[ Python 常見問題 ] Pytest - How to get the current test's name from the setup method?

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Question
I am using py.test and wonder if/how it is possible to retrieve the name of the currently executed test within the setup method that is invoked before running each test. Consider this code:

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1. class TestSomething(object):  
2.   
3.     def setup(self):  
4.         test_name = ...  
5.   
6.     def teardown(self):  
7.         pass  
8.   
9.     def test_the_power(self):  
10.         assert "foo" != "bar"  
11.   
12.     def test_something_else(self):  
13.         assert True  

Right before TestSomething.test_the_power becomes executed, I would like to have access to this name in setup as outlined in the code via test_name = ... so that test_name == "TestSomething.test_the_power".

HowTo
You can also use the PYTEST_CURRENT_TEST environment variable set by pytest for each test case. (PYTEST_CURRENT_TEST environment variable) To get just the test name:

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1. os.environ.get('PYTEST_CURRENT_TEST').split(':')[-1].split(' ')[0]