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- u"""Fixer for 'raise E(V).with_traceback(T)' -> 'raise E, V, T'"""
- 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):
- 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)
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