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- # Copyright 2006 Google, Inc. All Rights Reserved.
- # Licensed to PSF under a Contributor Agreement.
- """Fixer for exec.
- This converts usages of the exec statement into calls to a built-in
- exec() function.
- exec code in ns1, ns2 -> exec(code, ns1, ns2)
- """
- # Local imports
- from .. import fixer_base
- from ..fixer_util import Comma, Name, Call
- class FixExec(fixer_base.BaseFix):
- BM_compatible = True
- PATTERN = """
- exec_stmt< 'exec' a=any 'in' b=any [',' c=any] >
- |
- exec_stmt< 'exec' (not atom<'(' [any] ')'>) a=any >
- """
- def transform(self, node, results):
- assert results
- syms = self.syms
- a = results["a"]
- b = results.get("b")
- c = results.get("c")
- args = [a.clone()]
- args[0].prefix = ""
- if b is not None:
- args.extend([Comma(), b.clone()])
- if c is not None:
- args.extend([Comma(), c.clone()])
- return Call(Name("exec"), args, prefix=node.prefix)
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