Use zero-argument super() where applicable

This replaces 2-argument super(...) calls with zero-argument
super() calls, where doing so preserves the exact semantics. This
turns out to be everywhere in the actual code (now all uses of the
super builtin are calls to it with zero arguments), and also in
most places code was discussed in comments.

The single exception, occurring in comments (technically a string
literal, but being used as a comment), appears in
git.objects.util.TraversableIterableObj, where super(Commit, self),
rather than super(TraversableIterableObj, self) which would have
the same meaning as super(), is shown. It may be that this should
be changed, but such a revision would not signify identical
semantics, and may require other changes to preserve or recover
clarity or documentary accuracy.

Author: EliahKagan

Diff for: git/cmd.py

@@ -718,7 +718,7 @@ def __init__(self, working_dir: Union[None, PathLike] = None):
            It is meant to be the working tree directory if available, or the
            ``.git`` directory in case of bare repositories.
         """
-        super(Git, self).__init__()
+        super().__init__()
         self._working_dir = expand_path(working_dir)
         self._git_options: Union[List[str], Tuple[str, ...]] = ()
         self._persistent_git_options: List[str] = []
@@ -765,7 +765,7 @@ def _set_cache_(self, attr: str) -> None:
                 tuple(int(n) for n in version_numbers.split(".")[:4] if n.isdigit()),
             )
         else:
-            super(Git, self)._set_cache_(attr)
+            super()._set_cache_(attr)
         # END handle version info
 
     @property

Diff for: git/config.py

@@ -107,7 +107,7 @@ def __new__(cls, name: str, bases: Tuple, clsdict: Dict[str, Any]) -> "MetaParse
             # END for each base
         # END if mutating methods configuration is set
 
-        new_type = super(MetaParserBuilder, cls).__new__(cls, name, bases, clsdict)
+        new_type = super().__new__(cls, name, bases, clsdict)
         return new_type
 
 
@@ -178,7 +178,7 @@ def __del__(self) -> None:
     def __getattr__(self, attr: str) -> Any:
         if attr in self._valid_attrs_:
             return lambda *args, **kwargs: self._call_config(attr, *args, **kwargs)
-        return super(SectionConstraint, self).__getattribute__(attr)
+        return super().__getattribute__(attr)
 
     def _call_config(self, method: str, *args: Any, **kwargs: Any) -> Any:
         """Call the configuration at the given method which must take a section name
@@ -207,36 +207,36 @@ class _OMD(OrderedDict_OMD):
     """Ordered multi-dict."""
 
     def __setitem__(self, key: str, value: _T) -> None:
-        super(_OMD, self).__setitem__(key, [value])
+        super().__setitem__(key, [value])
 
     def add(self, key: str, value: Any) -> None:
         if key not in self:
-            super(_OMD, self).__setitem__(key, [value])
+            super().__setitem__(key, [value])
             return None
-        super(_OMD, self).__getitem__(key).append(value)
+        super().__getitem__(key).append(value)
 
     def setall(self, key: str, values: List[_T]) -> None:
-        super(_OMD, self).__setitem__(key, values)
+        super().__setitem__(key, values)
 
     def __getitem__(self, key: str) -> Any:
-        return super(_OMD, self).__getitem__(key)[-1]
+        return super().__getitem__(key)[-1]
 
     def getlast(self, key: str) -> Any:
-        return super(_OMD, self).__getitem__(key)[-1]
+        return super().__getitem__(key)[-1]
 
     def setlast(self, key: str, value: Any) -> None:
         if key not in self:
-            super(_OMD, self).__setitem__(key, [value])
+            super().__setitem__(key, [value])
             return
 
-        prior = super(_OMD, self).__getitem__(key)
+        prior = super().__getitem__(key)
         prior[-1] = value
 
     def get(self, key: str, default: Union[_T, None] = None) -> Union[_T, None]:
-        return super(_OMD, self).get(key, [default])[-1]
+        return super().get(key, [default])[-1]
 
     def getall(self, key: str) -> List[_T]:
-        return super(_OMD, self).__getitem__(key)
+        return super().__getitem__(key)
 
     def items(self) -> List[Tuple[str, _T]]:  # type: ignore[override]
         """List of (key, last value for key)."""
@@ -680,7 +680,7 @@ def write_section(name: str, section_dict: _OMD) -> None:
 
     def items(self, section_name: str) -> List[Tuple[str, str]]:  # type: ignore[override]
         """:return: list((option, value), ...) pairs of all items in the given section"""
-        return [(k, v) for k, v in super(GitConfigParser, self).items(section_name) if k != "__name__"]
+        return [(k, v) for k, v in super().items(section_name) if k != "__name__"]
 
     def items_all(self, section_name: str) -> List[Tuple[str, List[str]]]:
         """:return: list((option, [values...]), ...) pairs of all items in the given section"""
@@ -748,7 +748,7 @@ def _assure_writable(self, method_name: str) -> None:
 
     def add_section(self, section: str) -> None:
         """Assures added options will stay in order"""
-        return super(GitConfigParser, self).add_section(section)
+        return super().add_section(section)
 
     @property
     def read_only(self) -> bool:
@@ -899,7 +899,7 @@ def rename_section(self, section: str, new_name: str) -> "GitConfigParser":
         if self.has_section(new_name):
             raise ValueError("Destination section '%s' already exists" % new_name)
 
-        super(GitConfigParser, self).add_section(new_name)
+        super().add_section(new_name)
         new_section = self._sections[new_name]
         for k, vs in self.items_all(section):
             new_section.setall(k, vs)

Diff for: git/db.py

@@ -34,7 +34,7 @@ class GitCmdObjectDB(LooseObjectDB):
 
     def __init__(self, root_path: PathLike, git: "Git") -> None:
         """Initialize this instance with the root and a git command."""
-        super(GitCmdObjectDB, self).__init__(root_path)
+        super().__init__(root_path)
         self._git = git
 
     def info(self, binsha: bytes) -> OInfo:

Diff for: git/exc.py

@@ -137,7 +137,7 @@ class GitCommandNotFound(CommandError):
     the GIT_PYTHON_GIT_EXECUTABLE environment variable."""
 
     def __init__(self, command: Union[List[str], Tuple[str], str], cause: Union[str, Exception]) -> None:
-        super(GitCommandNotFound, self).__init__(command, cause)
+        super().__init__(command, cause)
         self._msg = "Cmd('%s') not found%s"
 
 
@@ -151,7 +151,7 @@ def __init__(
         stderr: Union[bytes, str, None] = None,
         stdout: Union[bytes, str, None] = None,
     ) -> None:
-        super(GitCommandError, self).__init__(command, status, stderr, stdout)
+        super().__init__(command, status, stderr, stdout)
 
 
 class CheckoutError(GitError):
@@ -207,7 +207,7 @@ def __init__(
         stderr: Union[bytes, str, None] = None,
         stdout: Union[bytes, str, None] = None,
     ) -> None:
-        super(HookExecutionError, self).__init__(command, status, stderr, stdout)
+        super().__init__(command, status, stderr, stdout)
         self._msg = "Hook('%s') failed%s"
 
 

Diff for: git/index/base.py

@@ -153,7 +153,7 @@ def _set_cache_(self, attr: str) -> None:
 
             self._deserialize(stream)
         else:
-            super(IndexFile, self)._set_cache_(attr)
+            super()._set_cache_(attr)
 
     def _index_path(self) -> PathLike:
         if self.repo.git_dir:
@@ -1425,4 +1425,4 @@ def diff(
             raise ValueError("other must be None, Diffable.Index, a Tree or Commit, was %r" % other)
 
         # Diff against working copy - can be handled by superclass natively.
-        return super(IndexFile, self).diff(other, paths, create_patch, **kwargs)
+        return super().diff(other, paths, create_patch, **kwargs)

Diff for: git/objects/base.py

@@ -62,7 +62,7 @@ def __init__(self, repo: "Repo", binsha: bytes):
 
         :param binsha: 20 byte SHA1
         """
-        super(Object, self).__init__()
+        super().__init__()
         self.repo = repo
         self.binsha = binsha
         assert len(binsha) == 20, "Require 20 byte binary sha, got %r, len = %i" % (
@@ -108,7 +108,7 @@ def _set_cache_(self, attr: str) -> None:
             self.size = oinfo.size  # type:  int
             # assert oinfo.type == self.type, _assertion_msg_format % (self.binsha, oinfo.type, self.type)
         else:
-            super(Object, self)._set_cache_(attr)
+            super()._set_cache_(attr)
 
     def __eq__(self, other: Any) -> bool:
         """:return: True if the objects have the same SHA1"""
@@ -190,7 +190,7 @@ def __init__(
             Path may not be set if the index object has been created directly, as it
             cannot be retrieved without knowing the parent tree.
         """
-        super(IndexObject, self).__init__(repo, binsha)
+        super().__init__(repo, binsha)
         if mode is not None:
             self.mode = mode
         if path is not None:
@@ -212,7 +212,7 @@ def _set_cache_(self, attr: str) -> None:
                 % (attr, type(self).__name__)
             )
         else:
-            super(IndexObject, self)._set_cache_(attr)
+            super()._set_cache_(attr)
         # END handle slot attribute
 
     @property

Diff for: git/objects/commit.py

@@ -146,7 +146,7 @@ def __init__(
             as what time.altzone returns. The sign is inverted compared to git's
             UTC timezone.
         """
-        super(Commit, self).__init__(repo, binsha)
+        super().__init__(repo, binsha)
         self.binsha = binsha
         if tree is not None:
             assert isinstance(tree, Tree), "Tree needs to be a Tree instance, was %s" % type(tree)
@@ -218,7 +218,7 @@ def _set_cache_(self, attr: str) -> None:
             _binsha, _typename, self.size, stream = self.repo.odb.stream(self.binsha)
             self._deserialize(BytesIO(stream.read()))
         else:
-            super(Commit, self)._set_cache_(attr)
+            super()._set_cache_(attr)
         # END handle attrs
 
     @property

Diff for: git/objects/submodule/base.py

@@ -124,7 +124,7 @@ def __init__(
         :param branch_path: Full (relative) path to ref to checkout when cloning the
             remote repository.
         """
-        super(Submodule, self).__init__(repo, binsha, mode, path)
+        super().__init__(repo, binsha, mode, path)
         self.size = 0
         self._parent_commit = parent_commit
         if url is not None:
@@ -154,7 +154,7 @@ def _set_cache_(self, attr: str) -> None:
         elif attr == "_name":
             raise AttributeError("Cannot retrieve the name of a submodule if it was not set initially")
         else:
-            super(Submodule, self)._set_cache_(attr)
+            super()._set_cache_(attr)
         # END handle attribute name
 
     @classmethod
@@ -174,7 +174,7 @@ def __eq__(self, other: Any) -> bool:
         """Compare with another submodule."""
         # We may only compare by name as this should be the ID they are hashed with.
         # Otherwise this type wouldn't be hashable.
-        # return self.path == other.path and self.url == other.url and super(Submodule, self).__eq__(other)
+        # return self.path == other.path and self.url == other.url and super().__eq__(other)
         return self._name == other._name
 
     def __ne__(self, other: object) -> bool:

Diff for: git/objects/submodule/root.py

@@ -55,7 +55,7 @@ class RootModule(Submodule):
 
     def __init__(self, repo: "Repo"):
         # repo, binsha, mode=None, path=None, name = None, parent_commit=None, url=None, ref=None)
-        super(RootModule, self).__init__(
+        super().__init__(
             repo,
             binsha=self.NULL_BIN_SHA,
             mode=self.k_default_mode,

Diff for: git/objects/submodule/util.py

@@ -79,7 +79,7 @@ def __init__(self, *args: Any, **kwargs: Any) -> None:
         self._smref: Union["ReferenceType[Submodule]", None] = None
         self._index = None
         self._auto_write = True
-        super(SubmoduleConfigParser, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
     # { Interface
     def set_submodule(self, submodule: "Submodule") -> None:
@@ -107,7 +107,7 @@ def flush_to_index(self) -> None:
 
     # { Overridden Methods
     def write(self) -> None:  # type: ignore[override]
-        rval: None = super(SubmoduleConfigParser, self).write()
+        rval: None = super().write()
         self.flush_to_index()
         return rval
 

Diff for: git/objects/tag.py

@@ -64,7 +64,7 @@ def __init__(
             The timezone that the authored_date is in, in a format similar
             to :attr:`time.altzone`.
         """
-        super(TagObject, self).__init__(repo, binsha)
+        super().__init__(repo, binsha)
         if object is not None:
             self.object: Union["Commit", "Blob", "Tree", "TagObject"] = object
         if tag is not None:
@@ -108,4 +108,4 @@ def _set_cache_(self, attr: str) -> None:
                 self.message = ""
         # END check our attributes
         else:
-            super(TagObject, self)._set_cache_(attr)
+            super()._set_cache_(attr)

Diff for: git/objects/tree.py

@@ -237,7 +237,7 @@ def __init__(
         mode: int = tree_id << 12,
         path: Union[PathLike, None] = None,
     ):
-        super(Tree, self).__init__(repo, binsha, mode, path)
+        super().__init__(repo, binsha, mode, path)
 
     @classmethod
     def _get_intermediate_items(
@@ -254,7 +254,7 @@ def _set_cache_(self, attr: str) -> None:
             ostream = self.repo.odb.stream(self.binsha)
             self._cache: List[TreeCacheTup] = tree_entries_from_data(ostream.read())
         else:
-            super(Tree, self)._set_cache_(attr)
+            super()._set_cache_(attr)
         # END handle attribute
 
     def _iter_convert_to_object(self, iterable: Iterable[TreeCacheTup]) -> Iterator[IndexObjUnion]:
@@ -352,13 +352,13 @@ def traverse(
         # def is_tree_traversed(inp: Tuple) -> TypeGuard[Tuple[Iterator[Union['Tree', 'Blob', 'Submodule']]]]:
         #     return all(isinstance(x, (Blob, Tree, Submodule)) for x in inp[1])
 
-        # ret = super(Tree, self).traverse(predicate, prune, depth, branch_first, visit_once, ignore_self)
+        # ret = super().traverse(predicate, prune, depth, branch_first, visit_once, ignore_self)
         # ret_tup = itertools.tee(ret, 2)
         # assert is_tree_traversed(ret_tup), f"Type is {[type(x) for x in list(ret_tup[0])]}"
         # return ret_tup[0]"""
         return cast(
             Union[Iterator[IndexObjUnion], Iterator[TraversedTreeTup]],
-            super(Tree, self)._traverse(
+            super()._traverse(
                 predicate,
                 prune,
                 depth,  # type: ignore
@@ -374,7 +374,7 @@ def list_traverse(self, *args: Any, **kwargs: Any) -> IterableList[IndexObjUnion
             traverse()
             Tree -> IterableList[Union['Submodule', 'Tree', 'Blob']]
         """
-        return super(Tree, self)._list_traverse(*args, **kwargs)
+        return super()._list_traverse(*args, **kwargs)
 
     # List protocol
 

Diff for: git/objects/util.py

@@ -577,7 +577,7 @@ class TraversableIterableObj(IterableObj, Traversable):
     TIobj_tuple = Tuple[Union[T_TIobj, None], T_TIobj]
 
     def list_traverse(self: T_TIobj, *args: Any, **kwargs: Any) -> IterableList[T_TIobj]:
-        return super(TraversableIterableObj, self)._list_traverse(*args, **kwargs)
+        return super()._list_traverse(*args, **kwargs)
 
     @overload  # type: ignore
     def traverse(self: T_TIobj) -> Iterator[T_TIobj]:
@@ -652,7 +652,5 @@ def is_commit_traversed(inp: Tuple) -> TypeGuard[Tuple[Iterator[Tuple['Commit',
         """
         return cast(
             Union[Iterator[T_TIobj], Iterator[Tuple[Union[None, T_TIobj], T_TIobj]]],
-            super(TraversableIterableObj, self)._traverse(
-                predicate, prune, depth, branch_first, visit_once, ignore_self, as_edge  # type: ignore
-            ),
+            super()._traverse(predicate, prune, depth, branch_first, visit_once, ignore_self, as_edge),  # type: ignore
         )

Diff for: git/refs/head.py

@@ -39,7 +39,7 @@ class HEAD(SymbolicReference):
     def __init__(self, repo: "Repo", path: PathLike = _HEAD_NAME):
         if path != self._HEAD_NAME:
             raise ValueError("HEAD instance must point to %r, got %r" % (self._HEAD_NAME, path))
-        super(HEAD, self).__init__(repo, path)
+        super().__init__(repo, path)
         self.commit: "Commit"
 
     def orig_head(self) -> SymbolicReference:

Diff for: git/refs/log.py

@@ -155,7 +155,7 @@ class RefLog(List[RefLogEntry], Serializable):
     __slots__ = ("_path",)
 
     def __new__(cls, filepath: Union[PathLike, None] = None) -> "RefLog":
-        inst = super(RefLog, cls).__new__(cls)
+        inst = super().__new__(cls)
         return inst
 
     def __init__(self, filepath: Union[PathLike, None] = None):

Diff for: git/refs/reference.py

@@ -62,7 +62,7 @@ def __init__(self, repo: "Repo", path: PathLike, check_path: bool = True) -> Non
         if check_path and not str(path).startswith(self._common_path_default + "/"):
             raise ValueError(f"Cannot instantiate {self.__class__.__name__!r} from path {path}")
         self.path: str  # SymbolicReference converts to string at the moment.
-        super(Reference, self).__init__(repo, path)
+        super().__init__(repo, path)
 
     def __str__(self) -> str:
         return self.name
@@ -87,7 +87,7 @@ def set_object(
             # END handle commit retrieval
         # END handle message is set
 
-        super(Reference, self).set_object(object, logmsg)
+        super().set_object(object, logmsg)
 
         if oldbinsha is not None:
             # From refs/files-backend.c in git-source:

Diff for: git/refs/remote.py

@@ -40,7 +40,7 @@ def iter_items(
             common_path = join_path(common_path, str(remote))
         # END handle remote constraint
         # super is Reference
-        return super(RemoteReference, cls).iter_items(repo, common_path)
+        return super().iter_items(repo, common_path)
 
     # The Head implementation of delete also accepts strs, but this
     # implementation does not.  mypy doesn't have a way of representing