LuigiTomlParser object has no attribute 'sections'

[mzpqnxow]

Missing/incorrect method when loading TOML configuration data

When loading a TOML configuration file on Luigi==3.1.0, I get the following backtrace:

Traceback (most recent call last):
  File "/home/user/luigi-test-proj/venv/bin/luigi", line 8, in <module>
    sys.exit(luigi_run())
  File "/home/user/luigi-test-proj/venv/lib/python3.9/site-packages/luigi/cmdline.py", line 9, in luigi_run
    run_with_retcodes(argv)
  File "/home/user/luigi-test-proj/venv/lib/python3.9/site-packages/luigi/retcodes.py", line 71, in run_with_retcodes
    retcodes = retcode()
  File "/home/user/luigi-test-proj/venv/lib/python3.9/site-packages/luigi/task_register.py", line 87, in __call__
    param_values = cls.get_param_values(params, args, kwargs)
  File "/home/user/luigi-test-proj/venv/lib/python3.9/site-packages/luigi/task.py", line 439, in get_param_values
    if task_family in conf.sections():
AttributeError: 'LuigiTomlParser' object has no attribute 'sections'

When I take a look at the LuigiTomlParser, it's pretty easy to see a way to fix this with minimal effort, by adding a sections() method that just returns a simple list of the sections-

+    def sections(self):
+        """Return a list of sections as list of strings"""
+        return [section for section in self.data.keys() if section.lower() != 'logging']
+

I will attach my configuration file, though it's worth mentioning the example toml from this repo also causes the issue