Error when installing typing package with pyproject.toml

[melav99]

When I try to install the package from the local archive, I face an error in the pyrpoject.toml. However, I am completely clueless as to why I am getting this error. I am running python3.9 on PuTTy though a local Linux computer on a controller.

# python3 -m pip install typing_extensions-4.3.0.tar.gz                                                                                                                                      Processing ./typing_extensions-4.3.0.tar.gz
ERROR: Exception:
Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/pip/_internal/cli/base_command.py", line 186, in _main
  File "/usr/lib/python3.9/site-packages/pip/_internal/commands/install.py", line 331, in run
  File "/usr/lib/python3.9/site-packages/pip/_internal/legacy_resolve.py", line 177, in resolve
  File "/usr/lib/python3.9/site-packages/pip/_internal/legacy_resolve.py", line 333, in _resolve_one
  File "/usr/lib/python3.9/site-packages/pip/_internal/legacy_resolve.py", line 282, in _get_abstract_dist_for
  File "/usr/lib/python3.9/site-packages/pip/_internal/operations/prepare.py", line 515, in prepare_linked_requirement
  File "/usr/lib/python3.9/site-packages/pip/_internal/operations/prepare.py", line 95, in _get_prepared_distribution
  File "/usr/lib/python3.9/site-packages/pip/_internal/distributions/sdist.py", line 33, in prepare_distribution_metadata
  File "/usr/lib/python3.9/site-packages/pip/_internal/req/req_install.py", line 512, in load_pyproject_toml
  File "/usr/lib/python3.9/site-packages/pip/_internal/pyproject.py", line 75, in load_pyproject_toml
  File "/usr/lib/python3.9/site-packages/pip/_vendor/pytoml/parser.py", line 11, in load
  File "/usr/lib/python3.9/site-packages/pip/_vendor/pytoml/parser.py", line 24, in loads
  File "/usr/lib/python3.9/site-packages/pip/_vendor/pytoml/parser.py", line 341, in _p_toml
  File "/usr/lib/python3.9/site-packages/pip/_vendor/pytoml/parser.py", line 123, in expect_eof
  File "/usr/lib/python3.9/site-packages/pip/_vendor/pytoml/parser.py", line 163, in _expect
pip._vendor.pytoml.core.TomlError: /tmp/pip-req-build-tyj1unq3/pyproject.toml(13, 1): msg

[srittau]

@melav99 What pip version are you using? (python3 -m pip --version)

[melav99]

pip 20.0.2

[srittau]

I can reproduce this with pip 20.0.2, but not with 20.3.4. If you are able to upgrade pip, this should solve the problem for you. pip 20.0.2 probably uses an outdated toml parser. That said, if there is an easy way to fix our pyproject.toml file to work with old pip versions, we should do that.