[Bug 1764164] Re: update-manager crashed with Depends in _show_transaction(): python3 (< 3.7) but 3.6.5-2 is installed

[Balint Reczey]

*** This bug is a duplicate of bug 1317164 ***
    https://bugs.launchpad.net/bugs/1317164

** This bug is no longer a duplicate of bug 1203597
   update-manager crashed with              Depends in _show_transaction(): php5-common (= 5.5.0+dfsg-15ubuntu1) but 5.4.15-1ubuntu3 is installed
** This bug has been marked a duplicate of bug 1317164
   Show reason of TransactionFailed and let the user try again instead of crashing

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https://bugs.launchpad.net/bugs/1764164

Title:
  update-manager crashed with              Depends in
  _show_transaction(): python3 (< 3.7) but 3.6.5-2 is installed

Status in update-manager package in Ubuntu:
  New

Bug description:
  lenovo t61p

  ProblemType: Crash
  DistroRelease: Ubuntu 18.04
  Package: update-manager 1:18.04.11
  ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
  Uname: Linux 4.15.0-13-generic x86_64
  ApportVersion: 2.20.9-0ubuntu4
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Apr 15 19:29:25 2018
  ExecutablePath: /usr/bin/update-manager
  GsettingsChanges:
   b'com.ubuntu.update-manager' b'first-run' b'false'
   b'com.ubuntu.update-manager' b'launch-time' b'int64 1523816509'
  InstallationDate: Installed on 2018-04-01 (14 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180327)
  InterpreterPath: /usr/bin/python3.6
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python3 /usr/bin/update-manager
  ProcEnviron:
   LANGUAGE=en_GB:en
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-2
  PythonArgs: ['/usr/bin/update-manager']
  PythonDetails: /home/chris/Error: command ['which', 'python'] failed with exit code 1:, Error: [Errno 2] No such file or directory: "/home/chris/Error: command ['which', 'python'] failed with exit code 1:": "/home/chris/Error: command ['which', 'python'] failed with exit code 1:", unpackaged
  SourcePackage: update-manager
  Title: update-manager crashed with              Depends in _show_transaction(): python3 (< 3.7) but 3.6.5-2 is installed
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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