Python3.6 and earlier do not have annotations

[juliantos]

https://github.com/danni/python-pkcs11/blob/e35e6c45e3dcaaa1511262121ff4ab6769de941e/setup.py#L57
to

'setuptools_scm ; python_version >= "3.7"'
'setuptools_scm < 7 ; python_version < "3.7"'

This fixes this error from occurring and still allows for python-pkcs11 to build:

Processing /home/user/python-pkcs11-0.7.0
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-req-build-nbtjcoj1/setup.py", line 60, in <module>
        test_suite='tests',
      File "/home/user/.pyenv/versions/3.6.15/lib/python3.6/site-packages/setuptools/__init__.py", line 143, in setup
        return distutils.core.setup(**attrs)
      File "/home/user/.pyenv/versions/3.6.15/lib/python3.6/distutils/core.py", line 108, in setup
        _setup_distribution = dist = klass(attrs)
      File "/home/user/.pyenv/versions/3.6.15/lib/python3.6/site-packages/setuptools/dist.py", line 442, in __init__
        k: v for k, v in attrs.items()
      File "/home/user/.pyenv/versions/3.6.15/lib/python3.6/distutils/dist.py", line 281, in __init__
        self.finalize_options()
      File "/home/user/.pyenv/versions/3.6.15/lib/python3.6/site-packages/setuptools/dist.py", line 601, in finalize_options
        ep.load()(self, ep.name, value)
      File "/home/user/.pyenv/versions/3.6.15/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2346, in load
        return self.resolve()
      File "/home/user/.pyenv/versions/3.6.15/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2352, in resolve
        module = __import__(self.module_name, fromlist=['__name__'], level=0)
      File "/tmp/pip-req-build-nbtjcoj1/.eggs/setuptools_scm-7.1.0-py3.6.egg/setuptools_scm/__init__.py", line 5
        from __future__ import annotations
        ^
    SyntaxError: future feature annotations is not defined

[bhagwatvyas]

@jsantos18 have you been able to get around this issue?

[juliantos]

If you manually specify which setuptools_scm to install via pip beforehand then it works on a fresh pip install.

[NiviPari]

@jsantos18 Have introduced this already and tried , still getting the same issue : "setuptools_scm < 7"