[Bug 797006] Re: software-center package update failure due to the use of update-alternatives
After using update-alternatives to switch between python versions recently, the update of software-center failed. /usr/bin/python is not managed by alternatives. This is a symlink which belongs to the python-minimal package. You have used alternatives and changed this file. It is *not* supported for a user to change any system-managed files (using alternatives or otherwise). What you have encountered is not a bug but a safety check against users which have modified system files. ** Changed in: python-central (Ubuntu) Status: New = Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/797006 Title: software-center package update failure due to the use of update- alternatives To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-central/+bug/797006/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 797006] Re: software-center package update failure due to the use of update-alternatives
** Package changed: software-center (Ubuntu) = python-central (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/797006 Title: software-center package update failure due to the use of update- alternatives To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-central/+bug/797006/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 797006] Re: software-center package update failure due to the use of update-alternatives
My suggestion is to change the check in /usr/share/pycentral-
data/pyversions.py to directly check the python version, instead of
joining /usr/bin/python and version number.
Sorry I got the detail wrong. After carefully examining /usr/share
/pycentral-data/pyversions.py, I think it's line 151 causing the
problem:
try:
_default_version = link = os.readlink('/usr/bin/python')
# line 151
except OSError:
_default_version = None
try:
cmd = ['/usr/bin/python', '-c', 'import sys; print
sys.version[:3]']
import subprocess
p = subprocess.Popen(cmd, bufsize=1,
shell=False, stdout=subprocess.PIPE)
fd = p.stdout
except ImportError:
fd = os.popen(/usr/bin/python -c 'import sys; print
sys.version[:3]')
line = fd.readline().strip()
fd.close()
if re.match(r'\d\.\d$', line):
_default_version = 'python' + line
Since the link exists, line 151 returns '/etc/alternatives/python',
which fails the consistency check. A quick fix is to remove line 150 to
153, as '/usr/bin/python', '-c', 'import sys; print sys.version[:3]'
returned the correct 2.7.
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https://bugs.launchpad.net/bugs/797006
Title:
software-center package update failure due to the use of update-
alternatives
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