelevant--that's used for searching for Python modules.
I'm guessing you're having issues with the wrong interpreter getting invoked when you run `script.py` by itself. I don't know what the first line of your script is, but it should be this:
#!/usr/bin/env python3
Or if you need even finer control:
#!/usr/bin/env python3.2
And for Python 2 scripts:
#!/usr/bin/env python2
Or:
#!/usr/bin/env python2.7
You should check that these executables exist on your system before trying to use them.
Problem
I have been searching the web for an answer now for quite a while, but this is giving me really headache: I am using Ubuntu 12.04 and I want to execute a Python script from the terminal without using the full path. So i added /home/kyril/python/scripts/ to the PATH variable through putting the following into ./bashrc: ``` kyrilpathvariable="/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/home/kyril/Python/scripts/:/home/kyril/Bash/scripts" if [ "$kyrilpathvariable" = "$PATH" ]; then echo PATH already exported else PATH=$PATH:/home/kyril/Python/scripts/ PATH=$PATH:/home/kyril/Bash/scripts/ export PATH fi ``` (I know the if clause is not necessary but I did not like to have everything two times in my PATH if I type exec bash.) Now the problem: this perfectly works for my Bash scripts, so after making them executable via chmod I can just type `$ script.sh` and it is executed. However if I type `$ python3 script.py` the following error is raised: `python3: can't open file 'script.py': [Errno 2] No such file or directory` if I type in the full path to the script it works. Anybody has an idea what I am doing wrong? Do I have to add the directory to the PYTHONPATH? (As I understood this only helps for importing modules). Thanks guys!