Changeing default Python versions

[Tuxgrrrl]

Greetings All,
We need to tell Kubuntu to make an earlier version of Python the default version dpkg sees.
Can someone please tel us how to change it temporarily?
We searched and read and searched but cant find it.

Thanks for your time.

[penguin.ch]

Re: Changeing default Python versions

You may redirect the "default pointer" (/usr/bin/python, linked to /usr/bin/python2.4)

ROOT@C3PO # ls -l /usr/bin/python*
lrwxrwxrwx 1 root root  9 2006-10-26 18:08 /usr/bin/python -> python2.4
-rwxr-xr-x 1 root root 996K 2006-10-11 23:52 /usr/bin/python2.4

To receive detailed advice, please post your machine's feedback to ls -l /usr/bin/python*

[Tuxgrrrl]

redirecting Pythons default pointer

thanks penguine ch!


$ ls -l /usr/bin/python*
lrwxrwxrwx 1 root root 9 2006-12-02 10:42 /usr/bin/python -> python2.4
-rwxr-xr-x 1 root root 1019680 2006-10-11 14:52 /usr/bin/python2.4
-rwxr-xr-x 1 root root 1145032 2006-10-06 08:23 /usr/bin/python2.5
-rwxr-xr-x 1 root root 1276 2006-10-06 08:23 /usr/bin/python2.5-config

going to read up redirecting pointers

[penguin.ch]

Re: Changeing default Python versions

Tuxgrrrl,

in the case specified, the following should do:

# backup
sudo cp /usr/bin/python /usr/bin/python.orig
# "redirect"
sudo ln -s /usr/bin/python2.5 /usr/bin/python
# check
ls -l /usr/bin/python*
# learn ;-)
man ln

[Tuxgrrrl]

Still no link for dpkg


Thanks again UnicornRider,


Python 2.3 is in /usr/local/bin

when given $ ls -l /usr/local/bin/python*
-rwxr-xr-x 2 root root 3002090 2007-02-04 09:56 /usr/local/bin/python
-rwxr-xr-x 2 root root 3002090 2007-02-04 09:56 /usr/local/bin/python2.3

but when given $ sudo ln -s /usr/local/bin/python2.3 /usr/bin/python
ln: creating symbolic link `/usr/bin/python' to `/usr/local/bin/python2.3': File exists

However

dpkg: dependency problems prevent configuration of cpia-control:
cpia-control depends on python (<< 2.4); however:
Version of python on system is 2.4.3-11ubuntu3

dpkg still only sees Python 2.4...

Do we have to reboot or is dpkg looking elsewhere?

[penguin.ch]

Re: Changeing default Python versions

[quote=Tuxgrrrl]
but when given $ sudo ln -s /usr/local/bin/python2.3 /usr/bin/python
ln: creating symbolic ]

Sorry ... please (re-)move the given link first (instead of merely copying it):

sudo mv /usr/bin/python /usr/bin/python.orig

dpkg still only sees Python 2.4

Please (re-)try the above, then check as mentioned ... if this fails, please post the system's feedback to which python ... however, there is no need for reboot (- no "Windozism" here, penguins are sensitive).

[Tuxgrrrl]

redirect still not seen

Thanks again for your time UnicornRider.
We got axed by the ISP...

# ls -l /usr/bin/python*
lrwxrwxrwx 1 root root 24 2007-02-04 13:35 /usr/bin/python -> /usr/local/bin/python2.3
-rwxr-xr-x 1 root root 1019680 2006-10-11 14:52 /usr/bin/python2.4
-rwxr-xr-x 1 root root 1145032 2006-10-06 08:23 /usr/bin/python2.5
-rwxr-xr-x 1 root root 1276 2006-10-06 08:23 /usr/bin/python2.5-config
lrwxrwxrwx 1 root root 9 2006-12-02 10:42 /usr/bin/python.orig -> python2.4

# dpkg -i cpia-control_0.5.1-2_i386.deb
...
dpkg: dependency problems prevent configuration of cpia-control:
cpia-control depends on python (<< 2.4); however:
Version of python on system is 2.4.3-11ubuntu3.