def setup_function(function):
 print('\n--------------------')
 print('函数执行前所做的操作')
print('\n--------------------')
 def teardown_function(function):
print('\n--------------------')
 print('函数执行后所做的操作')
print('\n--------------------')
def test_function_1():
print('\n测试函数1')
def test_function_2():
 print('\n测试函数2')
if __name__ == '__main__':
import pytest
pytest.main(['-sq', 'functionLevel.py'])

functionLevel.py 
--------------------
函数执行前所做的操作
--------------------
测试函数1
--------------------
函数执行后所做的操作
--------------------
--------------------
函数执行前所做的操作
--------------------
测试函数2
--------------------
函数执行后所做的操作
--------------------
[100%]
========================== 2 passed in 0.03 seconds ===========================

 class TestMethod(object):
 def setup_method(self, method):
 print('\n--------------------')
 print('方法执行前所做的操作')
 print('\n--------------------')
 def teardown_method(self, method):
 print('\n--------------------')
print('方法执行后所做的操作')
print('\n--------------------')
def test_method_1(self):
print('\n测试方法1')
def test_method_2(self):
print('\n测试方法2')
if __name__ == '__main__':
import pytest
pytest.main(['-sq', 'methodLevel.py'])

methodLevel.py 
--------------------
方法执行前所做的操作
--------------------
测试方法1
--------------------
方法执行后所做的操作
--------------------
--------------------
方法执行前所做的操作
--------------------
测试方法2
--------------------
方法执行后所做的操作
--------------------
[100%]
========================== 2 passed in 0.03 seconds ===========================

 class TestClass(object): 
 @classmethod
 def setup_class(cls):
 print('\nsetup_class() for {}'.format(cls.__name__)) 
 @classmethod
def teardown_class(cls):
 print('\nteardown_class() for {}'.format(cls.__name__))
def test_1(self):
 print('self.test_1()')
def test_2(self):
print('self.test_2()')
if __name__ == '__main__':
import pytest
 pytest.main(['-sq', 'classLevel.py'])

classLevel.py 
setup_class() for TestClass
.self.test_1()
.self.test_2()
teardown_class() for TestClass
[100%]
========================== 2 passed in 0.06 seconds ===========================

def setup_module(module):
 print('\nsetup_module() for {}'.format(module.__name__))
def teardown_module(module):
 print('\nteardown_module() for {}'.format(module.__name__))
def test_1():
 print('test_1()') 
def test_2():
print('test_2()')
class TestClass(object):
def test_3(self):
print('self.test_3()')
def test_4(self):
print('self.test_4()')
if __name__ == '__main__':
 import pytest
pytest.main(['-sq', 'moduleLevel.py'])

moduleLevel.py 
setup_module() for moduleLevel
.test_1()
.test_2()
.self.test_3()
.self.test_4()
teardown_module() for moduleLevel
[100%]
========================== 4 passed in 0.04 seconds ===========================