[New-bugs-announce] [issue10416] UnicodeDecodeError when 2to3 is run on a dir with numpy .npy files

Zbyszek Szmek report at bugs.python.org
Sun Nov 14 12:34:05 CET 2010

New submission from Zbyszek Szmek <zbyszek at in.waw.pl>:

1. 2to3 should work only only files ending with '.py', but it takes
   anything which has a dot and ends with 'py'. I'm having trouble
   with numpy .npy files.
2. 2to3 tries to decode the file and fails with traceback that is not useful:
   the name of the failing file is not given.

A patch is attached.

% ls *.npy|head -n1

% 2to3-3.2 /usr/local/bin/2to3-3.2 .
RefactoringTool: Skipping implicit fixer: buffer
RefactoringTool: Skipping implicit fixer: idioms
RefactoringTool: Skipping implicit fixer: set_literal
RefactoringTool: Skipping implicit fixer: ws_comma
Traceback (most recent call last):
  File "/usr/local/bin/2to3-3.2", line 6, in <module>
  File "/usr/local/lib/python3.2/lib2to3/main.py", line 172, in main
  File "/usr/local/lib/python3.2/lib2to3/refactor.py", line 699, in refactor
    items, write, doctests_only)
  File "/usr/local/lib/python3.2/lib2to3/refactor.py", line 294, in refactor
    self.refactor_dir(dir_or_file, write, doctests_only)
  File "/usr/local/lib/python3.2/lib2to3/refactor.py", line 313, in refactor_dir
    self.refactor_file(fullname, write, doctests_only)
  File "/usr/local/lib/python3.2/lib2to3/refactor.py", line 740, in refactor_file
    *args, **kwargs)
  File "/usr/local/lib/python3.2/lib2to3/refactor.py", line 335, in refactor_file
    input, encoding = self._read_python_source(filename)
  File "/usr/local/lib/python3.2/lib2to3/refactor.py", line 331, in _read_python_source
    return _from_system_newlines(f.read()), encoding
  File "/usr/local/lib/python3.2/codecs.py", line 300, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf8' codec can't decode byte 0x93 in position 0: invalid start byte

components: 2to3 (2.x to 3.0 conversion tool)
files: diff.diff
keywords: patch
messages: 121188
nosy: zbysz
priority: normal
severity: normal
status: open
title: UnicodeDecodeError when 2to3 is run on a dir with numpy .npy files
type: crash
versions: Python 3.2
Added file: http://bugs.python.org/file19605/diff.diff

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