KeyError(key) Error in Pytest cx_Oracle connection error

Question

Hey I tried to connect oracle db in pytest It shows following error raise KeyError(key) KeyError: 'db'

code

@pytest.fixture
def session(): 
    config_file="dataflow.ini"
    config_path = "%s/%s" % (os.path.dirname(os.path.abspath(sys.argv[0])),config_file)
    config_ini = configparser.ConfigParser()
    config_ini.read(config_path)
    print("db" in config_ini)
    # create oracle connection
    dsn_tns = cx_Oracle.makedsn(config_ini['db']['host'], config_ini['db']['port'], 
    config_ini['db']['sid'])
    dbs = cx_Oracle.Connection(config_ini['db']['user'], config_ini['db']['passwd'],dsn_tns)
    db_session = dbs.cursor()
    # db_session = connection.cursor()
    yield db_session
    connection.close()

dataflow.ini

[db]
sid=****
user=***
passwd=*****
host=****
port=****
[encryption]
key=********

Traceback error

self = <configparser.ConfigParser object at 0x7f01c9b93198>, key = 'db'

def __getitem__(self, key):
    if key != self.default_section and not self.has_section(key):

      raise KeyError(key)

E KeyError: 'db'

/usr/lib64/python3.6/configparser.py:959: KeyError -------------------------------------------------- Captured stdout setup -------------------------------------------------- False ================================================= short test summary info ================================================= ERROR scripts/pytest_test_vai.py::test_get - KeyError: 'db' ==================================================== 1 error in 1.13s =====================================================