Thanks everyone for help. Finally I figured out that problem was in AptDaemon. Executing sudo aptd gave me this error:
Code:
Traceback (most recent call last):
File "/usr/sbin/aptd", line 28, in <module>
import aptdaemon.core
File "/usr/lib/python3/dist-packages/aptdaemon/core.py", line 66, in <module>
from .worker import (
File "/usr/lib/python3/dist-packages/aptdaemon/worker.py", line 56, in <module>
import pkg_resources
File "/usr/local/lib/python3.3/dist-packages/pkg_resources.py", line 621
except ResolutionError,v:
^
SyntaxError: invalid syntax
Then I manually applied some changes to pkg_resources.py file from this patch. Now I'm able to use Software Center and install updates but I'm afraid that it will break again after any update affecting this file... I don't understand why it stopped working and what changes I made trying to install these apps.
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