text: import pandas as pd
  import os
  
  import pandas as pd
  import os
  from glob import glob
  def merge_results(results_dir):
  	main_df = pd.DataFrame()
  	for file in glob(results_dir):
  		df = pd.read_csv(file, index_col=0)
  		main_df = pd.concat([main_df,df])
  	return main_df
  