cinnamon-desktop-environment: installation from apt fails due to python issues

luca@luca-mipro:~/Downloads$ sudo apt-get install cinnamon-desktop-environment
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  cinnamon cinnamon-common cinnamon-core cjs gconf2 gir1.2-cmenu-3.0 gir1.2-keybinder-3.0 gir1.2-meta-muffin-0.0 gksu libcjs0 libgksu2-0 libgnome-keyring-common
  libgnome-keyring0 libkeybinder-3.0-0 libmozjs-38-0 python-pam python-pexpect python-pil python-ptyprocess python-pyinotify
Suggested packages:
  cinnamon-doc python-opencv gconf-defaults-service python-pam-dbg python-pexpect-doc python-pil-doc python-pil-dbg python-pyinotify-doc
The following NEW packages will be installed:
  cinnamon cinnamon-common cinnamon-core cinnamon-desktop-environment cjs gconf2 gir1.2-cmenu-3.0 gir1.2-keybinder-3.0 gir1.2-meta-muffin-0.0 gksu libcjs0
  libgksu2-0 libgnome-keyring-common libgnome-keyring0 libkeybinder-3.0-0 libmozjs-38-0 python-pam python-pexpect python-pil python-ptyprocess python-pyinotify
0 upgraded, 21 newly installed, 0 to remove and 0 not upgraded.
Need to get 3.042 kB/4.643 kB of archives.
After this operation, 20,0 MB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 http://it.archive.ubuntu.com/ubuntu bionic/universe amd64 libgnome-keyring-common all 3.12.0-1build1 [5.792 B]
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Get:3 http://it.archive.ubuntu.com/ubuntu bionic/main amd64 python-pil amd64 5.0.0-1 [321 kB]
Get:4 http://it.archive.ubuntu.com/ubuntu bionic/universe amd64 libmozjs-38-0 amd64 38.8.0~repack1-0ubuntu4 [2.122 kB]
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Get:8 http://it.archive.ubuntu.com/ubuntu bionic/universe amd64 gir1.2-keybinder-3.0 amd64 0.3.2-1 [3.164 B]
Get:9 http://it.archive.ubuntu.com/ubuntu bionic/main amd64 python-pam amd64 0.4.2-13.2ubuntu4 [9.856 B]
Get:10 http://it.archive.ubuntu.com/ubuntu bionic/universe amd64 python-ptyprocess all 0.5.2-1 [12,6 kB]
Get:11 http://it.archive.ubuntu.com/ubuntu bionic/universe amd64 python-pexpect all 4.2.1-1 [41,7 kB]
Get:12 http://it.archive.ubuntu.com/ubuntu bionic/main amd64 python-pyinotify all 0.9.6-1 [24,6 kB]
Get:13 http://it.archive.ubuntu.com/ubuntu bionic/universe amd64 gconf2 amd64 3.2.6-4ubuntu1 [66,9 kB]
Get:14 http://it.archive.ubuntu.com/ubuntu bionic/universe amd64 libgksu2-0 amd64 2.0.13~pre1-9ubuntu2 [76,8 kB]
Get:15 http://it.archive.ubuntu.com/ubuntu bionic/universe amd64 gksu amd64 2.0.2-9ubuntu1 [51,5 kB]
Fetched 3.042 kB in 1s (5.819 kB/s)
Selecting previously unselected package libgnome-keyring-common.
(Reading database ... 263008 files and directories currently installed.)
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Unpacking libgnome-keyring-common (3.12.0-1build1) ...
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Unpacking libgnome-keyring0:amd64 (3.12.0-1build1) ...
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Setting up libgnome-keyring-common (3.12.0-1build1) ...
Setting up gconf2 (3.2.6-4ubuntu1) ...
Processing triggers for mime-support (3.60ubuntu1) ...
Processing triggers for desktop-file-utils (0.23-1ubuntu3) ...
Processing triggers for libglib2.0-0:amd64 (2.56.0-2ubuntu1) ...
Setting up libgnome-keyring0:amd64 (3.12.0-1build1) ...
Setting up python-pyinotify (0.9.6-1) ...
Setting up gir1.2-meta-muffin-0.0 (3.6.0-1) ...
Setting up gir1.2-cmenu-3.0 (3.6.0-1) ...
Setting up python-ptyprocess (0.5.2-1) ...
Processing triggers for libc-bin (2.27-0ubuntu2) ...
Processing triggers for man-db (2.8.2-1) ...
Processing triggers for gnome-menus (3.13.3-11ubuntu1) ...
Setting up python-pam (0.4.2-13.2ubuntu4) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Setting up libmozjs-38-0:amd64 (38.8.0~repack1-0ubuntu4) ...
Setting up python-pil:amd64 (5.0.0-1) ...
Setting up libgksu2-0 (2.0.13~pre1-9ubuntu2) ...
update-alternatives: using /usr/share/libgksu/debian/gconf-defaults.libgksu-sudo to provide /usr/share/gconf/defaults/10_libgksu (libgksu-gconf-defaults) in auto mode
Setting up libkeybinder-3.0-0:amd64 (0.3.2-1) ...
Setting up cinnamon-common (3.6.7-3) ...
  File "/usr/share/cinnamon/cinnamon-desktop-editor/cinnamon-desktop-editor.py", line 473
    print "Invalid args"
                       ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Invalid args")?

  File "/usr/share/cinnamon/cinnamon-json-makepot/cinnamon-json-makepot.py", line 21
    print """

    Module "polib" not available.

    Please install the package "python-polib" and try again

    """

      ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("""

    Module "polib" not available.

    Please install the package "python-polib" and try again

    """)?

  File "/usr/share/cinnamon/cinnamon-looking-glass/page_inspect.py", line 140
    print e
          ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print(e)?

  File "/usr/share/cinnamon/cinnamon-looking-glass/page_log.py", line 91
    print e
          ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print(e)?

  File "/usr/share/cinnamon/cinnamon-looking-glass/page_results.py", line 60
    print e
          ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print(e)?

  File "/usr/share/cinnamon/cinnamon-looking-glass/page_windows.py", line 92
    print e
          ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print(e)?

  File "/usr/share/cinnamon/cinnamon-menu-editor/cme/MenuEditor.py", line 39
    except (IOError, xml.parsers.expat.ExpatError), e:
                                                  ^
SyntaxError: invalid syntax

  File "/usr/share/cinnamon/cinnamon-settings/bin/CinnamonGtkSettings.py", line 48
    print "set", value
              ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("set", value)?

  File "/usr/share/cinnamon/cinnamon-settings/bin/ExtensionCore.py", line 596
    except Exception, msg:
                    ^
SyntaxError: invalid syntax

  File "/usr/share/cinnamon/cinnamon-settings/bin/Spices.py", line 17
    except Exception, detail:
                    ^
SyntaxError: invalid syntax

  File "/usr/share/cinnamon/cinnamon-settings/bin/capi.py", line 47
    except Exception, e:
                    ^
SyntaxError: invalid syntax

  File "/usr/share/cinnamon/cinnamon-settings/bin/proxygsettings.py", line 104
    print CANNOT_PARSE_WARNING % value
                             ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print(CANNOT_PARSE_WARNING % value)?

  File "/usr/share/cinnamon/cinnamon-settings/cinnamon-settings.py", line 36
    print "No settings modules found!!"
                                      ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("No settings modules found!!")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_accessibility.py", line 35
    print "Loading Accessibility module"
                                       ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Accessibility module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_applets.py", line 20
    print "Loading Applets module"
                                 ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Applets module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_backgrounds.py", line 107
    print "Loading Backgrounds module"
                                     ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Backgrounds module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_calendar.py", line 16
    print "Loading Calendar module"
                                  ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Calendar module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_default.py", line 210
    print "%s: " % info.get_name()
               ^
SyntaxError: invalid syntax

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_desklets.py", line 19
    print "Loading Desklets module"
                                  ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Desklets module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_desktop.py", line 37
    print "Loading Desktop module"
                                 ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Desktop module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_effects.py", line 103
    print "Loading Effects module"
                                 ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Effects module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_extensions.py", line 19
    print "Loading Extensions module"
                                    ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Extensions module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_fonts.py", line 22
    print "Loading Fonts module"
                               ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Fonts module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_general.py", line 18
    print "Loading General module"
                                 ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading General module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_hotcorner.py", line 27
    print "Loading HotCorner module"
                                   ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading HotCorner module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_info.py", line 146
    print "Loading Info module"
                              ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Info module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_keyboard.py", line 215
    print "Loading Keyboard module"
                                  ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Keyboard module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_mouse.py", line 22
    print "Loading Mouse module"
                               ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Mouse module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_notifications.py", line 46
    print "Loading Notifications module"
                                       ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Notifications module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_online_accounts.py", line 16
    print "Loading Online Account module"
                                        ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Online Account module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_panel.py", line 78
    print "Loading Panel module"
                               ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Panel module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_power.py", line 103
    print "Loading Power module"
                               ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Power module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_privacy.py", line 23
    print "Loading Privacy module"
                                 ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Privacy module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_screensaver.py", line 62
    print "Loading Screensaver module"
                                     ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Screensaver module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_sound.py", line 508
    print "Loading Sound module"
                               ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Sound module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_startup.py", line 37
    print "Loading Startup Applications module"
                                              ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Startup Applications module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_themes.py", line 29
    print "Loading Themes module"
                                ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Themes module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_tiling.py", line 18
    print "Loading Tiling module"
                                ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Tiling module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_user.py", line 34
    print "Loading User module"
                              ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading User module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_windows.py", line 22
    print "Loading Windows module"
                                 ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Windows module")?

  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_workspaces.py", line 21
    print "Loading Workspaces module"
                                    ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Loading Workspaces module")?

  File "/usr/share/cinnamon/cinnamon-settings-users/cinnamon-settings-users.py", line 52
    except Exception, detail:
                    ^
SyntaxError: invalid syntax

  File "/usr/share/cinnamon/cinnamon-slideshow/cinnamon-slideshow.py", line 305
    except Exception, detail:
                    ^
SyntaxError: invalid syntax

dpkg: error processing package cinnamon-common (--configure):
 installed cinnamon-common package post-installation script subprocess returned error exit status 1
dpkg: dependency problems prevent configuration of cinnamon:
 cinnamon depends on cinnamon-common (= 3.6.7-3); however:
  Package cinnamon-common is not configured yet.

dpkg: error processing package cinnamon (--configure):
 dependency problems - leaving unconfigured
Setting up python-pexpect (4.2.1-1) ...
No apport report written because the error message indicates its a followup error from a previous failure.
                                                                                                          Setting up gir1.2-keybinder-3.0 (0.3.2-1) ...
Setting up libcjs0:amd64 (3.6.1-0ubuntu1) ...
Setting up cjs (3.6.1-0ubuntu1) ...
dpkg: dependency problems prevent configuration of cinnamon-core:
 cinnamon-core depends on cinnamon (>= 3.6); however:
  Package cinnamon is not configured yet.

dpkg: error processing package cinnamon-core (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of cinnamon-desktop-environment:
 cinnamon-desktop-environment depends on cinnamon-core (>= 3.6); however:
  Package cinnamon-core is not configured yet.

dpkg: error processing package cinnamon-desktop-environment (--configure):
 dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
                                                                                                          No apport report written because MaxReports is reached already
  Processing triggers for gconf2 (3.2.6-4ubuntu1) ...
Setting up gksu (2.0.2-9ubuntu1) ...
Processing triggers for libc-bin (2.27-0ubuntu2) ...
Errors were encountered while processing:
 cinnamon-common
 cinnamon
 cinnamon-core
 cinnamon-desktop-environment
E: Sub-process /usr/bin/dpkg returned an error code (1)

There is no limit to text here so pastebin isn't required. I've pasted the text in case the pastebin gets removed

What is the output of:

apt-cache policy cinnamon-common cinnamon cinnamon-core cinnamon-desktop-environment

Thanks

Thanks for pasting the pastebin.

Here´s the output:

luca@luca-mipro:~$ apt-cache policy cinnamon-common cinnamon cinnamon-core cinnamon-desktop-environment
cinnamon-common:
  Installed: 3.6.7-3
  Candidate: 3.6.7-3
  Version table:
 *** 3.6.7-3 500
        500 http://it.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        500 http://it.archive.ubuntu.com/ubuntu bionic/universe i386 Packages
        100 /var/lib/dpkg/status
cinnamon:
  Installed: 3.6.7-3
  Candidate: 3.6.7-3
  Version table:
 *** 3.6.7-3 500
        500 http://it.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        100 /var/lib/dpkg/status
cinnamon-core:
  Installed: 3.6
  Candidate: 3.6
  Version table:
 *** 3.6 500
        500 http://it.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        500 http://it.archive.ubuntu.com/ubuntu bionic/universe i386 Packages
        100 /var/lib/dpkg/status
cinnamon-desktop-environment:
  Installed: 3.6
  Candidate: 3.6
  Version table:
 *** 3.6 500
        500 http://it.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        500 http://it.archive.ubuntu.com/ubuntu bionic/universe i386 Packages
        100 /var/lib/dpkg/status

Yeah I know it's not stable, I'm trying it out and I thought I could help by submitting this issue I've faced today.

Here's the bug url, for reference: https://bugs.launchpad.net/ubuntu/+source/cinnamon/+bug/1759551

Thanks for answering!

Thanks actionparsnip, that solved my question.

A new version has been prepared (3.6.7-4), which is supposed to solve this problem.
This new release should be available on all mirror servers in a few hours.