add dump nice to regression demo

demo/regression/mapfeat.py

@@ -10,12 +10,23 @@ for l in open( 'machine.data' ):
     for i in xrange( 0,6 ):
         fo.write( ' %d:%s' %(i,arr[i+2]) )
     
-    if arr[0] not in fmap.keys():
+    if arr[0] not in fmap:
         fmap[arr[0]] = cnt
         cnt += 1
     
-    fo.write( ' %d:1' % fmap[arr[0]] )
-	
+    fo.write( ' %d:1' % fmap[arr[0]] )	
     fo.write('\n')
 
 fo.close()
+
+# create feature map for machine data
+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):
+    fo.write( '%d\t%s\tint\n' % (i, names[i+1]))
+
+for v, k in sorted( fmap.iteritems(), key = lambda x:x[1] ):
+    fo.write( '%d\tvendor=%s\ti\n' % (k, v))
+fo.close()