How to install `distro-info===0.18ubuntu0.18.04.1`?-CodePudding

Trying to modernize an old Django project (2.2), and its requirements.txt (generated via pip freeze) has some lines that make pip install throw fits:

distro-info===0.18ubuntu0.18.04.1

I interpreted the errors I got for the first one (see the error output in its entirety at the bottom) as the version string not conforming to PEP-518, but it doesn't even mention the === operator. This SO thread, What are triple equal signs and ubuntu2 in Python pip freeze?, has a similar issue, but:

The errors they got is different (ValueError as opposed to my ParseError).
The solution was to upgrade pip, but I'm already using the latest one.

Now, pip install distro-info works so should I just go with that?

update: The project I'm trying to update has been conceived around 2020, and according to the PyPI history of distro-info, it had a 0.10 release in 2013 and a 1.0 in 2021. Could this anything have to do with the weird pip freeze output? (From this PyPI support issue.)

The error:

ERROR: Exception:
Traceback (most recent call last):
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3021, in _dep_map
    return self.__dep_map
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2815, in __getattr__
    raise AttributeError(attr)
AttributeError: _DistInfoDistribution__dep_map

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_vendor/packaging/requirements.py", line 102, in __init__
    req = REQUIREMENT.parseString(requirement_string)
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_vendor/pyparsing/core.py", line 1141, in parse_string
    raise exc.with_traceback(None)
pip._vendor.pyparsing.exceptions.ParseException: Expected string_end, found '('  (at char 12), (line:1, col:13)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3101, in __init__
    super(Requirement, self).__init__(requirement_string)
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_vendor/packaging/requirements.py", line 104, in __init__
    raise InvalidRequirement(
pip._vendor.packaging.requirements.InvalidRequirement: Parse error at "'(===0.18'": Expected string_end

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_internal/cli/base_command.py", line 160, in exc_logging_wrapper
    status = run_func(*args)
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_internal/cli/req_command.py", line 247, in wrapper
    return func(self, options, args)
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_internal/commands/install.py", line 400, in run
    requirement_set = resolver.resolve(
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/resolver.py", line 92, in resolve
    result = self._result = resolver.resolve(
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_vendor/resolvelib/resolvers.py", line 481, in resolve
    state = resolution.resolve(requirements, max_rounds=max_rounds)
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_vendor/resolvelib/resolvers.py", line 373, in resolve
    failure_causes = self._attempt_to_pin_criterion(name)
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_vendor/resolvelib/resolvers.py", line 213, in _attempt_to_pin_criterion
    criteria = self._get_updated_criteria(candidate)
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_vendor/resolvelib/resolvers.py", line 203, in _get_updated_criteria
    for requirement in self._p.get_dependencies(candidate=candidate):
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/provider.py", line 237, in get_dependencies
    return [r for r in candidate.iter_dependencies(with_requires) if r is not None]
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/provider.py", line 237, in <listcomp>
    return [r for r in candidate.iter_dependencies(with_requires) if r is not None]
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 247, in iter_dependencies
    requires = self.dist.iter_dependencies() if with_requires else ()
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_internal/metadata/pkg_resources.py", line 216, in iter_dependencies
    return self._dist.requires(extras)
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2736, in requires
    dm = self._dep_map
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3023, in _dep_map
    self.__dep_map = self._compute_dependencies()
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3033, in _compute_dependencies
    reqs.extend(parse_requirements(req))
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3094, in parse_requirements
    yield Requirement(line)
  File "/home/old-django-project/.venv/lib/python3.10/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3103, in __init__
    raise RequirementParseError(str(e))
pip._vendor.pkg_resources.RequirementParseError: Parse error at "'(===0.18'": Expected string_end

CodePudding user response：

Looks like your library was discontinued. In PyPi, infact, I can see there are only 1.0 and 0.10. If you need that specific version, then you need to setup a manual installation, downloading the source here. Either, you can upgrade your version and try to refactor any possible problem coming after!

In case, if you need to dockerize your app, setting up a script for the manual installation of a library is simple.