New submission from Jason R. Coombs:
I'm writing a routine that captures exceptions and logs them to a database. In
doing so, I encountered a situation that when parsing a Unicode file that has
an IndentationError (SyntaxError), print_exc will fail when it tries to render
the unicode line. Here's a script that replicates the failure.
# coding: utf-8
from __future__ import unicode_literals
import io
import sys
import traceback
PY3 = sys.version_info > (3,)
print(sys.version)
buffer = io.StringIO() if PY3 else io.BytesIO()
try:
args = str('<tokenize>'), 7, 2, ' // test'
raise IndentationError('failed', args)
except Exception:
traceback.print_exc(file=buffer)
And the output
$ python2 test-unicode-tb.py
2.7.13 (default, Dec 24 2016, 21:20:02)
[GCC 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.42.1)]
Traceback (most recent call last):
File "test-unicode-tb.py", line 19, in <module>
traceback.print_exc(file=buffer)
File
"/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/traceback.py",
line 233, in print_exc
print_exception(etype, value, tb, limit, file)
File
"/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/traceback.py",
line 128, in print_exception
_print(file, line, '')
File
"/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/traceback.py",
line 13, in _print
file.write(str+terminator)
TypeError: 'unicode' does not have the buffer interface
The same test runs without error on Python 3. It's surprising to me that I'm
the first person to encounter this issue. Is it possible I'm abusing the
tokenize module and a unicode value shouldn't be present in the args for the
IndentationError?
----------
messages: 289592
nosy: jason.coombs
priority: normal
severity: normal
status: open
title: TypeError in traceback.print_exc - unicode does not have the buffer
interface
versions: Python 2.7
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Python tracker <[email protected]>
<http://bugs.python.org/issue29809>
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