python3 broken backtrace + typo

[HJarausch]

Try the code snippet below, do one single step which raises an exception.
Enter 'e' to show the exception. This kills pudb .
The reason is that the second component of

exc_tuple

is a string object while traceback/format_exception excepts it to be of type

Exception

.

Furthermore there is a typo in shell.py (line 27)

-    except Exception, e:
+    except Exception as e:

Thanks for looking into it,
Helmut.

# !/usr/bin/python3

from pudb import set_trace
L=['a','b','c']
set_trace()
i= L.index('e')

"""
Traceback (most recent call last):
  File "PUDB_T.py", line 7, in 
    i= L.index('e')
  File "/usr/lib64/python3.3/bdb.py", line 53, in trace_dispatch
    return self.dispatch_exception(frame, arg)
  File "/usr/lib64/python3.3/bdb.py", line 94, in dispatch_exception
    self.user_exception(frame, arg)
  File "/usr/lib64/python3.3/site-packages/pudb/debugger.py", line 279, in user_exception
    self.interaction(frame, exc_tuple)
  File "/usr/lib64/python3.3/site-packages/pudb/debugger.py", line 226, in interaction
    show_exc_dialog=show_exc_dialog)
  File "/usr/lib64/python3.3/site-packages/pudb/debugger.py", line 1256, in call_with_ui
    return f(_args, *_kwargs)
  File "/usr/lib64/python3.3/site-packages/pudb/debugger.py", line 1386, in interaction
    self.event_loop()
  File "/usr/lib64/python3.3/site-packages/pudb/debugger.py", line 1343, in event_loop
    toplevel.keypress(self.size, k)
  File "/usr/lib64/python3.3/site-packages/pudb/ui_tools.py", line 87, in keypress
    return handler(self, size, key)
  File "/usr/lib64/python3.3/site-packages/pudb/debugger.py", line 996, in show_traceback
    "".join(format_exception(*self.current_exc_tuple)))]),
  File "/usr/lib64/python3.3/traceback.py", line 181, in format_exception
    for value, tb in values:
  File "/usr/lib64/python3.3/traceback.py", line 122, in _iter_chain
    context = exc.__context__
AttributeError: 'str' object has no attribute '**context**'

"""

[asmeurer]

That's actually not a typo. That's how you have to do it for Python 2.4 and 2.5 support. But it doesn't work in Python 3. I don't know if there's a way around it.

[asmeurer]

See http://docs.python.org/3/howto/pyporting.html#capturing-the-currently-raised-exception.

[inducer]

The real issue is that I thought the installation script for pudb contained an invocation of 2to3, which should've made this issue disappear, but it did not. Fixed in 4f913f6. Please reopen if there's still an issue.

[asmeurer]

That's because you decided to use a single code base. If you switch to 2to3, there is a lot of code that can be simplified. I think you can probably delete the py3compat file completely.

[asmeurer]

See #1.

[inducer]

Wow. Goes to show how little I remember of the cr*p I said years ago. :) Re-fixed by 4059aeb.