cpython/Lib/lib2to3/fixes/fix_sys_exc.py
Benjamin Peterson 6d54b0178b Merged revisions 80934 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

................
  r80934 | benjamin.peterson | 2010-05-07 13:58:23 -0500 (Fri, 07 May 2010) | 69 lines

  Merged revisions 79911,79916-79917,80018,80418,80572-80573,80635-80639,80668,80922 via svnmerge from
  svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3

  ........
    r79911 | benjamin.peterson | 2010-04-09 15:38:53 -0500 (Fri, 09 Apr 2010) | 1 line

    use absolute import
  ........
    r79916 | benjamin.peterson | 2010-04-09 16:05:21 -0500 (Fri, 09 Apr 2010) | 1 line

    generalize detection of __future__ imports and attach them to the tree
  ........
    r79917 | benjamin.peterson | 2010-04-09 16:11:44 -0500 (Fri, 09 Apr 2010) | 1 line

    don't try to 'fix' relative imports when absolute_import is enabled #8858
  ........
    r80018 | benjamin.peterson | 2010-04-12 16:12:12 -0500 (Mon, 12 Apr 2010) | 4 lines

    prevent diffs from being mangled is multiprocess mode #6409

    Patch by George Boutsioukis.
  ........
    r80418 | benjamin.peterson | 2010-04-23 16:00:03 -0500 (Fri, 23 Apr 2010) | 1 line

    remove unhelpful description
  ........
    r80572 | benjamin.peterson | 2010-04-27 20:33:54 -0500 (Tue, 27 Apr 2010) | 1 line

    use unicode literals
  ........
    r80573 | jeffrey.yasskin | 2010-04-27 23:08:27 -0500 (Tue, 27 Apr 2010) | 6 lines

    Don't transform imports that are already relative.  2to3 turned
      from . import refactor
    into
      from .. import refactor
    which broke the transformation of 2to3 itself.
  ........
    r80635 | benjamin.peterson | 2010-04-29 16:02:23 -0500 (Thu, 29 Apr 2010) | 1 line

    remove imports
  ........
    r80636 | benjamin.peterson | 2010-04-29 16:02:41 -0500 (Thu, 29 Apr 2010) | 1 line

    unicode literal
  ........
    r80637 | benjamin.peterson | 2010-04-29 16:03:42 -0500 (Thu, 29 Apr 2010) | 1 line

    must pass a string to Number
  ........
    r80638 | benjamin.peterson | 2010-04-29 16:05:34 -0500 (Thu, 29 Apr 2010) | 1 line

    unicode literals
  ........
    r80639 | benjamin.peterson | 2010-04-29 16:06:09 -0500 (Thu, 29 Apr 2010) | 1 line

    pass string to Number
  ........
    r80668 | jeffrey.yasskin | 2010-04-30 18:02:47 -0500 (Fri, 30 Apr 2010) | 4 lines

    Make 2to3 run under Python 2.5 so that the benchmark suite at
    http://hg.python.org/benchmarks/ can use it and still run on implementations
    that haven't gotten to 2.6 yet.  Fixes issue 8566.
  ........
    r80922 | benjamin.peterson | 2010-05-07 11:06:25 -0500 (Fri, 07 May 2010) | 1 line

    prevent xrange transformation from wrapping range calls it produces in list
  ........
................
2010-05-07 19:06:32 +00:00

29 lines
1,023 B
Python

"""Fixer for sys.exc_{type, value, traceback}
sys.exc_type -> sys.exc_info()[0]
sys.exc_value -> sys.exc_info()[1]
sys.exc_traceback -> sys.exc_info()[2]
"""
# By Jeff Balogh and Benjamin Peterson
# Local imports
from .. import fixer_base
from ..fixer_util import Attr, Call, Name, Number, Subscript, Node, syms
class FixSysExc(fixer_base.BaseFix):
# This order matches the ordering of sys.exc_info().
exc_info = [u"exc_type", u"exc_value", u"exc_traceback"]
PATTERN = """
power< 'sys' trailer< dot='.' attribute=(%s) > >
""" % '|'.join("'%s'" % e for e in exc_info)
def transform(self, node, results):
sys_attr = results["attribute"][0]
index = Number(unicode(self.exc_info.index(sys_attr.value)))
call = Call(Name(u"exc_info"), prefix=sys_attr.prefix)
attr = Attr(Name(u"sys"), call)
attr[1].children[0].prefix = results["dot"].prefix
attr.append(Subscript(index))
return Node(syms.power, attr, prefix=node.prefix)