As stated in [1]. Otherwise failures occur. I discovered this when trying to run the python-language-server (which did not run). Note that this dependency has changed in the current HEAD revision. [1] https://github.com/davidhalter/jedi/blob/c09e21ae4bf63baa5723f73260581a50f317cb46/requirements.txt
Here is the error that pops up during the attempt: <pre> Traceback (most recent call last): File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 583, in _build_master ws.require(__requires__) File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 900, in require needed = self.resolve(parse_requirements(requirements)) File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 791, in resolve raise VersionConflict(dist, req).with_context(dependent_req) pkg_resources.ContextualVersionConflict: (parso 0.8.0 (/usr/lib/python3.7/site-packages), Requirement.parse('parso<0.8.0,>=0.7.0'), {'jedi'}) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/lib/python-exec/python3.7/pyls", line 6, in <module> from pkg_resources import load_entry_point File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 3251, in <module> @_call_aside File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 3235, in _call_aside f(*args, **kwargs) File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 3264, in _initialize_master_working_set working_set = WorkingSet._build_master() File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 585, in _build_master return cls._build_from_requirements(__requires__) File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 598, in _build_from_requirements dists = ws.resolve(reqs, Environment()) File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 786, in resolve raise DistributionNotFound(req, requirers) pkg_resources.DistributionNotFound: The 'parso<0.8.0,>=0.7.0' distribution was not found and is required by jedi </pre>