# Column names
columns_to_transpose_csv = str(sys.argv[2])
id_columns_csv = str(sys.argv[3])
variable_name = str(sys.argv[4])
val_name = str(sys.argv[5])

# pandas data melt and output to CSV
fat_df = pd.read_csv('wide, fat CSV to read in')
skinny_df = pd.melt(fat_df,id_vars='id_columns',var_name=variable_name,value_name=val_name,value_vars=column_to_transpose_list)
skinny_df.to_csv("../output/" + fat_csv +'_transformed.csv',index=False)