If I install python3-httpie from the leap 15.1 repo, the main script in the
package does not work:

Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 578,
in _build_master
    ws.require(__requires__)
  File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 895,
in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 786,
in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (Pygments 2.2.0
(/usr/lib/python3.6/site-packages), Requirement.parse('Pygments>=2.3.1'),
{'httpie'})

The Pygments version in the main repo is 2.2.0. It can be worked around by
installing Pygments from devel:languages:python, but that's obviously not a
good solution.