Karthikeyan Singaravelan <tir.kar...@gmail.com> added the comment:
Thanks for the patch. Would you like to make a GitHub PR. I think it's a
problem with optparse in general while trying to have a default value with
unicode character and %default in the help string. The same code is present in
Python 3 but strings are unicode by default. An example code will be below :
# -*- coding: utf-8 -*-
from optparse import OptionParser
parser = OptionParser()
parser.add_option("-f", "--file", dest="filename",
help="write to FILE. Default value %default", metavar="FILE",
default="早上好")
(options, args) = parser.parse_args()
$ python3.6 ../backups/bpo24307.py --help
Usage: bpo24307.py [options]
Options:
-h, --help show this help message and exit
-f FILE, --file=FILE write to FILE. Default value 早上好
$ python2.7 ../backups/bpo24307.py --help
Traceback (most recent call last):
File "../backups/bpo24307.py", line 9, in <module>
(options, args) = parser.parse_args()
File
"/usr/local/Cellar/python@2/2.7.14_3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/optparse.py",
line 1400, in parse_args
stop = self._process_args(largs, rargs, values)
File
"/usr/local/Cellar/python@2/2.7.14_3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/optparse.py",
line 1440, in _process_args
self._process_long_opt(rargs, values)
File
"/usr/local/Cellar/python@2/2.7.14_3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/optparse.py",
line 1515, in _process_long_opt
option.process(opt, value, values, self)
File
"/usr/local/Cellar/python@2/2.7.14_3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/optparse.py",
line 789, in process
self.action, self.dest, opt, value, values, parser)
File
"/usr/local/Cellar/python@2/2.7.14_3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/optparse.py",
line 811, in take_action
parser.print_help()
File
"/usr/local/Cellar/python@2/2.7.14_3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/optparse.py",
line 1670, in print_help
file.write(self.format_help().encode(encoding, "replace"))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe6 in position 148:
ordinal not in range(128)
Thanks
----------
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue24307>
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