| | """Fixer for operator functions. |
| | |
| | operator.isCallable(obj) -> callable(obj) |
| | operator.sequenceIncludes(obj) -> operator.contains(obj) |
| | operator.isSequenceType(obj) -> isinstance(obj, collections.abc.Sequence) |
| | operator.isMappingType(obj) -> isinstance(obj, collections.abc.Mapping) |
| | operator.isNumberType(obj) -> isinstance(obj, numbers.Number) |
| | operator.repeat(obj, n) -> operator.mul(obj, n) |
| | operator.irepeat(obj, n) -> operator.imul(obj, n) |
| | """ |
| |
|
| | import collections.abc |
| |
|
| | |
| | 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, "contains") |
| |
|
| | @invocation("callable(%s)") |
| | def _isCallable(self, node, results): |
| | obj = results["obj"] |
| | return Call(Name("callable"), [obj.clone()], prefix=node.prefix) |
| |
|
| | @invocation("operator.mul(%s)") |
| | def _repeat(self, node, results): |
| | return self._handle_rename(node, results, "mul") |
| |
|
| | @invocation("operator.imul(%s)") |
| | def _irepeat(self, node, results): |
| | return self._handle_rename(node, results, "imul") |
| |
|
| | @invocation("isinstance(%s, collections.abc.Sequence)") |
| | def _isSequenceType(self, node, results): |
| | return self._handle_type2abc(node, results, "collections.abc", "Sequence") |
| |
|
| | @invocation("isinstance(%s, collections.abc.Mapping)") |
| | def _isMappingType(self, node, results): |
| | return self._handle_type2abc(node, results, "collections.abc", "Mapping") |
| |
|
| | @invocation("isinstance(%s, numbers.Number)") |
| | def _isNumberType(self, node, results): |
| | return self._handle_type2abc(node, results, "numbers", "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(", " + ".".join([module, abc]))] |
| | return Call(Name("isinstance"), args, prefix=node.prefix) |
| |
|
| | def _check_method(self, node, results): |
| | method = getattr(self, "_" + results["method"][0].value) |
| | if isinstance(method, collections.abc.Callable): |
| | if "module" in results: |
| | return method |
| | else: |
| | sub = (str(results["obj"]),) |
| | invocation_str = method.invocation % sub |
| | self.warning(node, "You should use '%s' here." % invocation_str) |
| | return None |
| |
|
