diff options
Diffstat (limited to 'lib/python2.7/lib2to3/fixes/fix_operator.py')
-rw-r--r-- | lib/python2.7/lib2to3/fixes/fix_operator.py | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/lib/python2.7/lib2to3/fixes/fix_operator.py b/lib/python2.7/lib2to3/fixes/fix_operator.py new file mode 100644 index 0000000..7bf2c0d --- /dev/null +++ b/lib/python2.7/lib2to3/fixes/fix_operator.py @@ -0,0 +1,96 @@ +"""Fixer for operator functions. + +operator.isCallable(obj) -> hasattr(obj, '__call__') +operator.sequenceIncludes(obj) -> operator.contains(obj) +operator.isSequenceType(obj) -> isinstance(obj, collections.Sequence) +operator.isMappingType(obj) -> isinstance(obj, collections.Mapping) +operator.isNumberType(obj) -> isinstance(obj, numbers.Number) +operator.repeat(obj, n) -> operator.mul(obj, n) +operator.irepeat(obj, n) -> operator.imul(obj, n) +""" + +# Local imports +from lib2to3 import fixer_base +from lib2to3.fixer_util import Call, Name, String, touch_import + + +def invocation(s): + def dec(f): + f.invocation = s + return f + return dec + + +class FixOperator(fixer_base.BaseFix): + BM_compatible = True + order = "pre" + + methods = """ + method=('isCallable'|'sequenceIncludes' + |'isSequenceType'|'isMappingType'|'isNumberType' + |'repeat'|'irepeat') + """ + obj = "'(' obj=any ')'" + PATTERN = """ + power< module='operator' + trailer< '.' %(methods)s > trailer< %(obj)s > > + | + power< %(methods)s trailer< %(obj)s > > + """ % dict(methods=methods, obj=obj) + + def transform(self, node, results): + method = self._check_method(node, results) + if method is not None: + return method(node, results) + + @invocation("operator.contains(%s)") + def _sequenceIncludes(self, node, results): + return self._handle_rename(node, results, u"contains") + + @invocation("hasattr(%s, '__call__')") + def _isCallable(self, node, results): + obj = results["obj"] + args = [obj.clone(), String(u", "), String(u"'__call__'")] + return Call(Name(u"hasattr"), args, prefix=node.prefix) + + @invocation("operator.mul(%s)") + def _repeat(self, node, results): + return self._handle_rename(node, results, u"mul") + + @invocation("operator.imul(%s)") + def _irepeat(self, node, results): + return self._handle_rename(node, results, u"imul") + + @invocation("isinstance(%s, collections.Sequence)") + def _isSequenceType(self, node, results): + return self._handle_type2abc(node, results, u"collections", u"Sequence") + + @invocation("isinstance(%s, collections.Mapping)") + def _isMappingType(self, node, results): + return self._handle_type2abc(node, results, u"collections", u"Mapping") + + @invocation("isinstance(%s, numbers.Number)") + def _isNumberType(self, node, results): + return self._handle_type2abc(node, results, u"numbers", u"Number") + + def _handle_rename(self, node, results, name): + method = results["method"][0] + method.value = name + method.changed() + + def _handle_type2abc(self, node, results, module, abc): + touch_import(None, module, node) + obj = results["obj"] + args = [obj.clone(), String(u", " + u".".join([module, abc]))] + return Call(Name(u"isinstance"), args, prefix=node.prefix) + + def _check_method(self, node, results): + method = getattr(self, "_" + results["method"][0].value.encode("ascii")) + if callable(method): + if "module" in results: + return method + else: + sub = (unicode(results["obj"]),) + invocation_str = unicode(method.invocation) % sub + self.warning(node, u"You should use '%s' here." % invocation_str) + return None |