Ubuntu 10.10 ‘Command not found’ for python script

pythonshellUbuntu

I have a python script 'monty.py' with

#!/usr/bin/env python

in the first line. When I run monty.py in the terminal, I get

monty.py: command not found

I am in the correct directory, and I also have chmod'ed it to be executable. Why won't this run? I am running Ubuntu 10.10 in vmware player.

Edit: Also, when I run /usr/bin/env python from the command line, the python interpreter starts up. So it is in the right place.

Edit edit: I figured it out. Apparently I don't know how to use chmod.

python /path/to/monty/monty.py

cd /path/to/monty
./monty.py

To execute it the second way (./) the monty.py file must be marked as executable:

chmod +x /path/to/monty/monty.py

I think you need to set PYTHONPATH after changing the links. On a fresh install of Ubuntu 10.10 I just did, I have:

evadeflow(57)% echo $PYTHONPATH 
/home/evadeflow/lib/python2.6/site-packages:/usr/lib/python2.6/site-packages

You should set this in your environment so it points to the version you want to use (i.e., change the 2.6 to 2.7...)

Generally, homebrew will install a formula into /usr/local/Cellar/formula and then place a link at /usr/local/bin/formula.

To make use of your installed formulae, make sure /usr/local/bin is in your $PATH. Show your $PATH by typing

echo $PATH

If /usr/local/bin is not in your $PATH, put this line at the end of your ~/.profile file.

export PATH="/usr/local/bin:$PATH"

Now, check what pythons are found on your OSX by typing:

which -a python

There should be one python found at /usr/bin/ (the Apple python) and one at /usr/local/bin/ which is the Homebrew python.

which python

will show you, which python is found first in your $PATH and will be executed when you invoke python.

If you want to know, where the executable is, show it by typing

ls -l $(which python)

This could look like this: lrwxr-xr-x 1 root wheel 68 7 Mai 13:22 python -> /usr/local/bin/python

This will work for pip as well.

If you show the results of this steps, we can probably help you much easier.

-- UPDATE --

You have /usr/local/bin/python linked to /usr/local/Cellar/python/2.7.9/bin/python. -> brew install python worked.

show, if pip is installed by typing

brew list python | grep pip

You should see

/usr/local/Cellar/python/2.7.9/bin/pip

If not, check, if there are links, which are not done with brew install. Told you something like this:

"Error: The `brew link` step did not complete successfully
The formula built, but is not symlinked into /usr/local"

To force the link and overwrite all conflicting files:

brew link --overwrite python

To list all files that would be deleted:

brew link --overwrite --dry-run python

** NO standard Apple /usr/bin/python **

link from /usr/local/Cellar/python/2.7.9/bin/python to /usr/bin/python

ln -s /usr/local/Cellar/python/2.7.9/bin/python /usr/bin/python

This is necessary for all python scripts beginning with #!/usr/bin/python. Especialy easy_install will fail, if link is not there.

Now, you are able to run

easy_install pip

Hope, you're making progress