installation error Ignoring dnspython3: markers u"python_version=='3.4'" don't match your environment

[sajuptpm]

Requirement already satisfied (use --upgrade to upgrade): functools32===3.2.3.post2 in /usr/local/lib/python2.7/dist-packages (from -c /opt/stack/requirements/upper-constraints.txt (line 123))
Requirement already satisfied (use --upgrade to upgrade): jsonpointer===1.10 in /usr/local/lib/python2.7/dist-packages (from -c /opt/stack/requirements/upper-constraints.txt (line 145))
Installing collected packages: tacker
  Running setup.py develop for tacker
Successfully installed tacker-0.3.1.dev157
Installing test-requirements for /opt/stack/tacker/test-requirements.txt
Ignoring dnspython3: markers u"python_version=='3.4'" don't match your environment
Ignoring ovs: markers u"python_version=='3.4'" don't match your environment
Could not satisfy constraints for 'python-tackerclient': installation from path or url cannot be constrained to a version
Error on exit
World dumping... see /opt/stack/logs/worlddump-2016-06-24-194155.txt for details

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/334085

[OpenStack Infra (hudson-openstack)]

Change abandoned by sajuptpm (<email address hidden>) on branch: master
Review: https://review.openstack.org/334085
Reason: already fixed it
https://review.openstack.org/#/c/336305/

[Ashish (ashish235)]

I 'm still getting this error while trying to install stable/mitaka version using devstack.

2017-01-16 10:59:42.715 | Ignoring dnspython3: markers 'python_version == "3.4"' don't match your environment
2017-01-16 10:59:43.003 | Obtaining file:///opt/stack/tacker
2017-01-16 10:59:44.583 | Exception:
2017-01-16 10:59:44.583 | Traceback (most recent call last):
2017-01-16 10:59:44.583 | File "/usr/local/lib/python2.7/dist-packages/pip/basecommand.py", line 215, in main
2017-01-16 10:59:44.583 | status = self.run(options, args)
2017-01-16 10:59:44.583 | File "/usr/local/lib/python2.7/dist-packages/pip/commands/install.py", line 335, in run
2017-01-16 10:59:44.583 | wb.build(autobuilding=True)
2017-01-16 10:59:44.583 | File "/usr/local/lib/python2.7/dist-packages/pip/wheel.py", line 749, in build
2017-01-16 10:59:44.583 | self.requirement_set.prepare_files(self.finder)
2017-01-16 10:59:44.583 | File "/usr/local/lib/python2.7/dist-packages/pip/req/req_set.py", line 380, in prepare_files
2017-01-16 10:59:44.583 | ignore_dependencies=self.ignore_dependencies))
2017-01-16 10:59:44.583 | File "/usr/local/lib/python2.7/dist-packages/pip/req/req_set.py", line 521, in _prepare_file
2017-01-16 10:59:44.583 | req_to_install.check_if_exists()
2017-01-16 10:59:44.583 | File "/usr/local/lib/python2.7/dist-packages/pip/req/req_install.py", line 1036, in check_if_exists
2017-01-16 10:59:44.583 | self.req.name
2017-01-16 10:59:44.583 | File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/pkg_resources/__init__.py", line 558, in get_distribution
2017-01-16 10:59:44.583 | dist = get_provider(dist)
2017-01-16 10:59:44.583 | File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/pkg_resources/__init__.py", line 432, in get_provider
2017-01-16 10:59:44.583 | return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
2017-01-16 10:59:44.583 | File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/pkg_resources/__init__.py", line 968, in require
2017-01-16 10:59:44.583 | needed = self.resolve(parse_requirements(requirements))
2017-01-16 10:59:44.583 | File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/pkg_resources/__init__.py", line 859, in resolve
2017-01-16 10:59:44.583 | raise VersionConflict(dist, req).with_context(dependent_req)
2017-01-16 10:59:44.583 | ContextualVersionConflict: (paramiko 1.16.0 (/usr/local/lib/python2.7/dist-packages), Requirement.parse('paramiko>=2.0'), set(['tacker']))
2017-01-16 10:59:44.678 | Error on exit