pylint 1.3.1 (and astroid) fails: AttributeError: 'Name' object has no attribute 'expr'

[jquast]

another case where pylint 1.4 resolves the issue, just like #73, #75, #76. Just putting it here for issue tracking to help other folk who find the issue.

$ cat z/xyz.py << EOF
from __future__ import print_function

msg_rest = u'{0}'.format

print(msg_rest(1))
EOF
$ touch z/__init__.py
$ prospector -X z
  File "/Users/jquast/.virtualenvs/x84/bin/prospector", line 9, in <module>
    load_entry_point('prospector==0.7.4', 'console_scripts', 'prospector')()
  File "/Users/jquast/.virtualenvs/x84/lib/python2.7/site-packages/prospector/run.py", line 320, in main
    prospector.execute()
  File "/Users/jquast/.virtualenvs/x84/lib/python2.7/site-packages/prospector/run.py", line 227, in execute
    messages += tool.run()
  File "/Users/jquast/.virtualenvs/x84/lib/python2.7/site-packages/prospector/tools/pylint/__init__.py", line 182, in run
    self._linter.check(self._args)
  File "/Users/jquast/.virtualenvs/x84/lib/python2.7/site-packages/pylint/lint.py", line 585, in check
    self.check_astroid_module(astroid, walker, rawcheckers, tokencheckers)
  File "/Users/jquast/.virtualenvs/x84/lib/python2.7/site-packages/pylint/lint.py", line 662, in check_astroid_module
    walker.walk(astroid)
  File "/Users/jquast/.virtualenvs/x84/lib/python2.7/site-packages/pylint/utils.py", line 804, in walk
    self.walk(child)
  File "/Users/jquast/.virtualenvs/x84/lib/python2.7/site-packages/pylint/utils.py", line 804, in walk
    self.walk(child)
  File "/Users/jquast/.virtualenvs/x84/lib/python2.7/site-packages/pylint/utils.py", line 804, in walk
    self.walk(child)
  File "/Users/jquast/.virtualenvs/x84/lib/python2.7/site-packages/pylint/utils.py", line 801, in walk
    cb(astroid)
  File "/Users/jquast/.virtualenvs/x84/lib/python2.7/site-packages/pylint/checkers/strings.py", line 339, in visit_callfunc
    self._check_new_format(node, func)
  File "/Users/jquast/.virtualenvs/x84/lib/python2.7/site-packages/pylint/checkers/strings.py", line 348, in _check_new_format
    if not isinstance(node.func.expr, astroid.Const):
AttributeError: 'Name' object has no attribute 'expr'

[carlio]

The 0.8 release which just appeared will fix this, see #73 (comment)