| """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 |