Overflow Error on Mac with wx2.9.4.0 and Python 2.7/64

wxPython Users
1

Hi,

I've searched but can't find any other mentions of this particular problem. Trying
this test on Mac 10.6.8 with Python 2.7.3/64 and wxPython 2.9.4.0 results in an
OverflowError even though the argument in question is indeed an int.

Test:

{{{
import sys
import wx
app = wx.App()
maxint_32 = 2147483647
maxint_64 = sys.maxint

print maxint_64

def onHighlight(evt): pass

for id_ in (wx.NewId(), 20393, maxint_32, maxint_32+1, maxint_64):
  print id_, isinstance(id_, int)
  app.Bind(wx.EVT_MENU_HIGHLIGHT, onHighlight, id=id_)
}}}

Results:
"""
9223372036854775807
100 True
20393 True
2147483647 True
2147483648 True
Traceback (most recent call last):
  File "t.py", line 13, in <module>
    app.Bind(wx.EVT_MENU_HIGHLIGHT, onHighlight, id=id_)
  File
"/usr/local/lib/wxPython-2.9.4.0/lib/python2.7/site-packages/wx-2.9.4-osx_cocoa/wx/_core.py",
line 4228, in Bind
    event.Bind(self, id, id2, handler)
  File
"/usr/local/lib/wxPython-2.9.4.0/lib/python2.7/site-packages/wx-2.9.4-osx_cocoa/wx/_core.py",
line 4572, in Bind
    target.Connect(id1, id2, et, function)
  File
"/usr/local/lib/wxPython-2.9.4.0/lib/python2.7/site-packages/wx-2.9.4-osx_cocoa/wx/_core.py",
line 4182, in Connect
    return _core_.EvtHandler_Connect(*args, **kwargs)
OverflowError: in method 'EvtHandler_Connect', expected argument 2 of type 'int'
"""

What am I misunderstanding?

Thanks
Paul

2

It's using this function to fetch and check the value:

SWIGINTERN int
SWIG_AsVal_int (PyObject * obj, int *val)
{
   long v;
   int res = SWIG_AsVal_long (obj, &v);
   if (SWIG_IsOK(res)) {
     if ((v < INT_MIN || v > INT_MAX)) {
       return SWIG_OverflowError;
     } else {
       if (val) *val = static_cast< int >(v);
     }
   }
   return res;
}

So it is dependent on the C compiler's definitions for INT_MIN and INT_MAX, not Python's.

···

On 1/7/13 5:32 PM, Paul McNett wrote:

Hi,

I've searched but can't find any other mentions of this particular problem. Trying
this test on Mac 10.6.8 with Python 2.7.3/64 and wxPython 2.9.4.0 results in an
OverflowError even though the argument in question is indeed an int.

Traceback (most recent call last):
   File "t.py", line 13, in <module>
     app.Bind(wx.EVT_MENU_HIGHLIGHT, onHighlight, id=id_)
   File
"/usr/local/lib/wxPython-2.9.4.0/lib/python2.7/site-packages/wx-2.9.4-osx_cocoa/wx/_core.py",
line 4228, in Bind
     event.Bind(self, id, id2, handler)
   File
"/usr/local/lib/wxPython-2.9.4.0/lib/python2.7/site-packages/wx-2.9.4-osx_cocoa/wx/_core.py",
line 4572, in Bind
     target.Connect(id1, id2, et, function)
   File
"/usr/local/lib/wxPython-2.9.4.0/lib/python2.7/site-packages/wx-2.9.4-osx_cocoa/wx/_core.py",
line 4182, in Connect
     return _core_.EvtHandler_Connect(*args, **kwargs)
OverflowError: in method 'EvtHandler_Connect', expected argument 2 of type 'int'
"""

What am I misunderstanding?

--
Robin Dunn
Software Craftsman

3

Thanks. It turns out I was assigning some id's to menu items not by asking wx for
them but just taking them from Python's id() function, which uses huge ints in 64-bit.

So I fixed that problem in my code. :slight_smile:

Paul

···

On 1/9/13 7:47 AM, Robin Dunn wrote:

On 1/7/13 5:32 PM, Paul McNett wrote:

Hi,

I've searched but can't find any other mentions of this particular problem. Trying
this test on Mac 10.6.8 with Python 2.7.3/64 and wxPython 2.9.4.0 results in an
OverflowError even though the argument in question is indeed an int.

Traceback (most recent call last):
   File "t.py", line 13, in <module>
     app.Bind(wx.EVT_MENU_HIGHLIGHT, onHighlight, id=id_)
   File
"/usr/local/lib/wxPython-2.9.4.0/lib/python2.7/site-packages/wx-2.9.4-osx_cocoa/wx/_core.py",

line 4228, in Bind
     event.Bind(self, id, id2, handler)
   File
"/usr/local/lib/wxPython-2.9.4.0/lib/python2.7/site-packages/wx-2.9.4-osx_cocoa/wx/_core.py",

line 4572, in Bind
     target.Connect(id1, id2, et, function)
   File
"/usr/local/lib/wxPython-2.9.4.0/lib/python2.7/site-packages/wx-2.9.4-osx_cocoa/wx/_core.py",

line 4182, in Connect
     return _core_.EvtHandler_Connect(*args, **kwargs)
OverflowError: in method 'EvtHandler_Connect', expected argument 2 of type 'int'
"""

What am I misunderstanding?

It's using this function to fetch and check the value:

SWIGINTERN int
SWIG_AsVal_int (PyObject * obj, int *val)
{
  long v;
  int res = SWIG_AsVal_long (obj, &v);
  if (SWIG_IsOK(res)) {
    if ((v < INT_MIN || v > INT_MAX)) {
      return SWIG_OverflowError;
    } else {
      if (val) *val = static_cast< int >(v);
    }
  }
  return res;
}

So it is dependent on the C compiler's definitions for INT_MIN and INT_MAX, not
Python's.