New submission from Michael Newman <michael.b.new...@gmail.com>:
In the second example given in "27.8.1. Traceback Examples" at:
http://docs.python.org/3.1/library/traceback.html
http://docs.python.org/py3k/library/traceback.html
which has the lumberjack:
The last line won't work in Python 3.1 and 3.2:
print("*** tb_lineno:", traceback.tb_lineno(exceptionTraceback))
because "tb_lineno" is no longer an attribute in the "traceback" module.
# Python 2.6 works fine (because Python2 retains the "tb_lineno" attribute in
the "traceback" module):
# Python 2.6.4 (r264:75706, Dec 7 2009, 18:45:15) [GCC 4.4.1] on linux2
*** print_tb:
File "print_traceback_and_exception.py", line 18, in <module>
lumberjack()
...
*** format_tb:
[' File "print_traceback_and_exception.py", line 18, in <module>\n
lumberjack()\n', ' File "print_traceback_and_exception.py", line 12, in
lumberjack\n bright_side_of_death()\n', ' File
"print_traceback_and_exception.py", line 15, in bright_side_of_death\n
return tuple()[0]\n']
('*** tb_lineno:', 18)
# Broken example using Python 3.1:
# Python 3.1.1 (r311:74480, Feb 7 2010, 16:32:28) [GCC 4.4.1] on linux2
m...@ebx2009:/media/Cruzer/notes/Programming/python3/lib/traceback$ python3.1
print_traceback_and_exception.py
*** print_tb:
File "print_traceback_and_exception.py", line 18, in <module>
lumberjack()
...
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "print_traceback_and_exception.py", line 38, in <module>
print("*** tb_lineno:", traceback.tb_lineno(exceptionTraceback))
AttributeError: 'module' object has no attribute 'tb_lineno'
# Broken example using Python 3.2:
# Python 3.2a0 (py3k:78294, Feb 21 2010, 16:37:29) [GCC 4.4.1] on linux2
m...@ebx2009:/media/Cruzer/notes/Programming/python3/lib/traceback$ python3.2
print_traceback_and_exception.py
*** print_tb:
File "print_traceback_and_exception.py", line 18, in <module>
lumberjack()
...
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "print_traceback_and_exception.py", line 38, in <module>
print("*** tb_lineno:", traceback.tb_lineno(exceptionTraceback))
AttributeError: 'module' object has no attribute 'tb_lineno'
This can be corrected by changing the last line of the example from:
print("*** tb_lineno:", traceback.tb_lineno(exceptionTraceback))
to:
print("*** tb_lineno:", exceptionTraceback.tb_lineno)
# Using my "rev1" example:
# Python 3.1 now sees the brighter side of life:
m...@ebx2009:/media/Cruzer/notes/Programming/python3/lib/traceback$ python3.1
print_traceback_and_exception_rev1.py
*** print_tb:
File "print_traceback_and_exception_rev1.py", line 19, in <module>
lumberjack()
...
*** format_tb:
[' File "print_traceback_and_exception_rev1.py", line 19, in <module>\n
lumberjack()\n', ' File "print_traceback_and_exception_rev1.py", line 13, in
lumberjack\n bright_side_of_death()\n', ' File
"print_traceback_and_exception_rev1.py", line 16, in bright_side_of_death\n
return tuple()[0]\n']
*** tb_lineno: 19
For reference:
"print_traceback_and_exception_rev1.py" = example corrected with Python3. The
original line has been commented out in case you want to turn it back on and
see the error yourself.
----------
assignee: georg.brandl
components: Documentation
files: print_traceback_and_exception_rev1.py
messages: 100033
nosy: georg.brandl, mnewman
severity: normal
status: open
title: traceback tb_lineno example needs correction for Python3
versions: Python 3.1, Python 3.2
Added file:
http://bugs.python.org/file16357/print_traceback_and_exception_rev1.py
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<http://bugs.python.org/issue8011>
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