Compatibility with both Python 2(.7) and 3

demo/regression/mapfeat.py

@@ -7,7 +7,7 @@ fmap = {}
 for l in open( 'machine.data' ):
     arr = l.split(',')
     fo.write(arr[8])
-    for i in xrange( 0,6 ):
+    for i in range( 0,6 ):
         fo.write( ' %d:%s' %(i,arr[i+2]) )
     
     if arr[0] not in fmap:
@@ -24,9 +24,9 @@ fo = open('featmap.txt', 'w')
 # list from machine.names
 names = ['vendor','MYCT', 'MMIN', 'MMAX', 'CACH', 'CHMIN', 'CHMAX', 'PRP', 'ERP' ]; 
 
-for i in xrange(0,6):
+for i in range(0,6):
     fo.write( '%d\t%s\tint\n' % (i, names[i+1]))
 
-for v, k in sorted( fmap.iteritems(), key = lambda x:x[1] ):
+for v, k in sorted( fmap.items(), key = lambda x:x[1] ):
     fo.write( '%d\tvendor=%s\ti\n' % (k, v))
 fo.close()