fix backcall

packages/python/yap_kernel/yap_ipython/core/events.py

@@ -13,7 +13,7 @@ events and the arguments which will be passed to them.
    This API is experimental in yap_ipython 2.0, and may be revised in future versions.
 """
 
-from yap_ipython.core.backcall import callback_prototype
+from backcall import callback_prototype
 
 
 class EventManager(object):

packages/python/yap_kernel/yap_ipython/yapi.py

@@ -727,7 +727,6 @@ class YAPRun:
             self.result.result = False
         has_raised = False
         try:
-            builtin_mod.input = self.shell.sys_raw_input
             self.yapeng.mgoal(streams(True),"user", True)
             if cell.strip('\n \t'):
                 #create a Trace object, telling it what to ignore, and whether to