@staticmethod
def prepareKeyValue(outputData, key, value):
    """ This function will append key and value in 
            outputData
            if variable key exist, it will rename by
                    key1, key2, ...
        """
    for i in range(1, 100):
        var = '$(' + key + str(i) + ')'
        if not outputData.get(var, None):
            outputData[var] = value
            return var
        else:
            continue
