diff options
Diffstat (limited to 'Lib/lib2to3/fixes/fix_operator.py')
-rw-r--r-- | Lib/lib2to3/fixes/fix_operator.py | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/Lib/lib2to3/fixes/fix_operator.py b/Lib/lib2to3/fixes/fix_operator.py new file mode 100644 index 0000000..9b1089c --- /dev/null +++ b/Lib/lib2to3/fixes/fix_operator.py @@ -0,0 +1,40 @@ +"""Fixer for operator.{isCallable,sequenceIncludes} + +operator.isCallable(obj) -> hasattr(obj, '__call__') +operator.sequenceIncludes(obj) -> operator.contains(obj) +""" + +# Local imports +from .. import fixer_base +from ..fixer_util import Call, Name, String + +class FixOperator(fixer_base.BaseFix): + + methods = "method=('isCallable'|'sequenceIncludes')" + func = "'(' func=any ')'" + PATTERN = """ + power< module='operator' + trailer< '.' {methods} > trailer< {func} > > + | + power< {methods} trailer< {func} > > + """.format(methods=methods, func=func) + + def transform(self, node, results): + method = results["method"][0] + + if method.value == "sequenceIncludes": + if "module" not in results: + # operator may not be in scope, so we can't make a change. + self.warning(node, "You should use operator.contains here.") + else: + method.value = "contains" + method.changed() + elif method.value == "isCallable": + if "module" not in results: + self.warning(node, + "You should use hasattr(%s, '__call__') here." % + results["func"].value) + else: + func = results["func"] + args = [func.clone(), String(", "), String("'__call__'")] + return Call(Name("hasattr"), args, prefix=node.prefix) |