为所有pytest测试执行一组语句的优雅方法是什么？

Question

我正在编写我的第一个py.test测试，我编写了类似下面的测试

{
"Version": "2012-10-17",
"Statement": [
    {
        "Sid": "Example permissions",
        "Effect": "Allow",
        "Principal": {
            "AWS": "arn:aws:iam::123456789:user/jerdak"
        },
        "Action": [
            "s3:GetBucketLocation",
            "s3:ListBucket"
        ],
        "Resource": [
            "arn:aws:s3:::my_bucket"
        ]
    }
]
}

所以我决定写一个函数

class Test_X_Values(object):
   def test_value_1(self, fix_A):
       A = fix_A['first']
       B = fix_A['second']
       # some statements here
       #the following part is common for all
       if ( A.X == True and B.Y == True):
           #perform something. for example
           print 'performing'

   def test_value_2(self, fix_A):
       #some statements
       if ( A.X == True and B.Y == True):
           #perform something. for example
           print 'performing'

是否有任何优雅的方式来执行此功能＆＃39;检查＆＃39;在每次测试结束时，除了在每次测试结束时写入支票（A，B）之外？