Enable optional exponential mutation count

gte/__main__.py

@@ -60,6 +60,9 @@ parser_evolve.add_argument('--max-generation', '-G', type=int, metavar='N',
 
 parser_evolve.add_argument('--log-progs', '-L', type=str, metavar='FILENAME',
                            default=None)
+parser_evolve.add_argument('--exp-mutate', '-E', action='store_const',
+                           default=False, const=True,
+                           help="If True make 2**copy_num mutation")
 
 parser_evolve.add_argument('--quiet', '-q', action='store_const',
                            default=False, const=True)
@@ -148,7 +151,10 @@ if 'pool_size' in args:
         for prog in [ prog for _, prog in scores[:len(scores)//keep_div]]:
             progs.append(prog)
             for cur_mut in range(keep_div - 1):
-                progs.append(mutate(prog, force=True, mutcount= 2**cur_mut))
+                if args.exp_mutate:
+                    progs.append(mutate(prog, force=True, mutcount=2**cur_mut))
+                else:
+                    progs.append(mutate(prog, force=True, mutcount=1))
                 if len(progs) >= args.pool_size:
                     break
             if len(progs) >= args.pool_size: