diff --git a/boxx/tool/toolFunction.py b/boxx/tool/toolFunction.py
index 88e9816..41f1714 100644
--- a/boxx/tool/toolFunction.py
+++ b/boxx/tool/toolFunction.py
@@ -63,7 +63,7 @@ def interFun():
             maxTimes[0] -= 1
             if maxTimes[0] <= 0:
                 return 
-        setTimeOut(interFun, inter)
+        setTimeout(interFun, inter)
     interFun()
 
 from multiprocessing import Pool as PoolMp
@@ -239,7 +239,7 @@ def f():
                 r = fun(*l,**kv)
             finally:
                 self.left += 1
-        self.l.append(setTimeOut(f))
+        self.l.append(setTimeout(f))
         if len(self.l)>100:
             self.l = self.l[-90:]
     f = lambda fun,*l,**kv:fun(*l,**kv) #用于测试单线程的性能
diff --git a/boxx/tool/toolLog.py b/boxx/tool/toolLog.py
index 849b7d9..b4be6d8 100644
--- a/boxx/tool/toolLog.py
+++ b/boxx/tool/toolLog.py
@@ -3,6 +3,8 @@
 from __future__ import unicode_literals
 from __future__ import print_function
 
+import executing
+
 from .toolStructObj import addCall, dicto, FunAddMagicMethod, getfathers, typeNameOf, typestr
 from .toolSystem import getRootFrame, getFatherFrames
 from ..ylsys import py2
@@ -10,6 +12,7 @@
 from ..ylcompat import istype
 
 import os,sys,time
+import ast
 import math
 import re
 from collections import defaultdict
@@ -931,6 +934,17 @@ def __setattr__(self, name, v):
         log = global_g_paras[id(self)].log
         transport = TransportToRootFrame(name,log)
         transport(v)
+
+    def __pow__(self, v):
+        ex = executing.Source.executing(sys._getframe(1))
+        op = ex.node.right
+        if not isinstance(op, ast.Name):
+            raise TypeError('Only variables can be transported directly')
+        self.__setattr__(op.id, v)
+
+    __sub__ = __truediv__ = __div__ = __mul__ = __add__ = __eq__ = __pow__
+
+
 g = GlobalG()
 gg = GlobalG(log=True)
 
@@ -1170,7 +1184,11 @@ def printt(self, x=None):
             else:
                 pass
 #                pblue('%s: %s'%(clf.p%'As pp by p', x))
-                print(x)
+                try:
+                    ex = executing.Source.executing(sys._getframe(1))
+                    print(ex.source.asttokens().get_text(ex.node.right), '=', x)
+                except:
+                    print(x)
             return x
         __sub__ = printt
         __lshift__ = printt
diff --git a/requirements.txt b/requirements.txt
index 3af1b56..a8fd9fe 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,3 +8,5 @@ snakeviz
 fn
 pyopengl
 seaborn
+executing
+asttokens