Set requires-python in pyproject.toml to 3.9 or newer

[o-alquimista]

Issue Description

Currently, the pyproject.toml example contains this:

[project]
requires-python = ">=3.8"

Combined with the code for the setuptools build backend, this creates a broken Python package, because setuptools 77.0.3 requires Python 3.9 or newer.

[build-system]
requires = ["setuptools >= 77.0.3"]
build-backend = "setuptools.build_meta"

Code of Conduct

• I am aware that participants in this repository must follow the PSF Code of Conduct.

[webknjaz]

What's broken there?

[o-alquimista]

On Python 3.8 you get ERROR: No matching distribution found for setuptools>=77.0.3 when trying to build.

Full log:

ERROR: Ignored the following yanked versions: 51.1.0.post20201221, 59.1.0,
60.3.0, 69.3.0, 69.4.0, 71.0.1, 72.0.0
      ERROR: Ignored the following versions that require a different python 
version: 75.4.0 Requires-Python >=3.9; 75.5.0 Requires-Python >=3.9; 75.6.0 
Requires-Python >=3.9; 75.7.0 Requires-Python >=3.9; 75.8.0 Requires-Python 
>=3.9; 75.8.1 Requires-Python >=3.9; 75.8.2 Requires-Python >=3.9; 75.9.0 
Requires-Python >=3.9; 75.9.1 Requires-Python >=3.9; 76.0.0 Requires-Python 
>=3.9; 76.1.0 Requires-Python >=3.9; 77.0.1 Requires-Python >=3.9; 77.0.3 
Requires-Python >=3.9; 78.0.1 Requires-Python >=3.9; 78.0.2 Requires-Python 
>=3.9; 78.1.0 Requires-Python >=3.9
      ERROR: Could not find a version that satisfies the requirement 
setuptools>=77.0.3 (from versions: 0.6b1, 0.6b2, 0.6b3, 0.6b4, 0.6rc1, 0.6rc2, 
0.6rc3, 0.6rc4, 0.6rc5, 0.6rc6, 0.6rc7, 0.6rc8, 0.6rc9, 0.6rc10, 0.6rc11, 0.7.2,
0.7.3, 0.7.4, 0.7.5, 0.7.6, 0.7.7, 0.7.8, 0.8, 0.9, 0.9.1, 0.9.2, 0.9.3, 0.9.4, 
0.9.5, 0.9.6, 0.9.7, 0.9.8, 1.0, 1.1, 1.1.1, 1.1.2, 1.1.3, 1.1.4, 1.1.5, 1.1.6, 
1.1.7, 1.2, 1.3, 1.3.1, 1.3.2, 1.4, 1.4.1, 1.4.2, 2.0, 2.0.1, 2.0.2, 2.1, 2.1.1,
2.1.2, 2.2, 3.0, 3.0.1, 3.0.2, 3.1, 3.2, 3.3, 3.4, 3.4.1, 3.4.2, 3.4.3, 3.4.4, 
3.5, 3.5.1, 3.5.2, 3.6, 3.7, 3.7.1, 3.8, 3.8.1, 4.0, 4.0.1, 5.0, 5.0.1, 5.0.2, 
5.1, 5.2, 5.3, 5.4, 5.4.1, 5.4.2, 5.5, 5.5.1, 5.6, 5.7, 5.8, 6.0.1, 6.0.2, 6.1, 
7.0, 8.0, 8.0.1, 8.0.2, 8.0.3, 8.0.4, 8.1, 8.2, 8.2.1, 8.3, 9.0, 9.0.1, 9.1, 
10.0, 10.0.1, 10.1, 10.2, 10.2.1, 11.0, 11.1, 11.2, 11.3, 11.3.1, 12.0, 12.0.1, 
12.0.2, 12.0.3, 12.0.4, 12.0.5, 12.1, 12.2, 12.3, 12.4, 13.0.1, 13.0.2, 14.0, 
14.1, 14.1.1, 14.2, 14.3, 14.3.1, 15.0, 15.1, 15.2, 16.0, 17.0, 17.1, 17.1.1, 
18.0, 18.0.1, 18.1, 18.2, 18.3, 18.3.1, 18.3.2, 18.4, 18.5, 18.6, 18.6.1, 18.7, 
18.7.1, 18.8, 18.8.1, 19.0, 19.1, 19.1.1, 19.2, 19.3, 19.4, 19.4.1, 19.5, 19.6, 
19.6.1, 19.6.2, 19.7, 20.0, 20.1, 20.1.1, 20.2.2, 20.3, 20.3.1, 20.4, 20.6.6, 
20.6.7, 20.6.8, 20.7.0, 20.8.0, 20.8.1, 20.9.0, 20.10.1, 21.0.0, 21.1.0, 21.2.0,
21.2.1, 21.2.2, 22.0.0, 22.0.1, 22.0.2, 22.0.4, 22.0.5, 23.0.0, 23.1.0, 23.2.0, 
23.2.1, 24.0.0, 24.0.1, 24.0.2, 24.0.3, 24.1.0, 24.1.1, 24.2.0, 24.2.1, 24.3.0, 
24.3.1, 25.0.0, 25.0.1, 25.0.2, 25.1.0, 25.1.1, 25.1.2, 25.1.3, 25.1.4, 25.1.5, 
25.1.6, 25.2.0, 25.3.0, 25.4.0, 26.0.0, 26.1.0, 26.1.1, 27.0.0, 27.1.0, 27.1.2, 
27.2.0, 27.3.0, 27.3.1, 28.0.0, 28.1.0, 28.2.0, 28.3.0, 28.4.0, 28.5.0, 28.6.0, 
28.6.1, 28.7.0, 28.7.1, 28.8.0, 28.8.1, 29.0.0, 29.0.1, 30.0.0, 30.1.0, 30.2.0, 
30.2.1, 30.3.0, 30.4.0, 31.0.0, 31.0.1, 32.0.0, 32.1.0, 32.1.1, 32.1.2, 32.1.3, 
32.2.0, 32.3.0, 32.3.1, 33.1.0, 33.1.1, 34.0.0, 34.0.1, 34.0.2, 34.0.3, 34.1.0, 
34.1.1, 34.2.0, 34.3.0, 34.3.1, 34.3.2, 34.3.3, 34.4.0, 34.4.1, 35.0.0, 35.0.1, 
35.0.2, 36.0.1, 36.1.0, 36.1.1, 36.2.0, 36.2.1, 36.2.2, 36.2.3, 36.2.4, 36.2.5, 
36.2.6, 36.2.7, 36.3.0, 36.4.0, 36.5.0, 36.6.0, 36.6.1, 36.7.0, 36.7.1, 36.7.2, 
36.8.0, 37.0.0, 38.0.0, 38.1.0, 38.2.0, 38.2.1, 38.2.3, 38.2.4, 38.2.5, 38.3.0, 
38.4.0, 38.4.1, 38.5.0, 38.5.1, 38.5.2, 38.6.0, 38.6.1, 38.7.0, 39.0.0, 39.0.1, 
39.1.0, 39.2.0, 40.0.0, 40.1.0, 40.1.1, 40.2.0, 40.3.0, 40.4.0, 40.4.1, 40.4.2, 
40.4.3, 40.5.0, 40.6.0, 40.6.1, 40.6.2, 40.6.3, 40.7.0, 40.7.1, 40.7.2, 40.7.3, 
40.8.0, 40.9.0, 41.0.0, 41.0.1, 41.1.0, 41.2.0, 41.3.0, 41.4.0, 41.5.0, 41.5.1, 
41.6.0, 42.0.0, 42.0.1, 42.0.2, 43.0.0, 44.0.0, 44.1.0, 44.1.1, 45.0.0, 45.1.0, 
45.2.0, 45.3.0, 46.0.0, 46.1.0, 46.1.1, 46.1.2, 46.1.3, 46.2.0, 46.3.0, 46.3.1, 
46.4.0, 47.0.0, 47.1.0, 47.1.1, 47.2.0, 47.3.0, 47.3.1, 47.3.2, 48.0.0, 49.0.0, 
49.0.1, 49.1.0, 49.1.1, 49.1.2, 49.1.3, 49.2.0, 49.2.1, 49.3.0, 49.3.1, 49.3.2, 
49.4.0, 49.5.0, 49.6.0, 50.0.0, 50.0.1, 50.0.2, 50.0.3, 50.1.0, 50.2.0, 50.3.0, 
50.3.1, 50.3.2, 51.0.0, 51.1.0, 51.1.1, 51.1.2, 51.2.0, 51.3.0, 51.3.1, 51.3.2, 
51.3.3, 52.0.0, 53.0.0, 53.1.0, 54.0.0, 54.1.0, 54.1.1, 54.1.2, 54.1.3, 54.2.0, 
56.0.0, 56.1.0, 56.2.0, 57.0.0, 57.1.0, 57.2.0, 57.3.0, 57.4.0, 57.5.0, 58.0.0, 
58.0.1, 58.0.2, 58.0.3, 58.0.4, 58.1.0, 58.2.0, 58.3.0, 58.4.0, 58.5.0, 58.5.1, 
58.5.2, 58.5.3, 59.0.1, 59.1.1, 59.2.0, 59.3.0, 59.4.0, 59.5.0, 59.6.0, 59.7.0, 
59.8.0, 60.0.0, 60.0.1, 60.0.2, 60.0.3, 60.0.4, 60.0.5, 60.1.0, 60.1.1, 60.2.0, 
60.3.1, 60.4.0, 60.5.0, 60.6.0, 60.7.0, 60.7.1, 60.8.0, 60.8.1, 60.8.2, 60.9.0, 
60.9.1, 60.9.2, 60.9.3, 60.10.0, 61.0.0, 61.1.0, 61.1.1, 61.2.0, 61.3.0, 61.3.1,
62.0.0, 62.1.0, 62.2.0, 62.3.0, 62.3.1, 62.3.2, 62.3.3, 62.3.4, 62.4.0, 62.5.0, 
62.6.0, 63.0.0b1, 63.0.0, 63.1.0, 63.2.0, 63.3.0, 63.4.0, 63.4.1, 63.4.2, 
63.4.3, 64.0.0, 64.0.1, 64.0.2, 64.0.3, 65.0.0, 65.0.1, 65.0.2, 65.1.0, 65.1.1, 
65.2.0, 65.3.0, 65.4.0, 65.4.1, 65.5.0, 65.5.1, 65.6.0, 65.6.1, 65.6.2, 65.6.3, 
65.7.0, 66.0.0, 66.1.0, 66.1.1, 67.0.0, 67.1.0, 67.2.0, 67.3.1, 67.3.2, 67.3.3, 
67.4.0, 67.5.0, 67.5.1, 67.6.0, 67.6.1, 67.7.0, 67.7.1, 67.7.2, 67.8.0, 68.0.0, 
68.1.0, 68.1.2, 68.2.0, 68.2.1, 68.2.2, 69.0.0, 69.0.1, 69.0.2, 69.0.3, 69.1.0, 
69.1.1, 69.2.0, 69.3.1, 69.4.1, 69.4.2, 69.5.0, 69.5.1, 70.0.0, 70.1.0, 70.1.1, 
70.2.0, 70.3.0, 71.0.0, 71.0.2, 71.0.3, 71.0.4, 71.1.0, 72.1.0, 72.2.0, 73.0.0, 
73.0.1, 74.0.0, 74.1.0, 74.1.1, 74.1.2, 74.1.3, 75.0.0, 75.1.0, 75.2.0, 75.3.0, 
75.3.1, 75.3.2)
      ERROR: No matching distribution found for setuptools>=77.0.3

[webknjaz]

Oh, I didn't realize. You're right. Feel free to send a PR.

[o-alquimista]

Created PR #1846