Code not working in Python 3.12

[mattiaverga]

python-sgp4/sgp4/tests.py

Lines 37 to 38 in fac882a

	assertRaisesRegex = getattr(_testcase, 'assertRaisesRegex',
	_testcase.assertRaisesRegexp)

This code is not working anymore in python 3.12: it seems that the default value is evaluated before the attribute is returned:
AttributeError: 'TestCase' object has no attribute 'assertRaisesRegexp'. Did you mean: 'assertRaisesRegex'?

I have quickly patched with
assertRaisesRegex = getattr(_testcase, 'assertRaisesRegex', None) or _testcase.assertRaisesRegexp
but perhaps there's a better way.