Compatibility with both Python 2(.7) and 3

demo/binary_classification/mapfeat.py

@@ -24,7 +24,7 @@ def loadfmap( fname ):
     return fmap, nmap
 
 def write_nmap( fo, nmap ):    
-    for i in xrange( len(nmap) ):
+    for i in range( len(nmap) ):
         fo.write('%d\t%s\ti\n' % (i, nmap[i]) )
 
 # start here
@@ -41,7 +41,7 @@ for l in open( 'agaricus-lepiota.data' ):
     else:
         assert arr[0] == 'e'
         fo.write('0')
-    for i in xrange( 1,len(arr) ):
+    for i in range( 1,len(arr) ):
         fo.write( ' %d:1' % fmap[i][arr[i].strip()] )
     fo.write('\n')
 

demo/binary_classification/mknfold.py

@@ -3,7 +3,7 @@ import sys
 import random
 
 if len(sys.argv) < 2:
-    print 'Usage:<filename> <k> [nfold = 5]'
+    print ('Usage:<filename> <k> [nfold = 5]')
     exit(0)
 
 random.seed( 10 )