How Can I resolve this error:

Real_Expectation_Value = 2 * rawResult[0].value.counts["0"] / 
sum(rawResult[0].value.counts.values()) - 1

sorry. I am new in python and appreciate any help. The following code is the main code:

from classiq import set_execution_preferences
from classiq import create_model
from classiq.execution import ExecutionPreferences
NumShots=[1000,2000,4000,8000,6000]
RealExpect=[]
Theoretical_realexpectation=[]
for numShots in NumShots:
    quantumModel=create_model(main)
    quantum_model_with_execution_preferences = set_execution_preferences(
    quantumModel,
    ExecutionPreferences(
    num_shots=numShots, job_name="Hadamard Test", random_seed=767
     ),
    )
    synthesize(quantumModel)
    rawResult=execute(synthesize(quantumModel)).result()
    countS=rawResult[0].value.counts
    Real_Expectation_Value = 2 * rawResult[0].value.counts["0"] / 
    sum(rawResult[0].value.counts.values()) - 1