Fixtures are functions that initialize test functions to enable tests executed robustly by providing a steady base. They are used with fixture annotation. In order to determine its scope, a scope parameter is added to the annotation below

• each test (function), 
• class, 
• session, 
• module, 
• or package.

    #Test data must be created according to the current date/time before each session:
@pytest.fixture(scope="session")
def example_fixture():
    #a fixture example that runs before each session to create test data
    #In this way, the test data is created automatically right before the session starts without any third-party code execution.
    #The user must be login before each test:
@pytest.fixture(scope="function")
def example_fixture():
    #a fixture example that runs before each test to login.