Traceback (most recent call last):


 "/Users/yuichi/Programs/online-judge-tools/main.py", line 151, in <module>

main()


 "/Users/yuichi/Programs/online-judge-tools/main.py", line 140, in main

download(args)


 "/Users/yuichi/Programs/online-judge-tools/main.py", line 34, in download

samples = problem.download(session=sess, **kwargs)


 "/Users/yuichi/Programs/online-judge-tools/onlinejudge/yukicoder.py", line 91, in download

return self.download_samples(session=session)


 "/Users/yuichi/Programs/online-judge-tools/onlinejudge/yukicoder.py", line 105, in download_samples

it = self._parse_sample_tag(pre)


 "/Users/yuichi/Programs/online-judge-tools/onlinejudge/yukicoder.py", line 138, in _parse_sample_tag

return utils.textfile(tag.string.lstrip()), pprv.string + ' ' + prv.string
AttributeError: 'NoneType' object has no attribute 'lstrip'

Traceback (most recent call last):


 "/local/starfish/venv-starfish-3.6.7/bin/pylint", line 11, in <module>

sys.exit(run_pylint())


 "/local/starfish/venv-starfish-3.6.7/lib/python3.6/site-packages/pylint/__init__.py", line 20, in run_pylint

Run(sys.argv[1:])


 "/local/starfish/venv-starfish-3.6.7/lib/python3.6/site-packages/pylint/lint.py", line 1629, in __init__

linter.check(args)


 "/local/starfish/venv-starfish-3.6.7/lib/python3.6/site-packages/pylint/lint.py", line 943, in check

self._do_check(files_or_modules)


 "/local/starfish/venv-starfish-3.6.7/lib/python3.6/site-packages/pylint/lint.py", line 1076, in _do_check

self.check_astroid_module(ast_node, walker, rawcheckers, tokencheckers)


 "/local/starfish/venv-starfish-3.6.7/lib/python3.6/site-packages/pylint/lint.py", line 1159, in check_astroid_module

walker.walk(ast_node)


 "/local/starfish/venv-starfish-3.6.7/lib/python3.6/site-packages/pylint/utils.py", line 1303, in walk

self.walk(child)


 "/local/starfish/venv-starfish-3.6.7/lib/python3.6/site-packages/pylint/utils.py", line 1303, in walk

self.walk(child)


 "/local/starfish/venv-starfish-3.6.7/lib/python3.6/site-packages/pylint/utils.py", line 1303, in walk

self.walk(child)

[Previous line repeated 2 more times]


 "/local/starfish/venv-starfish-3.6.7/lib/python3.6/site-packages/pylint/utils.py", line 1300, in walk

cb(astroid)


 "/local/starfish/venv-starfish-3.6.7/lib/python3.6/site-packages/pylint/checkers/strings.py", line 357, in visit_call

self._check_new_format(node, func)


 "/local/starfish/venv-starfish-3.6.7/lib/python3.6/site-packages/pylint/checkers/strings.py", line 451, in _check_new_format

self._check_new_format_specifiers(node, fields, named_arguments)


 "/local/starfish/venv-starfish-3.6.7/lib/python3.6/site-packages/pylint/checkers/strings.py", line 497, in _check_new_format_specifiers

previous = previous.getattr(specifier)[0]


 "/local/starfish/venv-starfish-3.6.7/lib/python3.6/site-packages/astroid/bases.py", line 186, in getattr

return [self.special_attributes.lookup(name)]


 "/local/starfish/venv-starfish-3.6.7/lib/python3.6/site-packages/astroid/interpreter/objectmodel.py", line 115, in lookup

return getattr(self, IMPL_PREFIX + name)


 "/local/starfish/venv-starfish-3.6.7/lib/python3.6/site-packages/astroid/interpreter/objectmodel.py", line 586, in attr___class__

return self._instance._proxied
AttributeError: 'NoneType' object has no attribute '_proxied'
