[python] simplify param aliases handling

[StrikerRUS]

get() can handle multiple param names at one call.

LightGBM/python-package/lightgbm/basic.py

Lines 348 to 353 in 066720e

	@classmethod
	def get(cls, *args):
	ret = set()
	for i in args:
	ret |= cls.aliases.get(i, {i})
	return ret

[jameslamb]

Oh nice! First time I've seen |= before.

[github-actions]

This pull request has been automatically locked since there has not been any recent activity since it was closed. To start a new related discussion, open a new issue at https://github.com/microsoft/LightGBM/issues including a reference to this.