package python3-libcloud 2.3.0-1 failed to install/upgrade: installed python3-libcloud package post-installation script subprocess returned error exit status 1

[The Altruist]

While upgrading from Bionic to Cosmic:

Setting up python3-libcloud (2.3.0-1) ...
  File "/usr/lib/python3/dist-packages/libcloud/compute/drivers/azure.py", line 1438
    def _perform_post(self, path, body, response_type=None, async=False):
                                                                ^
SyntaxError: invalid syntax

dpkg: error processing package python3-libcloud (--configure):
 installed python3-libcloud package post-installation script subprocess returned error exit status 1

ProblemType: Package
DistroRelease: Ubuntu 18.10
Package: python3-libcloud 2.3.0-1
ProcVersionSignature: Ubuntu 4.17.0-7.8-generic 4.17.12
Uname: Linux 4.17.0-7-generic x86_64
ApportVersion: 2.20.10-0ubuntu9
Architecture: amd64
Date: Mon Aug 27 03:46:13 2018
ErrorMessage: installed python3-libcloud package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2018-03-30 (150 days ago)
InstallationMedia: Xubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105)
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.6+, python3-minimal, 3.6.6-1
PythonDetails: /usr/bin/python2.7, Python 2.7.15, python-minimal, 2.7.15-3
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu3
 apt 1.7.0~alpha3
SourcePackage: libcloud
Title: package python3-libcloud 2.3.0-1 failed to install/upgrade: installed python3-libcloud package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to cosmic on 2018-08-27 (0 days ago)

[Andreas Hasenack (ahasenack)]

Thanks for the report. I'm working on a fix over at bug #1788931