u"""Fixer for raise E(V).with_traceback(T) to: from future.utils import raise_ ... raise_(E, V, T) TODO: FIXME!! """ from lib2to3 import fixer_base from lib2to3.fixer_util import Comma, Node, Leaf, token, syms class FixRaise(fixer_base.BaseFix): PATTERN = u""" raise_stmt< 'raise' (power< name=any [trailer< '(' val=any* ')' >] [trailer< '.' 'with_traceback' > trailer< '(' trc=any ')' >] > | any) ['from' chain=any] >""" def transform(self, node, results): FIXME name, val, trc = (results.get(u"name"), results.get(u"val"), results.get(u"trc")) chain = results.get(u"chain") if chain is not None: self.warning(node, u"explicit exception chaining is not supported in Python 2") chain.prev_sibling.remove() chain.remove() if trc is not None: val = val[0] if val else Leaf(token.NAME, u"None") val.prefix = trc.prefix = u" " kids = [Leaf(token.NAME, u"raise"), name.clone(), Comma(), val.clone(), Comma(), trc.clone()] raise_stmt = Node(syms.raise_stmt, kids) node.replace(raise_stmt)