diff --git a/meta_data_analysis/kd.py b/meta_data_analysis/kd.py
index 0081eef..a986175 100644
--- a/meta_data_analysis/kd.py
+++ b/meta_data_analysis/kd.py
@@ -18,11 +18,11 @@ import pandas as pd
 import numpy as np
 import sys, os
 #%%
-# specify variables
+# specify input and output variables
+homedir = os.path.expanduser('~')
 #=======
 # input
 #=======
-homedir = os.path.expanduser('~')
 indir = 'git/Data/pyrazinamide/input/original'
 in_filename = "3pl1.fasta.txt"
 infile = homedir + '/' + indir + '/' + in_filename