def main(files):
logger.info("Starting transform and merging process to {}".format(files))
list_data_frames = []
utils = Utils()
for i in files:
logger.info("Transform process to {}".format(os.path.basename(i)))
key = os.path.basename(i).replace('.csv', '')
transform = Transform(
i, ['year', os.path.basename(i).replace('.csv', '_value')])
df = transform._transform_process()
list_data_frames.append(df)
df = transform._merge_data(list_data_frames, 'year')
df.dropna(inplace=True)
utils._export_transform_dataset(df)
