1 # Copyright 2006 Google, Inc. All Rights Reserved. 2 # Licensed to PSF under a Contributor Agreement. 3 4 """Fixer for apply(). 5 6 This converts apply(func, v, k) into (func)(*v, **k).""" 7 8 # Local imports 9 from .. import pytree 10 from ..pgen2 import token 11 from .. import fixer_base 12 from ..fixer_util import Call, Comma, parenthesize 13 14 class FixApply(fixer_base.BaseFix): 15 BM_compatible = True 16 17 PATTERN = """ 18 power< 'apply' 19 trailer< 20 '(' 21 arglist< 22 (not argument<NAME '=' any>) func=any ',' 23 (not argument<NAME '=' any>) args=any [',' 24 (not argument<NAME '=' any>) kwds=any] [','] 25 > 26 ')' 27 > 28 > 29 """ 30 31 def transform(self, node, results): 32 syms = self.syms 33 assert results 34 func = results["func"] 35 args = results["args"] 36 kwds = results.get("kwds") 37 prefix = node.prefix 38 func = func.clone() 39 if (func.type not in (token.NAME, syms.atom) and 40 (func.type != syms.power or 41 func.children[-2].type == token.DOUBLESTAR)): 42 # Need to parenthesize 43 func = parenthesize(func) 44 func.prefix = "" 45 args = args.clone() 46 args.prefix = "" 47 if kwds is not None: 48 kwds = kwds.clone() 49 kwds.prefix = "" 50 l_newargs = [pytree.Leaf(token.STAR, u"*"), args] 51 if kwds is not None: 52 l_newargs.extend([Comma(), 53 pytree.Leaf(token.DOUBLESTAR, u"**"), 54 kwds]) 55 l_newargs[-2].prefix = u" " # that's the ** token 56 # XXX Sometimes we could be cleverer, e.g. apply(f, (x, y) + t) 57 # can be translated into f(x, y, *t) instead of f(*(x, y) + t) 58 #new = pytree.Node(syms.power, (func, ArgList(l_newargs))) 59 return Call(func, l_newargs, prefix=prefix) 60
