[Bug 1512326] Re: Running apt-check --package-names returns an unknown error

[Brian Murray]

Hello Woody, or anyone else affected,

Accepted update-notifier into wily-proposed. The package will build now
and be available at https://launchpad.net/ubuntu/+source/update-
notifier/3.163.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: update-notifier (Ubuntu Wily)
       Status: In Progress => Fix Committed

** Tags added: verification-needed

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https://bugs.launchpad.net/bugs/1512326

Title:
  Running apt-check --package-names returns an unknown error

Status in update-notifier package in Ubuntu:
  Fix Released
Status in update-notifier source package in Wily:
  Fix Committed
Status in update-notifier source package in Xenial:
  Fix Released

Bug description:
  When running /usr/lib/update-notifier/apt-check --package-names the
  following error is returned:

  $ /usr/lib/update-notifier/apt-check --package-names
  E: Unknown Error: '<class 'TypeError'>' (map() must have at least two arguments.)

  What I expected was a list of packages which can be upgraded.

  From what I understand, the map function requires 2 arguments, but the
  list comprehension used is only creating a single argument, which is
  the package name.

  I found if  I changed the function

  def write_package_names(outstream, cache, depcache):
      " write out package names that change to outstream "
      pkgs = [pkg for pkg in cache.packages if depcache.marked_install(pkg) or
          depcache.marked_upgrade(pkg)]
      outstream.write("\n".join(map([p.name for p in pkgs])))


  def write_package_names(outstream, cache, depcache):
      " write out package names that change to outstream "
      pkgs = [pkg for pkg in cache.packages if depcache.marked_install(pkg) or
          depcache.marked_upgrade(pkg)]
      outstream.write("\n".join([p.name for p in pkgs]))        #Removed the map() function

  
  Additional info:
  $ lsb_release -rd
  Description:    Ubuntu 15.10
  Release:        15.10

  $ apt-cache policy update-notifier-common
  update-notifier-common:
    Installed: 3.163
    Candidate: 3.163
    Version table:
   *** 3.163 0
          500 http://gb.archive.ubuntu.com/ubuntu/ wily/main amd64 Packages
          100 /var/lib/dpkg/status

  Thanks

  Dave

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