cpython/Lib/lib2to3/fixes/fix_intern.py
Zsolt Dollenstein 96b06aefe2 bpo-33348: parse expressions after * and ** in lib2to3 (GH-6586)
These are valid even in python 2.7


https://bugs.python.org/issue33348



Automerge-Triggered-By: @gpshead
2019-10-23 23:19:07 -07:00

39 lines
1.1 KiB
Python

# Copyright 2006 Georg Brandl.
# Licensed to PSF under a Contributor Agreement.
"""Fixer for intern().
intern(s) -> sys.intern(s)"""
# Local imports
from .. import fixer_base
from ..fixer_util import ImportAndCall, touch_import
class FixIntern(fixer_base.BaseFix):
BM_compatible = True
order = "pre"
PATTERN = """
power< 'intern'
trailer< lpar='('
( not(arglist | argument<any '=' any>) obj=any
| obj=arglist<(not argument<any '=' any>) any ','> )
rpar=')' >
after=any*
>
"""
def transform(self, node, results):
if results:
# I feel like we should be able to express this logic in the
# PATTERN above but I don't know how to do it so...
obj = results['obj']
if obj:
if (obj.type == self.syms.argument and
obj.children[0].value in {'**', '*'}):
return # Make no change.
names = ('sys', 'intern')
new = ImportAndCall(node, results, names)
touch_import(None, 'sys', node)
return new