Re: [Tutor] specifying my default python installation
I am new to both freebsd and python. I have python 2.6 and 3.2 both installed on freebsd. python runs python 2.6 and I need to use python3.2 to run python 3.2 Do I need to do something to make python 3.2 the default? I am not really familiar with BSD but *nix has the application update-alternatives. That will do what you want. Otherwise, you could change the name/location in the bin directory. It is likely that python is a symlink to python2.6 and all you need to do is change the symlink to point to python3.2. If no symlink is used you can rename the binaries instead. Apologies in advanced if this is way off base. Ramit This email is confidential and subject to important disclaimers and conditions including on offers for the purchase or sale of securities, accuracy and completeness of information, viruses, confidentiality, legal privilege, and legal entity disclaimers, available at http://www.jpmorgan.com/pages/disclosures/email. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] specifying my default python installation
OK thanks. It sounds like maybe this is all normal then, not an indication that something went wrong with my 3.2 install. -Original Message- From: tutor-bounces+debby=glance@python.org [mailto:tutor-bounces+debby=glance@python.org] On Behalf Of Prasad, Ramit Sent: Friday, August 17, 2012 11:06 AM To: tutor@python.org Subject: Re: [Tutor] specifying my default python installation I am new to both freebsd and python. I have python 2.6 and 3.2 both installed on freebsd. python runs python 2.6 and I need to use python3.2 to run python 3.2 Do I need to do something to make python 3.2 the default? I am not really familiar with BSD but *nix has the application update-alternatives. That will do what you want. Otherwise, you could change the name/location in the bin directory. It is likely that python is a symlink to python2.6 and all you need to do is change the symlink to point to python3.2. If no symlink is used you can rename the binaries instead. Apologies in advanced if this is way off base. Ramit This email is confidential and subject to important disclaimers and conditions including on offers for the purchase or sale of securities, accuracy and completeness of information, viruses, confidentiality, legal privilege, and legal entity disclaimers, available at http://www.jpmorgan.com/pages/disclosures/email. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] specifying my default python installation
On Fri, Aug 17, 2012 at 11:05 AM, Prasad, Ramit ramit.pra...@jpmorgan.com wrote: I am not really familiar with BSD but *nix has the application update-alternatives. That will do what you want. Otherwise, you could change the name/location in the bin directory. It is likely that python is a symlink to python2.6 and all you need to do is change the symlink to point to python3.2. If no symlink is used you can rename the binaries instead. Modifying the default to Python 3 sounds like a bad idea. Platforms are still in transition to 3.x. Some scripts might assume /usr/bin/python links to python2.x. On Debian there's a python3 symlink. You can add your own if FreeBSD doesn't have it. First, if ~/bin doesn't exist, run mkdir ~/bin; restart your session, and run echo $PATH to verify it's on the search path. Then make the link with ln -s /usr/bin/python3.2 ~/bin/python3. You'll have to update this when 3.3 is released. If ~/bin isn't on the PATH, edit ~/.profile and add the following: if [ -d $HOME/bin ] ; then PATH=$HOME/bin:$PATH fi Also, while it's probably a bit much at first, I recommend using virtualenv to configure environments with different versions of Python/packages: http://www.virtualenv.org ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] specifying my default python installation
On 17/08/12 15:27, debbym wrote: I am new to both freebsd and python. I have python 2.6 and 3.2 both installed on freebsd. python runs python 2.6 and I need to use python3.2 to run python 3.2 Do I need to do something to make python 3.2 the default? The generic way to do that on *nix is to create/modify the symbolic links in the directory holding the binaries. You should be able to get that with the which command: which python which python2 which python3 On my system the latest install package seems to create the python2/python3 links itself. I'm not sure what sets up the python link - the mysteries of Synaptic package management. Once you have the directory you can view the links with ls -l In my case its in /usr/bin so: $ ls -l /usr/bin/pyth* lrwxrwxrwx 1 root root 9 2011-08-13 16:04 /usr/bin/python - python2.6 lrwxrwxrwx 1 root root 9 2011-08-13 16:04 /usr/bin/python2 - python2.6 -rwxr-xr-x 1 root root 2613296 2010-04-16 15:42 /usr/bin/python2.6 lrwxrwxrwx 1 root root 9 2011-08-13 20:47 /usr/bin/python3 - python3.1 -rwxr-xr-x 1 root root 2849576 2011-12-09 21:26 /usr/bin/python3.1 You can then create/modify the links as required using the ln -s command. HTH -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] specifying my default python installation
On 8/17/12, debbym de...@glance.net wrote: I am new to both freebsd and python. I have python 2.6 and 3.2 both installed on freebsd. python runs python 2.6 and I need to use python3.2 to run python 3.2 Do I need to do something to make python 3.2 the default? FreeBSD doesn't have an 'alternatives' system like debian flavors. However, there's nothing wrong with your install. I run FreeBSD on several boxes. On this box I have python 2.6, 2.7, and 3.2 installed. My default 'python' executable is a symlink that points to /usr/local/bin/python, which itself is version 2.6. (The box I'm on is FreeBSD 8.1) If I want a program to run in python3.2, I put something like this (or similar) as the shebang line at the top of the file: #!/usr/bin/evn python3.2 Or to get the interpretter just type 'python3.2'. Don't worry about the shebang lines being cross platform either; Once you package up your scripts into python packages, using distutils or similar, all shebang lines will be stripped. Upon re-installation on the target platform they'll be replaced appropriately. (In fact, some platforms even put 'env' in /bin instead of FreeBSD's /usr/bin.) I would also recommend against changing the default 'python' symlink, as some tools may depend on it being at a specific version. One I can think of off the top of my head is the third party `xps` tool for searching ports. This is most notable when talking about python2.x vs. the 3.x branch, as python 3 broke backward compatibility with things like print statements becoming print functions. If you find it irritating to have to type 'python3.2' instead of just 'python', you could create an alias for your shell, so that 'python' is aliased to 'python3.2'. I use tcsh, so I in my case my $HOME/.cshrc file might look something like this: alias python /usr/local/bin/python3.2 Then I would type 'source .cshrc' or logout and back in for changes to take affect. As an alternative, you could create a symlink from your own bin directory instead. For example: cd mkdir bin ln -s /usr/local/bin/python3.2 ./bin/python This should work once you type 'rehash' (in tcsh) or logout and log back in. Most default installs will list the 'bin' directory, found in a given user's home directory, on the default $PATH. You can verify this by typing 'echo $PATH' and making sure '/home/you/bin' is listed. This isn't as good of an option as simply using the alternate shebangs, as it affectively replaces your version of python with the version you choose, but it will work. Finally, if you want to get carried away, you can install a virtual python as mentioned. For even more options, you might subscribe to questi...@freebsd.org ;) -Modulok- ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
