pip 8.1.1 está fallando con el error "UndefinedEnvironmentName: 'extra' no existe en el entorno de evaluación". cuando intento instalar un paquete que usa extras_require (django-constance [database])
La degradación a pip 8.1.0 resuelve el problema.
En un virtualenv limpio, con setuptools == 21.0.0, estoy ejecutando
pip install 'django-constance[database]==1.1.2'
que falla con:
Collecting django-constance[database]==1.1.2
Downloading django_constance-1.1.2-py2.py3-none-any.whl
Exception:
Traceback (most recent call last):
File "/home/johnc/.virtualenvs/pip_8_1_1/local/lib/python2.7/site-packages/pip/basecommand.py", line 209, in main
status = self.run(options, args)
File "/home/johnc/.virtualenvs/pip_8_1_1/local/lib/python2.7/site-packages/pip/commands/install.py", line 328, in run
wb.build(autobuilding=True)
File "/home/johnc/.virtualenvs/pip_8_1_1/local/lib/python2.7/site-packages/pip/wheel.py", line 748, in build
self.requirement_set.prepare_files(self.finder)
File "/home/johnc/.virtualenvs/pip_8_1_1/local/lib/python2.7/site-packages/pip/req/req_set.py", line 360, in prepare_files
ignore_dependencies=self.ignore_dependencies))
File "/home/johnc/.virtualenvs/pip_8_1_1/local/lib/python2.7/site-packages/pip/req/req_set.py", line 448, in _prepare_file
req_to_install, finder)
File "/home/johnc/.virtualenvs/pip_8_1_1/local/lib/python2.7/site-packages/pip/req/req_set.py", line 387, in _check_skip_installed
req_to_install.check_if_exists()
File "/home/johnc/.virtualenvs/pip_8_1_1/local/lib/python2.7/site-packages/pip/req/req_install.py", line 997, in check_if_exists
self.satisfied_by = pkg_resources.get_distribution(self.req)
File "/home/johnc/.virtualenvs/pip_8_1_1/share/python-wheels/pkg_resources-0.0.0-py2.py3-none-any.whl/pkg_resources/__init__.py", line 535, in get_distribution
dist = get_provider(dist)
File "/home/johnc/.virtualenvs/pip_8_1_1/share/python-wheels/pkg_resources-0.0.0-py2.py3-none-any.whl/pkg_resources/__init__.py", line 415, in get_provider
return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
File "/home/johnc/.virtualenvs/pip_8_1_1/share/python-wheels/pkg_resources-0.0.0-py2.py3-none-any.whl/pkg_resources/__init__.py", line 943, in require
needed = self.resolve(parse_requirements(requirements))
File "/home/johnc/.virtualenvs/pip_8_1_1/share/python-wheels/pkg_resources-0.0.0-py2.py3-none-any.whl/pkg_resources/__init__.py", line 808, in resolve
if not req_extras.markers_pass(req):
File "/home/johnc/.virtualenvs/pip_8_1_1/share/python-wheels/pkg_resources-0.0.0-py2.py3-none-any.whl/pkg_resources/__init__.py", line 993, in markers_pass
return not req.marker or any(extra_evals) or req.marker.evaluate()
File "/home/johnc/.virtualenvs/pip_8_1_1/share/python-wheels/pkg_resources-0.0.0-py2.py3-none-any.whl/pkg_resources/_vendor/packaging/markers.py", line 278, in evaluate
return _evaluate_markers(self._markers, current_environment)
File "/home/johnc/.virtualenvs/pip_8_1_1/share/python-wheels/pkg_resources-0.0.0-py2.py3-none-any.whl/pkg_resources/_vendor/packaging/markers.py", line 203, in _evaluate_markers
lhs_value = _get_env(environment, lhs.value)
File "/home/johnc/.virtualenvs/pip_8_1_1/share/python-wheels/pkg_resources-0.0.0-py2.py3-none-any.whl/pkg_resources/_vendor/packaging/markers.py", line 185, in _get_env
"{0!r} does not exist in evaluation environment.".format(name)
UndefinedEnvironmentName: 'extra' does not exist in evaluation environment.
Si lo ejecuto sin un especificador de versión, obtengo un error diferente:
pip install 'django-constance[database]'
da
Exception:
Traceback (most recent call last):
File "/home/johnc/.virtualenvs/pip_8_1_1/local/lib/python2.7/site-packages/pip/basecommand.py", line 209, in main
status = self.run(options, args)
File "/home/johnc/.virtualenvs/pip_8_1_1/local/lib/python2.7/site-packages/pip/commands/install.py", line 305, in run
wheel_cache
File "/home/johnc/.virtualenvs/pip_8_1_1/local/lib/python2.7/site-packages/pip/basecommand.py", line 270, in populate_requirement_set
wheel_cache=wheel_cache
File "/home/johnc/.virtualenvs/pip_8_1_1/local/lib/python2.7/site-packages/pip/req/req_install.py", line 234, in from_line
extras).extras
File "/home/johnc/.virtualenvs/pip_8_1_1/share/python-wheels/pkg_resources-0.0.0-py2.py3-none-any.whl/pkg_resources/__init__.py", line 2833, in parse
req, = parse_requirements(s)
File "/home/johnc/.virtualenvs/pip_8_1_1/share/python-wheels/pkg_resources-0.0.0-py2.py3-none-any.whl/pkg_resources/__init__.py", line 2781, in parse_requirements
yield Requirement(line)
File "/home/johnc/.virtualenvs/pip_8_1_1/share/python-wheels/pkg_resources-0.0.0-py2.py3-none-any.whl/pkg_resources/__init__.py", line 2790, in __init__
raise RequirementParseError(str(e))
RequirementParseError: Invalid requirement, parse error at "'__placeh'"
setup.py de django-constance como referencia: https://github.com/jazzband/django-constance/blob/master/setup.py
Hmm, tal vez no sea un error: reinstalar pip con
pip install -U pip --force-reinstall
parece haber arreglado esto para mí.
Esto no me soluciona.
Este hilo se ha bloqueado automáticamente ya que no ha habido ninguna actividad reciente después de que se cerró. Abra un nuevo problema para errores relacionados.
Comentario más útil
Hmm, tal vez no sea un error: reinstalar pip con
parece haber arreglado esto para mí.