co-install of python-shade and python3-shade results in a dpkg error

[John George]

Selecting previously unselected package python-shade.
Preparing to unpack .../python-shade_1.7.0-2~cloud0_all.deb ...
Unpacking python-shade (1.7.0-2~cloud0) ...
Preparing to unpack .../python3-shade_1.7.0-2~cloud0_all.deb ...
Unpacking python3-shade (1.7.0-2~cloud0) ...
dpkg: error processing archive /var/cache/apt/archives/python3-shade_1.7.0-2~cloud0_all.deb (--unpack):
 trying to overwrite '/usr/bin/shade-inventory', which is also in package python-shade 1.7.0-2~cloud0
 Errors were encountered while processing:
  /var/cache/apt/archives/python3-shade_1.7.0-2~cloud0_all.deb
  E: Sub-process /usr/bin/dpkg returned an error code (1)

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.4 LTS
Release: 16.04
Codename: xenial

[Launchpad Janitor (janitor)]

This bug was fixed in the package python-shade - 1.30.0-1

---------------
python-shade (1.30.0-1) unstable; urgency=medium

  [ Clint Byrum ]
  * New upstream release. (Closes: #882551)
  * add new build deps for upstream release

  [ Ondřej Nový ]
  * d/control: Set Vcs-* to salsa.debian.org
  * d/copyright: Use https protocol in Format field
  * d/control: Deprecating priority extra as per policy 4.0.1
  * d/watch: Use https protocol
  * d/control: Remove ancient X-Python-Version field
  * Convert git repository from git-dpm to gbp layout

  [ Clint Byrum ]
  * change from testrepository to stestr per upstream change
  * split shade-inventory into new package and add man page
    (LP: #1770300) (Closes: #843353)
  * Updating Build-Depends based on upstream changes.

 -- Clint Byrum <email address hidden> Mon, 07 Jan 2019 05:12:39 -0800