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