Comment 0 for bug 1743133

eps to reproduce:
1. Install Ubuntu 17.10 MATE
2. Install Pluma dependencies to fix neighbor bug 1743132 - `sudo apt-get install libpeas-1.0-python2loader gir1.2-pluma-1.0`
3. Launch Pluma text editor from terminal
4. Go to Edit->Preferences, Plugins tab, check "External Tools" plugin

Expected results:
"External Tools" plugin enabled successfully and shows no warnings

Actual results:
"External Tools" plugin enabled but, shows warning:

(pluma:3817): libpeas-WARNING **: Failed to run internal Python hook 'find_extension_type':
Traceback (most recent call last):
  File "peas-python-internal.py", line 71, in call
  File "peas-python-internal.py", line 130, in find_extension_type
AttributeError: 'module' object has no attribute 'UniqueById'

Notes:
1. `sudo apt-file search peas-python-internal.py` returns nothing.
2. unable to find peas-python-internal.py from Midnight Commander, so it seems to be packaging issue.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: pluma 1.18.2-1
ProcVersionSignature: Ubuntu 4.13.0-25.29-generic 4.13.13
Uname: Linux 4.13.0-25-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
CurrentDesktop: MATE
Date: Sat Jan 13 20:02:11 2018
InstallationDate: Installed on 2017-12-23 (21 days ago)
InstallationMedia: Ubuntu-MATE 17.10 "Artful Aardvark" - Release amd64 (20171018)
SourcePackage: pluma
UpgradeStatus: No upgrade log present (probably fresh install)