From b4f2963a15657d24b5d336d5aac4198320198219 Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 09:58:30 +0000
Subject: [PATCH 01/22] Removed walrus operators

---
 src/saveable_objects/_saveable_object.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/saveable_objects/_saveable_object.py b/src/saveable_objects/_saveable_object.py
index 42cd140..7c5dd63 100644
--- a/src/saveable_objects/_saveable_object.py
+++ b/src/saveable_objects/_saveable_object.py
@@ -89,7 +89,8 @@ def _save(self, path: str, write_mode: Literal["w", "wb", "a", "ab", "x", "xb"]
             as `mode` for ``open``. By default ``"wb"``.
         """
         if not os.path.exists(path):
-            if (dirname := os.path.dirname(path)) != '':
+            dirname = os.path.dirname(path)
+            if dirname != '':
                 os.makedirs(dirname, exist_ok=True)
         with open(path, write_mode) as file:
             cpkl.dump(self, file, pkl.HIGHEST_PROTOCOL)
@@ -343,7 +344,8 @@ def loadif(cls, *args, **kwargs) -> Tuple["SaveableObject", bool]:
             path = bound_args.arguments["path"]
         except KeyError:
             path = None
-        if instance := cls.tryload(path):
+        instance = cls.tryload(path)
+        if instance:
             return instance, True
         return cls(*args, **kwargs), False
     @classmethod

From 63c36d6a7389e14a60b55daa58b14ddb2880db2b Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 09:59:22 +0000
Subject: [PATCH 02/22] Simplified imports

---
 src/saveable_objects/checkpointing/_checkpointing.py  | 2 +-
 src/saveable_objects/checkpointing/_checkpointing.pyi | 2 +-
 src/saveable_objects/extensions/_extensions.py        | 2 +-
 src/saveable_objects/extensions/_extensions.pyi       | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/saveable_objects/checkpointing/_checkpointing.py b/src/saveable_objects/checkpointing/_checkpointing.py
index d11a8c1..8e0c1e0 100644
--- a/src/saveable_objects/checkpointing/_checkpointing.py
+++ b/src/saveable_objects/checkpointing/_checkpointing.py
@@ -1,6 +1,6 @@
 from typing import Tuple
 
-from .._saveable_object import SaveableObject
+from .. import SaveableObject
 
 def failed(load_attempt: SaveableObject | bool | Tuple[SaveableObject, bool]) -> bool:
     """Determines if a :class:`SaveableObject <saveable_objects.SaveableObject>`
diff --git a/src/saveable_objects/checkpointing/_checkpointing.pyi b/src/saveable_objects/checkpointing/_checkpointing.pyi
index 6a5e30b..b745907 100644
--- a/src/saveable_objects/checkpointing/_checkpointing.pyi
+++ b/src/saveable_objects/checkpointing/_checkpointing.pyi
@@ -1,6 +1,6 @@
 from typing import Tuple
 
-from .._saveable_object import SaveableObject
+from .. import SaveableObject
 
 def failed(load_attempt: SaveableObject | bool | Tuple[SaveableObject, bool]) -> bool:
     """Determines if a ``SaveableObject`` ``.load()``, ``.tryload()``,
diff --git a/src/saveable_objects/extensions/_extensions.py b/src/saveable_objects/extensions/_extensions.py
index eb8292d..d59a497 100644
--- a/src/saveable_objects/extensions/_extensions.py
+++ b/src/saveable_objects/extensions/_extensions.py
@@ -1,6 +1,6 @@
 from typing import Optional, TypeVar, Generic
 
-from .._saveable_object import SaveableObject
+from .. import SaveableObject
 from .._meta_class import SaveAfterInitMetaClass
 
 T = TypeVar("T")
diff --git a/src/saveable_objects/extensions/_extensions.pyi b/src/saveable_objects/extensions/_extensions.pyi
index f3b5e77..0a58f35 100644
--- a/src/saveable_objects/extensions/_extensions.pyi
+++ b/src/saveable_objects/extensions/_extensions.pyi
@@ -1,6 +1,6 @@
 from typing import TypeVar, Generic
 
-from .._saveable_object import SaveableObject
+from .. import SaveableObject
 from .._meta_class import SaveAfterInitMetaClass
 
 T = TypeVar("T")

From 88e0c28de6a7945f91b2e97b9554c0a566b3e53a Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 09:59:47 +0000
Subject: [PATCH 03/22] Removed unsupported typing

---
 src/saveable_objects/_saveable_object_3_7.py  | 407 ++++++++++++++++++
 .../checkpointing/_checkpointing_3_7.py       |  73 ++++
 2 files changed, 480 insertions(+)
 create mode 100644 src/saveable_objects/_saveable_object_3_7.py
 create mode 100644 src/saveable_objects/checkpointing/_checkpointing_3_7.py

diff --git a/src/saveable_objects/_saveable_object_3_7.py b/src/saveable_objects/_saveable_object_3_7.py
new file mode 100644
index 0000000..283e2b5
--- /dev/null
+++ b/src/saveable_objects/_saveable_object_3_7.py
@@ -0,0 +1,407 @@
+import os
+import inspect
+import numpy as np
+import pickle as pkl
+import cloudpickle as cpkl
+from typing import Optional, Union, IO, Tuple
+
+from ._meta_class import SaveAfterInitMetaClass
+
+class SaveableObject(metaclass=SaveAfterInitMetaClass):
+    """A utility class for saving objects to pickles and checkpointing.
+    """
+    def __init__(self, path: Optional[str] = None):
+        """Initialises an instance of the :class:`SaveableObject`.
+        If a path is specified the saveable object is automatically saved after
+        initialisation.
+
+        Parameters
+        ----------
+        path : str, optional
+            The file :attr:`path` to save the object to. If ``None`` then the
+            object is not saved. By default ``None``.
+
+        Notes
+        -----
+        If no file extension is provided for `path` then the class name and the
+        ``.pkl`` extension are appended to the file name.
+        """
+        self.path = path
+    @property
+    def path(self) -> Optional[str]:
+        """The current file path of the object.
+
+        Notes
+        -----
+        On setting the value, if no file extension is provided then the class
+        name and the ``.pkl`` extension are appended to the file name.
+        """
+        return self._path
+    @path.setter
+    def path(self, value: Optional[str]):
+        """Set the current file path of the object.
+
+        Parameters
+        ----------
+        value : str, optional
+            The new file path of the object. By default ``None``.
+
+        Notes
+        -----
+        If no file extension is provided then the class name and the ``.pkl``
+        extension are appended to the file name.
+        """
+        self._path = self._updatepathroot(value)
+    @classmethod
+    def _get_name(cls, path: Optional[str]) -> Optional[str]:
+        """Returns the file name of the specified path (without the file
+        extension).
+
+        Parameters
+        ----------
+        path : str, optional
+            The path to obtain the file name for.
+
+        Returns
+        -------
+        str, optional
+            The file name (without the file extension).
+        """
+        if path is None:
+            return None
+        return os.path.split(os.path.splitext(cls._updatepathroot(path))[0])[-1]
+    @property
+    def name(self) -> Optional[str]:
+        """The file name of the object (without the file extension). Note that
+        `name` is read only.
+        """
+        return self._get_name(self._path)
+        
+    def _save(self, path: str, write_mode = "wb"):
+        """Saves the object to `path` using `write_mode`.
+
+        Parameters
+        ----------
+        path : str
+            The path to save the object to.
+        write_mode : Literal["w", "wb", "a", "ab", "x", "xb"], optional
+            The mode with which to open the file to write to. These are the same
+            as `mode` for ``open``. By default ``"wb"``.
+        """
+        if not os.path.exists(path):
+            dirname = os.path.dirname(path)
+            if dirname != '':
+                os.makedirs(dirname, exist_ok=True)
+        with open(path, write_mode) as file:
+            cpkl.dump(self, file, pkl.HIGHEST_PROTOCOL)
+    def _getpath(self, path: Optional[str]) -> str:
+        """Returns the specified or saved :attr:`path`.
+
+        Parameters
+        ----------
+        path : str, optional
+            Specified path.
+
+        Returns
+        -------
+        str
+            Returns the specified or saved :attr:`path`.
+
+        Raises
+        ------
+        ValueError
+            No save path provided. Raised if no path is saved or specified.
+        """
+        path = path if path is not None or not hasattr(self, 'path') else self.path
+        if path is None:
+            raise ValueError("No save path provided.")
+        path = self._updatepathroot(path)
+        return path
+    @classmethod
+    def _updatepathroot(cls, path: Optional[str]) -> Optional[str]:
+        """If no file extension is provided then the class name and the ``.pkl``
+        extension are appended to the file name.
+
+        Parameters
+        ----------
+        path : str, optional
+            The file path.
+
+        Returns
+        -------
+        str, optional
+            The modified file path.
+        """
+        if path is None:
+            return None
+        split = os.path.splitext(path)
+        if len(split[1]) == 0:
+            file_name = os.path.split(split[0])[-1]
+            prefix = "_" if len(file_name) != 0 and file_name[-1] != "_" else ""
+            path += prefix + cls.__name__ + ".pkl"
+        return path
+    def save(self, path: Optional[str] = None):
+        """Pickles the current instance.
+
+        Parameters
+        ----------
+        path : str, optional
+            The path to pickle the instance to. If ``None`` is specified
+            then the attribute :attr:`path` is used instead.
+            By default ``None``.
+
+        Raises
+        ------
+        ValueError
+            Raised if no path specified either by the parameter `path` or the
+            attribute :attr:`path`.
+
+        Notes
+        -----
+        If no file extension is provided then the class name and the ``.pkl``
+        extension are appended to the file name.
+        """
+        self.path = self._getpath(path)
+        self._save(self.path)
+    def update_save(self, path: Optional[str] = None) -> bool:
+        """Pickles the current instance and retains the saved arguments if
+        they exist.
+
+        Parameters
+        ----------
+        path : str, optional
+            The path to pickle the instance to. If ``None`` is specified
+            then the attribute :attr:`path` is used instead. By default
+            ``None``.
+
+        Returns
+        -------
+        bool
+            ``True`` if there was an argument pickle to retain. ``False`` if
+            there was not an argument pickle to retain.
+
+        Raises
+        ------
+        ValueError
+            Raised if no path specified.
+
+        Notes
+        -----
+        If no file extension is provided then the class name and the ``.pkl``
+        extension are appended to the file name.
+        """
+        self.path = self._getpath(path)
+        file = open(self.path, "rb")
+        # Throw away the prior save:
+        try:
+            type(self)._load(file)
+        except:
+            pass
+        # Retain the parameters:
+        try:
+            params = pkl.load(file)
+        except EOFError:
+            # Close the file before writing to it
+            file.close()
+            self._save(self.path)
+            return False
+        else:
+            # Close the file before writing to it
+            file.close()
+            self._save(self.path)
+            SaveableObject._save(params, self.path, write_mode="ab")
+            return True
+        
+    @classmethod
+    def _load(cls, file: IO, new_path: Optional[str] = None, strict_typing: bool = True) -> "SaveableObject":
+        """Loads an instance from the `file`.
+
+        Parameters
+        ----------
+        file : IO
+            The file to load the instance from.
+        new_path : str, optional
+            The path to replace the previous path with. If ``None`` the `path`
+            is not replaced. By default ``None``.
+        strict_typing : bool, optional
+            If ``True`` then the loaded instance must be an instance of `cls`.
+            By default ``True``.
+
+        Returns
+        -------
+        `cls`
+            The loaded instance.
+
+        Raises
+        ------
+        TypeError
+            If `strict_typing` and the loaded instance is not an instance of
+            `cls`.
+
+        Notes
+        -----
+        ``strict_typing=True`` acts as a safety guard. Setting
+        ``strict_typing=False`` may increase the probability of unexpected or
+        uncaught errors.
+        """
+        instance =  pkl.load(file)
+        if strict_typing and not isinstance(instance, cls):
+            raise TypeError(f"The loaded instance is not an instance of {cls}.")
+        if new_path is not None:
+            instance.path = new_path
+        return instance
+    @classmethod
+    def load(cls, path: str, new_path: Optional[str] = None, strict_typing: bool = True) -> "SaveableObject":
+        """Loads a pickled instance.
+
+        Parameters
+        ----------
+        path : str
+            The path of the pickle.
+        new_path : str, optional
+            The path to replace the previous path with. If ``None`` the `path`
+            is not replaced. By default ``None``.
+        strict_typing : bool, optional
+            If ``True`` then the loaded instance must be an instance of `cls`.
+            By default ``True``.
+
+        Returns
+        -------
+        SaveableObject
+            The loaded instance.
+
+        Raises
+        ------
+        TypeError
+            If `strict_typing` and the loaded instance is not an instance of
+            `cls`.
+
+        Notes
+        -----
+        ``strict_typing=True`` acts as a safety guard. Setting
+        ``strict_typing=False`` may increase the probability of unexpected or
+        uncaught errors.
+        """
+        path = cls._updatepathroot(path)
+        with open(path, "rb") as file:
+            return cls._load(file, new_path, strict_typing)
+    @classmethod
+    def tryload(cls, path: Optional[str], new_path: Optional[str] = None, strict_typing: bool = True) -> Union["SaveableObject", bool]:
+        """Attempts to :meth:`load` from the specified `path`. If the loading
+        fails then ``False`` is returned.
+
+        Parameters
+        ----------
+        path : str, optional
+            The path of the pickle. If ``None`` then ``False`` is returned.
+        new_path : str, optional
+            The path to replace the previous path with. If ``None`` the `path`
+            is not replaced. By default ``None``.
+        strict_typing : bool, optional
+            If ``True`` then the loaded instance must be an instance of `cls`.
+            By default ``True``.
+
+        Returns
+        -------
+        SaveableObject | Literal[False]
+            If succeeded the loaded instance, else False.
+
+        Notes
+        -----
+        ``strict_typing=True`` acts as a safety guard. Setting
+        ``strict_typing=False`` may increase the probability of unexpected or
+        uncaught errors.
+        """
+        try:
+            return cls.load(path, new_path, strict_typing)
+        except (FileNotFoundError, TypeError):
+            return False
+    @classmethod
+    def loadif(cls, *args, **kwargs) -> Tuple["SaveableObject", bool]:
+        """Attempts to load from a specified `path`. If the loading fails or no
+        `path` is specified then a new instance of the object is generated with
+        the specified `*args` and `**kwargs`.
+
+        Parameters
+        ----------
+        *args
+            The arguments to pass to the initialisation on a failed
+            :meth:`load`.
+        path : str, optional
+            The path of the pickle, by default the parameter is not specified.
+        **kwargs
+            The keyword arguments to pass to the initialisation on a failed
+            :meth:`load`.
+        
+        Returns
+        -------
+        (SaveableObject, bool)
+            The loaded or initialised instance followed by ``True`` if the
+            instance was loaded and ``False`` if the instance was initialised.
+        """
+        bound_args = inspect.signature(cls.__init__).bind(..., *args, **kwargs)
+        try:
+            path = bound_args.arguments["path"]
+        except KeyError:
+            path = None
+        instance = cls.tryload(path)
+        if instance:
+            return instance, True
+        return cls(*args, **kwargs), False
+    @classmethod
+    def loadifparams(cls, *args, dependencies: dict = {}, **kwargs) -> Tuple["SaveableObject", bool]:
+        """Attempts to :meth:`load` from a specified `path`. If the loading
+        fails or no `path` is specified or the parameters do not match the saved
+        parameters then a new instance of the object is generated with the
+        specified `*args` and `**kwargs`.
+
+        Parameters
+        ----------
+        *args
+            The arguments to pass to the initialisation on a failed
+            :meth:`load`.
+        path : str, optional
+            The path of the pickle, by default the parameter is not specified.
+        dependencies : dict, optional, must be specified as a keyword argument
+            A dictionary of additional dependencies to check.
+        **kwargs
+            The keyword arguments to pass to the initialisation on a failed
+            :meth:`load`.
+        
+        Returns
+        -------
+        (SaveableObject, bool)
+            The loaded or initialised instance followed by ``True`` if the
+            instance was loaded and ``False`` if the instance was initialised.
+        """
+        bound_args = inspect.signature(cls.__init__).bind(..., *args, **kwargs)
+        try:
+            path = bound_args.arguments["path"]
+        except KeyError:
+            path = None
+        path = cls._updatepathroot(path)
+        duplicates = []
+        for key in dependencies.keys():
+            if key in bound_args.arguments.keys():
+                duplicates.append(key)
+        if len(duplicates) != 0:
+            raise TypeError(f"The dependencies {duplicates} are also arguments. They must have different names.")
+        arguments = {**bound_args.arguments, **dependencies}
+        try:
+            with open(path, "rb") as file:
+                instance = cls._load(file)
+                params = pkl.load(file)
+            for key, value in arguments.items():
+                comparison = params[key] != value
+                if isinstance(comparison, bool):
+                    if comparison:
+                        raise ValueError
+                else:
+                    if not np.array_equal(params[key], value):
+                        raise ValueError
+            return instance, True
+        except (FileNotFoundError, EOFError, ValueError, TypeError, KeyError):
+            instance = cls(*args, **kwargs)
+            if path is not None:
+                SaveableObject._save(arguments, path, write_mode="ab")
+            return instance, False
\ No newline at end of file
diff --git a/src/saveable_objects/checkpointing/_checkpointing_3_7.py b/src/saveable_objects/checkpointing/_checkpointing_3_7.py
new file mode 100644
index 0000000..869563a
--- /dev/null
+++ b/src/saveable_objects/checkpointing/_checkpointing_3_7.py
@@ -0,0 +1,73 @@
+from typing import Tuple, Union
+
+from .. import SaveableObject
+
+def failed(load_attempt: Union[SaveableObject, bool, Tuple[SaveableObject, bool]]) -> bool:
+    """Determines if a :class:`SaveableObject <saveable_objects.SaveableObject>`
+    :meth:`.load() <saveable_objects.SaveableObject.load>`,
+    :meth:`.tryload() <saveable_objects.SaveableObject.tryload>`,
+    :meth:`.loadif() <saveable_objects.SaveableObject.loadif>`, or
+    :meth:`.loadifparams() <saveable_objects.SaveableObject.loadifparams>` attempt
+    fails.
+
+    Parameters
+    ----------
+    load_attempt : SaveableObject | bool | (SaveableObject, bool)
+        The output of :meth:`load() <saveable_objects.SaveableObject.load>`,
+        :meth:`tryload() <saveable_objects.SaveableObject.tryload>`,
+        :meth:`loadif() <saveable_objects.SaveableObject.loadif>`, or
+        :meth:`loadifparams() <saveable_objects.SaveableObject.loadifparams>`.
+
+    Returns
+    -------
+    bool
+        Returns ``True`` is the the `load_attempt` failed, else ``False``.
+
+    Notes
+    -----
+    Example use:
+
+    .. code-block:: python
+    
+        if failed(obj := SaveableObject.loadif(*args, path="filename.pkl", **kwargs)):
+            ... # code that generates obj
+        ... # code that uses obj
+    """
+    try:
+        return not load_attempt[1]
+    except:
+        return not load_attempt
+    
+def succeeded(load_attempt: Union[SaveableObject, bool, Tuple[SaveableObject, bool]]) -> bool:
+    """Determines if a :class:`SaveableObject <saveable_objects.SaveableObject>`
+    :meth:`.load() <saveable_objects.SaveableObject.load>`,
+    :meth:`.tryload() <saveable_objects.SaveableObject.tryload>`,
+    :meth:`.loadif() <saveable_objects.SaveableObject.loadif>`, or
+    :meth:`.loadifparams() <saveable_objects.SaveableObject.loadifparams>` attempt
+    succeeds.
+
+    Parameters
+    ----------
+    load_attempt : SaveableObject | bool | (SaveableObject, bool)
+        The output of :meth:`load() <saveable_objects.SaveableObject.load>`,
+        :meth:`tryload() <saveable_objects.SaveableObject.tryload>`,
+        :meth:`loadif() <saveable_objects.SaveableObject.loadif>`, or
+        :meth:`loadifparams() <saveable_objects.SaveableObject.loadifparams>`.
+
+    Returns
+    -------
+    bool
+        Returns ``True`` is the the `load_attempt` succeeded, else ``False``.
+
+    Notes
+    -----
+    Example use:
+
+    .. code-block:: python
+    
+        if succeeded(obj := SaveableObject.loadif(*args, path="filename.pkl", **kwargs)):
+            ... # code that uses a successfully loaded obj
+        else:
+            ... # code to run if obj failed to load
+    """
+    return not failed(load_attempt)
\ No newline at end of file

From a8258a28509e57370d2dfb092dbf5b3fc6ee8d91 Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 10:01:23 +0000
Subject: [PATCH 04/22] Added version specific imports

---
 src/saveable_objects/__init__.py               | 7 ++++++-
 src/saveable_objects/checkpointing/__init__.py | 7 ++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/saveable_objects/__init__.py b/src/saveable_objects/__init__.py
index 13d3296..bc26b1b 100644
--- a/src/saveable_objects/__init__.py
+++ b/src/saveable_objects/__init__.py
@@ -2,4 +2,9 @@
 A python package for checkpointing, saving, and loading objects.
 """
 
-from ._saveable_object import SaveableObject
\ No newline at end of file
+import sys
+
+if sys.version_info[1] >= 8: # check if python is version 3.8 or later
+    from ._saveable_object import SaveableObject
+else: # import from the python version 3.7 compatable file
+    from ._saveable_object_3_7 import SaveableObject
\ No newline at end of file
diff --git a/src/saveable_objects/checkpointing/__init__.py b/src/saveable_objects/checkpointing/__init__.py
index 968b14b..bbc0e4c 100644
--- a/src/saveable_objects/checkpointing/__init__.py
+++ b/src/saveable_objects/checkpointing/__init__.py
@@ -2,4 +2,9 @@
 A collection of functions for checkpointing objects.
 """
 
-from ._checkpointing import failed, succeeded
\ No newline at end of file
+import sys
+
+if sys.version_info[1] >= 8: # check if python is version 3.8 or later
+    from ._checkpointing import failed, succeeded
+else: # import from the python version 3.7 compatable file
+    from ._checkpointing_3_7 import failed, succeeded
\ No newline at end of file

From bd62bd1caf8c9ee2fbe8e28e826b7dff095ae707 Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 10:01:55 +0000
Subject: [PATCH 05/22] Reduced the version requirement to 3.7

---
 pyproject.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyproject.toml b/pyproject.toml
index dcba10a..8252356 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ maintainers = [
 description = "A python package for checkpointing, saving, and loading objects."
 keywords = ["save", "saving", "saveable", "object", "checkpoint", "checkpointing", "load", "loading"]
 readme = "README.md"
-requires-python = ">=3.10"
+requires-python = ">=3.7"
 classifiers = [
     "Programming Language :: Python :: 3",
     "Operating System :: OS Independent",

From 2cba8a398f10f646a4a1256ef5fe5369f31c0f3a Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 10:02:10 +0000
Subject: [PATCH 06/22] Updated titles in documentation

---
 docs/index.rst           | 4 ++--
 docs/reference/index.rst | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/docs/index.rst b/docs/index.rst
index 79c9e96..6c56f32 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -3,8 +3,8 @@
    You can adapt this file completely to your liking, but it should at least
    contain the root `toctree` directive.
 
-saveable-objects documentation
-==============================
+saveable-objects
+================
 
 .. include:: ../README.md
     :parser: myst_parser.sphinx_
diff --git a/docs/reference/index.rst b/docs/reference/index.rst
index 3c524c5..a876af1 100644
--- a/docs/reference/index.rst
+++ b/docs/reference/index.rst
@@ -1,5 +1,5 @@
 API Reference
-=============================
+=============
 
 .. autosummary::
     :toctree: _autosummary

From 47fcc9d03cbc8519bb72f03a8a164f71abce8d2b Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 10:03:15 +0000
Subject: [PATCH 07/22] Added requirements to the README

---
 README.md | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/README.md b/README.md
index f0d810e..3f1d54f 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,15 @@ The python package can be installed with pip as follows:
 pip install saveable-objects
 ```
 
+### Requirements:
+
+Python >= 3.7
+
+Packages:
+
+- [NumPy](https://numpy.org/)
+- [cloudpickle](https://github.com/cloudpipe/cloudpickle)
+
 ## Documentation
 
 Documentation including worked examples can be found at: [https://saveable-objects.readthedocs.io/](https://saveable-objects.readthedocs.io/).

From 439bdee610cfb2e9468e274e4a592d69536ac956 Mon Sep 17 00:00:00 2001
From: "Christopher K. Long"
 <92798672+Christopher-K-Long@users.noreply.github.com>
Date: Sat, 22 Mar 2025 10:09:16 +0000
Subject: [PATCH 08/22] Test package GitHub workflow now tests on python 3.7
 through to 3.13 inclusive.

---
 .github/workflows/test-python-package.yml | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/test-python-package.yml b/.github/workflows/test-python-package.yml
index a3864ae..a169f9c 100644
--- a/.github/workflows/test-python-package.yml
+++ b/.github/workflows/test-python-package.yml
@@ -21,13 +21,16 @@ jobs:
   build:
 
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v4
-    - name: Set up Python 3.10
-      uses: actions/setup-python@v3
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v5
       with:
-        python-version: "3.10"
+        python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip

From 9e6900981e81360650db6da7c26c17cd798476d3 Mon Sep 17 00:00:00 2001
From: "Christopher K. Long"
 <92798672+Christopher-K-Long@users.noreply.github.com>
Date: Sat, 22 Mar 2025 10:13:34 +0000
Subject: [PATCH 09/22] Update test-python-package.yml to use 3.7.1 as 3.7.0 is
 not supported by GitHub test

---
 .github/workflows/test-python-package.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/test-python-package.yml b/.github/workflows/test-python-package.yml
index a169f9c..bb5741b 100644
--- a/.github/workflows/test-python-package.yml
+++ b/.github/workflows/test-python-package.yml
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.7.1", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v4

From 497c5165d4e8ee775652904f7bff2e932e2099b8 Mon Sep 17 00:00:00 2001
From: "Christopher K. Long"
 <92798672+Christopher-K-Long@users.noreply.github.com>
Date: Sat, 22 Mar 2025 10:17:29 +0000
Subject: [PATCH 10/22] Changed version of Ubuntu for GitHub Tests as python
 3.7 has not been compiled on latest Ubuntu

---
 .github/workflows/test-python-package.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/test-python-package.yml b/.github/workflows/test-python-package.yml
index bb5741b..f5e1016 100644
--- a/.github/workflows/test-python-package.yml
+++ b/.github/workflows/test-python-package.yml
@@ -20,10 +20,10 @@ permissions:
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: ["3.7.1", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v4

From 680609c8a252688e7cace28b980f860c7b477378 Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 10:19:33 +0000
Subject: [PATCH 11/22] Corrected version specific imports

---
 src/saveable_objects/__init__.py               | 2 +-
 src/saveable_objects/checkpointing/__init__.py | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/saveable_objects/__init__.py b/src/saveable_objects/__init__.py
index bc26b1b..91dac11 100644
--- a/src/saveable_objects/__init__.py
+++ b/src/saveable_objects/__init__.py
@@ -4,7 +4,7 @@
 
 import sys
 
-if sys.version_info[1] >= 8: # check if python is version 3.8 or later
+if sys.version_info[1] >= 10: # check if python is version 3.8 or later
     from ._saveable_object import SaveableObject
 else: # import from the python version 3.7 compatable file
     from ._saveable_object_3_7 import SaveableObject
\ No newline at end of file
diff --git a/src/saveable_objects/checkpointing/__init__.py b/src/saveable_objects/checkpointing/__init__.py
index bbc0e4c..4bd144d 100644
--- a/src/saveable_objects/checkpointing/__init__.py
+++ b/src/saveable_objects/checkpointing/__init__.py
@@ -4,7 +4,7 @@
 
 import sys
 
-if sys.version_info[1] >= 8: # check if python is version 3.8 or later
+if sys.version_info[1] >= 10: # check if python is version 3.8 or later
     from ._checkpointing import failed, succeeded
 else: # import from the python version 3.7 compatable file
     from ._checkpointing_3_7 import failed, succeeded
\ No newline at end of file

From 7ca2ce6be8d0c378cac7b22ed9acb8cf6c7b7fb8 Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 10:24:05 +0000
Subject: [PATCH 12/22] Moved package building to latest python version

---
 .github/workflows/test-python-package.yml | 31 ++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/test-python-package.yml b/.github/workflows/test-python-package.yml
index f5e1016..2cf8736 100644
--- a/.github/workflows/test-python-package.yml
+++ b/.github/workflows/test-python-package.yml
@@ -19,7 +19,36 @@ permissions:
 
 jobs:
   build:
+    name: Build distribution
+    runs-on: ubuntu-latest
 
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        persist-credentials: false
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: "3.x"
+    - name: Install pypa/build
+      run: >-
+        python3 -m
+        pip install
+        build
+        --user
+    - name: Build a binary wheel and a source tarball
+      run: python3 -m build
+    - name: Store the distribution packages
+      uses: actions/upload-artifact@v4
+      with:
+        name: python-package-distributions
+        path: dist/
+
+  test:
+    name: >-
+      Testing distribution
+    needs:
+    - build
     runs-on: ubuntu-20.04
     strategy:
       matrix:
@@ -36,7 +65,7 @@ jobs:
         python -m pip install --upgrade pip
         pip install flake8 pytest
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
-        python -m pip install -e ./
+        python -m pip install -e ./dist/*.whl
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names

From 7e3b6748e4525387b646750338b21cc0d5439a16 Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 10:27:50 +0000
Subject: [PATCH 13/22] Updated .whl glob

---
 .github/workflows/test-python-package.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/test-python-package.yml b/.github/workflows/test-python-package.yml
index 2cf8736..d328391 100644
--- a/.github/workflows/test-python-package.yml
+++ b/.github/workflows/test-python-package.yml
@@ -65,7 +65,7 @@ jobs:
         python -m pip install --upgrade pip
         pip install flake8 pytest
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
-        python -m pip install -e ./dist/*.whl
+        for %%w in (./dist/*.whl) do  python -m pip install -e %%w
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names

From a7e6830448a306ce8dc89dbbaea32860f0079d98 Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 10:48:29 +0000
Subject: [PATCH 14/22] Bug fix in for loop

---
 .github/workflows/test-python-package.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/test-python-package.yml b/.github/workflows/test-python-package.yml
index d328391..470b09e 100644
--- a/.github/workflows/test-python-package.yml
+++ b/.github/workflows/test-python-package.yml
@@ -65,7 +65,7 @@ jobs:
         python -m pip install --upgrade pip
         pip install flake8 pytest
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
-        for %%w in (./dist/*.whl) do  python -m pip install -e %%w
+        for w in ./dist/*.whl; do python -m pip install $w; done
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names

From bd961de0d92acf69f35d864b67be8e1c0cfe7d6b Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 10:52:49 +0000
Subject: [PATCH 15/22] bug fix (downloading the builds before installing)

---
 .github/workflows/test-python-package.yml | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/test-python-package.yml b/.github/workflows/test-python-package.yml
index 470b09e..207b6a5 100644
--- a/.github/workflows/test-python-package.yml
+++ b/.github/workflows/test-python-package.yml
@@ -55,6 +55,11 @@ jobs:
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
+    - name: Download all the dists
+      uses: actions/download-artifact@v4
+      with:
+        name: python-package-distributions
+        path: dist/
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
@@ -65,7 +70,7 @@ jobs:
         python -m pip install --upgrade pip
         pip install flake8 pytest
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
-        for w in ./dist/*.whl; do python -m pip install $w; done
+        for w in dist/*.whl; do python -m pip install $w; done
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names

From 19dc44a450a19a78def5c3ab0d95ae7b4d1a1460 Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 10:55:33 +0000
Subject: [PATCH 16/22] tyring a different directory pre-fix

---
 .github/workflows/test-python-package.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/test-python-package.yml b/.github/workflows/test-python-package.yml
index 207b6a5..63b765f 100644
--- a/.github/workflows/test-python-package.yml
+++ b/.github/workflows/test-python-package.yml
@@ -70,7 +70,7 @@ jobs:
         python -m pip install --upgrade pip
         pip install flake8 pytest
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
-        for w in dist/*.whl; do python -m pip install $w; done
+        for w in ./dist/*.whl; do python -m pip install $w; done
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names

From 528bda55be4ab5d632a0737ff783f16318e04f0d Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 11:01:07 +0000
Subject: [PATCH 17/22] picking correct shell

---
 .github/workflows/test-python-package.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/test-python-package.yml b/.github/workflows/test-python-package.yml
index 63b765f..4984893 100644
--- a/.github/workflows/test-python-package.yml
+++ b/.github/workflows/test-python-package.yml
@@ -71,6 +71,7 @@ jobs:
         pip install flake8 pytest
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
         for w in ./dist/*.whl; do python -m pip install $w; done
+      shell: bash
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names

From d7e2d329b00f0f06b0cfc1a549b2e579ae8af8eb Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 11:05:25 +0000
Subject: [PATCH 18/22] without for loop

---
 .github/workflows/test-python-package.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/test-python-package.yml b/.github/workflows/test-python-package.yml
index 4984893..bbbbec0 100644
--- a/.github/workflows/test-python-package.yml
+++ b/.github/workflows/test-python-package.yml
@@ -70,8 +70,8 @@ jobs:
         python -m pip install --upgrade pip
         pip install flake8 pytest
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
-        for w in ./dist/*.whl; do python -m pip install $w; done
-      shell: bash
+        mv ./dist/*.whl ./dist/package.whl
+        python -m pip install ./dist/package.whl
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names

From 99f9d657caadc5ea3078de238251d91f80cb569e Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 11:08:07 +0000
Subject: [PATCH 19/22] printing files

---
 .github/workflows/test-python-package.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.github/workflows/test-python-package.yml b/.github/workflows/test-python-package.yml
index bbbbec0..7cd5c9b 100644
--- a/.github/workflows/test-python-package.yml
+++ b/.github/workflows/test-python-package.yml
@@ -70,6 +70,8 @@ jobs:
         python -m pip install --upgrade pip
         pip install flake8 pytest
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        ls
+        ls ./dist
         mv ./dist/*.whl ./dist/package.whl
         python -m pip install ./dist/package.whl
     - name: Lint with flake8

From f22d8c552d3041ea2bf1c97b832d1d272d0c6225 Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 11:17:50 +0000
Subject: [PATCH 20/22] bug fix

---
 .github/workflows/test-python-package.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/test-python-package.yml b/.github/workflows/test-python-package.yml
index 7cd5c9b..d00ffb2 100644
--- a/.github/workflows/test-python-package.yml
+++ b/.github/workflows/test-python-package.yml
@@ -55,12 +55,12 @@ jobs:
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
+    - uses: actions/checkout@v4
     - name: Download all the dists
       uses: actions/download-artifact@v4
       with:
         name: python-package-distributions
         path: dist/
-    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with:

From 83f5e453a4a124e885063026dfb88a65f58d672f Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 11:19:47 +0000
Subject: [PATCH 21/22] returning to for loop strucutre now the dists are
 actually being downloaded

---
 .github/workflows/test-python-package.yml | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/.github/workflows/test-python-package.yml b/.github/workflows/test-python-package.yml
index d00ffb2..3397627 100644
--- a/.github/workflows/test-python-package.yml
+++ b/.github/workflows/test-python-package.yml
@@ -70,10 +70,7 @@ jobs:
         python -m pip install --upgrade pip
         pip install flake8 pytest
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
-        ls
-        ls ./dist
-        mv ./dist/*.whl ./dist/package.whl
-        python -m pip install ./dist/package.whl
+        for w in ./dist/*.whl; do python -m pip install $w; done
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names

From 69a97ea8f47ea4ebf541be96b8828993f0778633 Mon Sep 17 00:00:00 2001
From: "Christopher K. Long" <ckl45@cam.ac.uk>
Date: Sat, 22 Mar 2025 11:23:50 +0000
Subject: [PATCH 22/22] Version 1.1.0

---
 ChangeLog.md   | 8 +++++++-
 README.md      | 2 +-
 pyproject.toml | 2 +-
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/ChangeLog.md b/ChangeLog.md
index 957cbd5..4656fe3 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,6 +1,12 @@
 # [saveable-objects](README.md) Change Log
 
-## Release 1.0.0
+## Release v1.1.0
+
+This release adds support for earlier python versions that 3.10. Specifically the changes in this release are:
+- Support was added for python versions 3.7, 3.8, and 3.9
+- Minor updates to the documentation.
+
+## Release v1.0.0
 
 This is the initial release. Future changes to this release will be documented
 above.
\ No newline at end of file
diff --git a/README.md b/README.md
index 3f1d54f..10ee730 100644
--- a/README.md
+++ b/README.md
@@ -28,5 +28,5 @@ Source code can be found at: [https://github.com/Christopher-K-Long/saveable-obj
 
 ## Version and Changes
 
-The current version is [`1.0.0`](ChangeLog.md#release-100). Please see the [Change Log](ChangeLog.md) for more
+The current version is [`1.1.0`](ChangeLog.md#release-110). Please see the [Change Log](ChangeLog.md) for more
 details.
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index 8252356..4bace66 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "saveable-objects"
-version = "1.0.0"
+version = "1.1.0"
 authors = [
   { name="Christopher_K._Long", email="ckl45@cam.ac.uk" },
 ]