| 4710c53d |
1 | """Fixer for operator functions.\r |
| 2 | \r |
| 3 | operator.isCallable(obj) -> hasattr(obj, '__call__')\r |
| 4 | operator.sequenceIncludes(obj) -> operator.contains(obj)\r |
| 5 | operator.isSequenceType(obj) -> isinstance(obj, collections.Sequence)\r |
| 6 | operator.isMappingType(obj) -> isinstance(obj, collections.Mapping)\r |
| 7 | operator.isNumberType(obj) -> isinstance(obj, numbers.Number)\r |
| 8 | operator.repeat(obj, n) -> operator.mul(obj, n)\r |
| 9 | operator.irepeat(obj, n) -> operator.imul(obj, n)\r |
| 10 | """\r |
| 11 | \r |
| 12 | # Local imports\r |
| 13 | from lib2to3 import fixer_base\r |
| 14 | from lib2to3.fixer_util import Call, Name, String, touch_import\r |
| 15 | \r |
| 16 | \r |
| 17 | def invocation(s):\r |
| 18 | def dec(f):\r |
| 19 | f.invocation = s\r |
| 20 | return f\r |
| 21 | return dec\r |
| 22 | \r |
| 23 | \r |
| 24 | class FixOperator(fixer_base.BaseFix):\r |
| 25 | BM_compatible = True\r |
| 26 | order = "pre"\r |
| 27 | \r |
| 28 | methods = """\r |
| 29 | method=('isCallable'|'sequenceIncludes'\r |
| 30 | |'isSequenceType'|'isMappingType'|'isNumberType'\r |
| 31 | |'repeat'|'irepeat')\r |
| 32 | """\r |
| 33 | obj = "'(' obj=any ')'"\r |
| 34 | PATTERN = """\r |
| 35 | power< module='operator'\r |
| 36 | trailer< '.' %(methods)s > trailer< %(obj)s > >\r |
| 37 | |\r |
| 38 | power< %(methods)s trailer< %(obj)s > >\r |
| 39 | """ % dict(methods=methods, obj=obj)\r |
| 40 | \r |
| 41 | def transform(self, node, results):\r |
| 42 | method = self._check_method(node, results)\r |
| 43 | if method is not None:\r |
| 44 | return method(node, results)\r |
| 45 | \r |
| 46 | @invocation("operator.contains(%s)")\r |
| 47 | def _sequenceIncludes(self, node, results):\r |
| 48 | return self._handle_rename(node, results, u"contains")\r |
| 49 | \r |
| 50 | @invocation("hasattr(%s, '__call__')")\r |
| 51 | def _isCallable(self, node, results):\r |
| 52 | obj = results["obj"]\r |
| 53 | args = [obj.clone(), String(u", "), String(u"'__call__'")]\r |
| 54 | return Call(Name(u"hasattr"), args, prefix=node.prefix)\r |
| 55 | \r |
| 56 | @invocation("operator.mul(%s)")\r |
| 57 | def _repeat(self, node, results):\r |
| 58 | return self._handle_rename(node, results, u"mul")\r |
| 59 | \r |
| 60 | @invocation("operator.imul(%s)")\r |
| 61 | def _irepeat(self, node, results):\r |
| 62 | return self._handle_rename(node, results, u"imul")\r |
| 63 | \r |
| 64 | @invocation("isinstance(%s, collections.Sequence)")\r |
| 65 | def _isSequenceType(self, node, results):\r |
| 66 | return self._handle_type2abc(node, results, u"collections", u"Sequence")\r |
| 67 | \r |
| 68 | @invocation("isinstance(%s, collections.Mapping)")\r |
| 69 | def _isMappingType(self, node, results):\r |
| 70 | return self._handle_type2abc(node, results, u"collections", u"Mapping")\r |
| 71 | \r |
| 72 | @invocation("isinstance(%s, numbers.Number)")\r |
| 73 | def _isNumberType(self, node, results):\r |
| 74 | return self._handle_type2abc(node, results, u"numbers", u"Number")\r |
| 75 | \r |
| 76 | def _handle_rename(self, node, results, name):\r |
| 77 | method = results["method"][0]\r |
| 78 | method.value = name\r |
| 79 | method.changed()\r |
| 80 | \r |
| 81 | def _handle_type2abc(self, node, results, module, abc):\r |
| 82 | touch_import(None, module, node)\r |
| 83 | obj = results["obj"]\r |
| 84 | args = [obj.clone(), String(u", " + u".".join([module, abc]))]\r |
| 85 | return Call(Name(u"isinstance"), args, prefix=node.prefix)\r |
| 86 | \r |
| 87 | def _check_method(self, node, results):\r |
| 88 | method = getattr(self, "_" + results["method"][0].value.encode("ascii"))\r |
| 89 | if callable(method):\r |
| 90 | if "module" in results:\r |
| 91 | return method\r |
| 92 | else:\r |
| 93 | sub = (unicode(results["obj"]),)\r |
| 94 | invocation_str = unicode(method.invocation) % sub\r |
| 95 | self.warning(node, u"You should use '%s' here." % invocation_str)\r |
| 96 | return None\r |
projects / mirror_edk2.git / blame