From dc3a72fcf82c08f3e96c7c659f120bd4dcefa0b2 Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Fri, 2 May 2025 17:11:20 -0400
Subject: [PATCH 01/23] Migrating setup.py to pyproject.toml

---
 .github/workflows/tests-gpu.yml |  2 +-
 .github/workflows/upload.yml    |  2 +-
 Makefile                        |  6 +--
 pyproject.toml                  | 78 +++++++++++++++++++++++++++++++++
 4 files changed, 83 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/tests-gpu.yml b/.github/workflows/tests-gpu.yml
index 4c82fdbf39c..058bf381ecb 100644
--- a/.github/workflows/tests-gpu.yml
+++ b/.github/workflows/tests-gpu.yml
@@ -102,7 +102,7 @@ jobs:
 
       - name: Install PennyLane
         run: |
-          python setup.py bdist_wheel
+          python -m build --wheel
           pip install dist/pennylane*.whl
 
       - name: Install Lightning-master
diff --git a/.github/workflows/upload.yml b/.github/workflows/upload.yml
index 93b016728da..2049d5a42b8 100644
--- a/.github/workflows/upload.yml
+++ b/.github/workflows/upload.yml
@@ -39,7 +39,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip wheel
           pip install -r requirements-ci.txt --upgrade
-          python setup.py bdist_wheel
+          python -m build --wheel
 
       - name: Publish
         uses: pypa/gh-action-pypi-publish@release/v1
diff --git a/Makefile b/Makefile
index 8b3bec9be42..ca508c85ed6 100644
--- a/Makefile
+++ b/Makefile
@@ -25,15 +25,15 @@ install:
 ifndef PYTHON3
 	@echo "To install PennyLane you need to have Python 3 installed"
 endif
-	$(PYTHON) setup.py install
+	$(PYTHON) -m pip install .
 
 .PHONY: wheel
 wheel:
-	$(PYTHON) setup.py bdist_wheel
+	$(PYTHON) -m build --wheel
 
 .PHONY: dist
 dist:
-	$(PYTHON) setup.py sdist
+	$(PYTHON) -m build --sdist 
 
 .PHONY : clean
 clean:
diff --git a/pyproject.toml b/pyproject.toml
index 8f25644083c..69d909d287e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,81 @@
+[build-system]
+requires = ["cmake", "setuptools>=68", "tomli"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "Pennylane"
+description = "PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network."
+readme = "README.md"
+license = {text = "Apache License 2.0"}
+requires-python = ">=3.10"
+dynamic = ["version"]
+maintainers = [
+    { name = "Xanadu Inc.", email = "software@xanadu.ai" },
+]
+dependencies = [
+    "numpy",
+    "scipy",
+    "networkx",
+    "rustworkx>=0.14.0",
+    "autograd",
+    "appdirs",
+    "autoray>=0.6.11",
+    "cachetools",
+    "pennylane-lightning>=0.41",
+    "requests",
+    "tomli",
+    "typing_extensions",
+    "packaging",
+    "diastatic-malt",
+]
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Environment :: Console",
+    "Intended Audience :: Science/Research",
+    "License :: OSI Approved :: Apache Software License",
+    "Natural Language :: English",
+    "Operating System :: POSIX",
+    "Operating System :: MacOS :: MacOS X",
+    "Operating System :: POSIX :: Linux",
+    "Operating System :: Microsoft :: Windows",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3 :: Only",
+    "Topic :: Scientific/Engineering :: Physics",
+]
+
+[project.urls]
+repository = "https://github.com/PennyLaneAI/pennylane",
+
+[project.optional-dependencies]
+kernels = ["cvxpy", "cvxopt"]
+
+[project.scripts]
+pl-device-test = "pennylane.devices.tests:cli"
+
+[project.entry-points."pennylane.plugins"]
+"default.qubit" = "pennylane.devices:DefaultQubit"
+"default.gaussian" = "pennylane.devices:DefaultGaussian"
+"default.mixed" = "pennylane.devices.default_mixed:DefaultMixed"
+"reference.qubit" = "pennylane.devices.reference_qubit:ReferenceQubit"
+"null.qubit" = "pennylane.devices.null_qubit:NullQubit"
+"default.qutrit" = "pennylane.devices.default_qutrit:DefaultQutrit"
+"default.clifford" = "pennylane.devices.default_clifford:DefaultClifford"
+"default.qutrit.mixed" = "pennylane.devices.default_qutrit_mixed:DefaultQutritMixed"
+"default.tensor" = "pennylane.devices.default_tensor:DefaultTensor"
+
+[tool.setuptools]
+include-package-data = true
+
+[tool.setuptools.packages.find]
+where = ["pennylane"]
+
+[tool.setuptools.package-data]
+pennylane = ["devices/tests/pytest.ini", "drawer/plot.mplstyle"]
+
 [tool.black]
 line-length = 100
 include = '\.pyi?$'

From 97c48c50ff2dbf0e6794814741e63903153a89f5 Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Fri, 2 May 2025 17:14:03 -0400
Subject: [PATCH 02/23] fixed typo

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

diff --git a/pyproject.toml b/pyproject.toml
index 69d909d287e..7714c5785cf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -48,7 +48,7 @@ classifiers = [
 ]
 
 [project.urls]
-repository = "https://github.com/PennyLaneAI/pennylane",
+repository = "https://github.com/PennyLaneAI/pennylane"
 
 [project.optional-dependencies]
 kernels = ["cvxpy", "cvxopt"]

From c18d0ee3bf87cbf04eb3b9964f85696425b52bb0 Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Fri, 2 May 2025 17:21:25 -0400
Subject: [PATCH 03/23] Adding numpy to toml

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

diff --git a/pyproject.toml b/pyproject.toml
index 7714c5785cf..597079b8792 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["cmake", "setuptools>=68", "tomli"]
+requires = ["cmake", "setuptools>=68", "tomli","numpy"]
 build-backend = "setuptools.build_meta"
 
 [project]

From aa722ae593038392f32e4634a3dff748c454a3aa Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Fri, 2 May 2025 17:26:34 -0400
Subject: [PATCH 04/23] removing numpy

---
 pyproject.toml | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/pyproject.toml b/pyproject.toml
index 597079b8792..218b8064304 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["cmake", "setuptools>=68", "tomli","numpy"]
+requires = ["cmake", "setuptools>=68", "tomli"]
 build-backend = "setuptools.build_meta"
 
 [project]
@@ -13,7 +13,6 @@ maintainers = [
     { name = "Xanadu Inc.", email = "software@xanadu.ai" },
 ]
 dependencies = [
-    "numpy",
     "scipy",
     "networkx",
     "rustworkx>=0.14.0",

From c1c4e2440678d861b037ff2fb5942ae1cf95d5ef Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Mon, 5 May 2025 10:26:57 -0400
Subject: [PATCH 05/23] updated pyproj

---
 pyproject.toml | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/pyproject.toml b/pyproject.toml
index 218b8064304..96d0f365c8a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,12 +6,8 @@ build-backend = "setuptools.build_meta"
 name = "Pennylane"
 description = "PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network."
 readme = "README.md"
-license = {text = "Apache License 2.0"}
 requires-python = ">=3.10"
 dynamic = ["version"]
-maintainers = [
-    { name = "Xanadu Inc.", email = "software@xanadu.ai" },
-]
 dependencies = [
     "scipy",
     "networkx",
@@ -26,6 +22,7 @@ dependencies = [
     "typing_extensions",
     "packaging",
     "diastatic-malt",
+    "numpy"
 ]
 classifiers = [
     "Development Status :: 4 - Beta",
@@ -45,6 +42,9 @@ classifiers = [
     "Programming Language :: Python :: 3 :: Only",
     "Topic :: Scientific/Engineering :: Physics",
 ]
+[[project.maintainers]]
+name = "Xanadu Quantum Technologies Inc."
+email = "software@xanadu.ai"
 
 [project.urls]
 repository = "https://github.com/PennyLaneAI/pennylane"
@@ -69,6 +69,9 @@ pl-device-test = "pennylane.devices.tests:cli"
 [tool.setuptools]
 include-package-data = true
 
+[project.license]
+text = "Apache License 2.0"
+
 [tool.setuptools.packages.find]
 where = ["pennylane"]
 

From be862366e31fe63eb5d3a809eefc9ef07c8cfeec Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Mon, 5 May 2025 11:17:02 -0400
Subject: [PATCH 06/23] removed packages find

---
 pyproject.toml | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/pyproject.toml b/pyproject.toml
index 96d0f365c8a..78c3e40d337 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -72,9 +72,6 @@ include-package-data = true
 [project.license]
 text = "Apache License 2.0"
 
-[tool.setuptools.packages.find]
-where = ["pennylane"]
-
 [tool.setuptools.package-data]
 pennylane = ["devices/tests/pytest.ini", "drawer/plot.mplstyle"]
 

From 02f27909db800219e66357200e986f716570207e Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Mon, 5 May 2025 11:30:14 -0400
Subject: [PATCH 07/23] Trigger Build


From e099c96ba0a4dfd84f59d4ae0db0c423b9b76f0f Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Tue, 6 May 2025 10:09:17 -0400
Subject: [PATCH 08/23] removed setup.py

---
 pyproject.toml |  5 ++-
 setup.py       | 93 --------------------------------------------------
 2 files changed, 4 insertions(+), 94 deletions(-)
 delete mode 100644 setup.py

diff --git a/pyproject.toml b/pyproject.toml
index 78c3e40d337..d64ba83e4c3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["cmake", "setuptools>=68", "tomli"]
+requires = ["cmake", "setuptools>=75", "tomli"]
 build-backend = "setuptools.build_meta"
 
 [project]
@@ -68,6 +68,9 @@ pl-device-test = "pennylane.devices.tests:cli"
 
 [tool.setuptools]
 include-package-data = true
+py-modules = []
+
+[tool.setuptools_scm]
 
 [project.license]
 text = "Apache License 2.0"
diff --git a/setup.py b/setup.py
deleted file mode 100644
index b65d80b52e8..00000000000
--- a/setup.py
+++ /dev/null
@@ -1,93 +0,0 @@
-# Copyright 2018-2024 Xanadu Quantum Technologies Inc.
-
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-
-#     http://www.apache.org/licenses/LICENSE-2.0
-
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Setup file for package installation."""
-# pylint: disable=unspecified-encoding, consider-using-with
-
-from setuptools import find_packages, setup
-
-with open("pennylane/_version.py") as f:
-    version = f.readlines()[-1].split()[-1].strip("\"'")
-
-requirements = [
-    "numpy",
-    "scipy",
-    "networkx",
-    "rustworkx>=0.14.0",
-    "autograd",
-    "tomlkit",
-    "appdirs",
-    "autoray>=0.6.11",
-    "cachetools",
-    "pennylane-lightning>=0.41",
-    "requests",
-    "typing_extensions",
-    "packaging",
-    "diastatic-malt",
-]
-
-info = {
-    "name": "PennyLane",
-    "version": version,
-    "maintainer": "Xanadu Inc.",
-    "maintainer_email": "software@xanadu.ai",
-    "url": "https://github.com/PennyLaneAI/pennylane",
-    "license": "Apache License 2.0",
-    "packages": find_packages(where="."),
-    "entry_points": {
-        # TODO: rename entry point 'pennylane.plugins' to 'pennylane.devices'.
-        # This requires a rename in the setup file of all devices, and is best done during another refactor
-        "pennylane.plugins": [
-            "default.qubit = pennylane.devices:DefaultQubit",
-            "default.gaussian = pennylane.devices:DefaultGaussian",
-            "default.mixed = pennylane.devices.default_mixed:DefaultMixed",
-            "reference.qubit = pennylane.devices.reference_qubit:ReferenceQubit",
-            "null.qubit = pennylane.devices.null_qubit:NullQubit",
-            "default.qutrit = pennylane.devices.default_qutrit:DefaultQutrit",
-            "default.clifford = pennylane.devices.default_clifford:DefaultClifford",
-            "default.qutrit.mixed = pennylane.devices.default_qutrit_mixed:DefaultQutritMixed",
-            "default.tensor = pennylane.devices.default_tensor:DefaultTensor",
-        ],
-        "console_scripts": ["pl-device-test=pennylane.devices.tests:cli"],
-    },
-    "description": "PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network.",
-    "long_description": open("README.md").read(),
-    "long_description_content_type": "text/markdown",
-    "provides": ["pennylane"],
-    "install_requires": requirements,
-    "extras_require": {"kernels": ["cvxpy", "cvxopt"]},
-    "package_data": {"pennylane": ["devices/tests/pytest.ini", "drawer/plot.mplstyle"]},
-    "include_package_data": True,
-}
-
-classifiers = [
-    "Development Status :: 4 - Beta",
-    "Environment :: Console",
-    "Intended Audience :: Science/Research",
-    "License :: OSI Approved :: Apache Software License",
-    "Natural Language :: English",
-    "Operating System :: POSIX",
-    "Operating System :: MacOS :: MacOS X",
-    "Operating System :: POSIX :: Linux",
-    "Operating System :: Microsoft :: Windows",
-    "Programming Language :: Python",
-    "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.10",
-    "Programming Language :: Python :: 3.11",
-    "Programming Language :: Python :: 3.12",
-    "Programming Language :: Python :: 3 :: Only",
-    "Topic :: Scientific/Engineering :: Physics",
-]
-
-setup(classifiers=classifiers, **(info))

From ce341422267b52b98da2bda030bc9b5929e3ecb8 Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Tue, 6 May 2025 13:20:12 -0400
Subject: [PATCH 09/23] added tools dynamic

---
 pyproject.toml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pyproject.toml b/pyproject.toml
index d64ba83e4c3..d425395645f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -70,6 +70,9 @@ pl-device-test = "pennylane.devices.tests:cli"
 include-package-data = true
 py-modules = []
 
+[tool.setuptools.dynamic]
+version = {attr = "pennylane._version.__version__"} 
+
 [tool.setuptools_scm]
 
 [project.license]

From 59a0df499c941b7d6a245bcdca15eb4d7b507146 Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Tue, 6 May 2025 13:53:16 -0400
Subject: [PATCH 10/23] Trigger Build


From e1fda00374a94d912e429a133e89ca9b883f1d18 Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Tue, 6 May 2025 15:49:28 -0400
Subject: [PATCH 11/23] setup.py

---
 setup.py | 93 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 setup.py

diff --git a/setup.py b/setup.py
new file mode 100644
index 00000000000..b65d80b52e8
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,93 @@
+# Copyright 2018-2024 Xanadu Quantum Technologies Inc.
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Setup file for package installation."""
+# pylint: disable=unspecified-encoding, consider-using-with
+
+from setuptools import find_packages, setup
+
+with open("pennylane/_version.py") as f:
+    version = f.readlines()[-1].split()[-1].strip("\"'")
+
+requirements = [
+    "numpy",
+    "scipy",
+    "networkx",
+    "rustworkx>=0.14.0",
+    "autograd",
+    "tomlkit",
+    "appdirs",
+    "autoray>=0.6.11",
+    "cachetools",
+    "pennylane-lightning>=0.41",
+    "requests",
+    "typing_extensions",
+    "packaging",
+    "diastatic-malt",
+]
+
+info = {
+    "name": "PennyLane",
+    "version": version,
+    "maintainer": "Xanadu Inc.",
+    "maintainer_email": "software@xanadu.ai",
+    "url": "https://github.com/PennyLaneAI/pennylane",
+    "license": "Apache License 2.0",
+    "packages": find_packages(where="."),
+    "entry_points": {
+        # TODO: rename entry point 'pennylane.plugins' to 'pennylane.devices'.
+        # This requires a rename in the setup file of all devices, and is best done during another refactor
+        "pennylane.plugins": [
+            "default.qubit = pennylane.devices:DefaultQubit",
+            "default.gaussian = pennylane.devices:DefaultGaussian",
+            "default.mixed = pennylane.devices.default_mixed:DefaultMixed",
+            "reference.qubit = pennylane.devices.reference_qubit:ReferenceQubit",
+            "null.qubit = pennylane.devices.null_qubit:NullQubit",
+            "default.qutrit = pennylane.devices.default_qutrit:DefaultQutrit",
+            "default.clifford = pennylane.devices.default_clifford:DefaultClifford",
+            "default.qutrit.mixed = pennylane.devices.default_qutrit_mixed:DefaultQutritMixed",
+            "default.tensor = pennylane.devices.default_tensor:DefaultTensor",
+        ],
+        "console_scripts": ["pl-device-test=pennylane.devices.tests:cli"],
+    },
+    "description": "PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network.",
+    "long_description": open("README.md").read(),
+    "long_description_content_type": "text/markdown",
+    "provides": ["pennylane"],
+    "install_requires": requirements,
+    "extras_require": {"kernels": ["cvxpy", "cvxopt"]},
+    "package_data": {"pennylane": ["devices/tests/pytest.ini", "drawer/plot.mplstyle"]},
+    "include_package_data": True,
+}
+
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Environment :: Console",
+    "Intended Audience :: Science/Research",
+    "License :: OSI Approved :: Apache Software License",
+    "Natural Language :: English",
+    "Operating System :: POSIX",
+    "Operating System :: MacOS :: MacOS X",
+    "Operating System :: POSIX :: Linux",
+    "Operating System :: Microsoft :: Windows",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3 :: Only",
+    "Topic :: Scientific/Engineering :: Physics",
+]
+
+setup(classifiers=classifiers, **(info))

From f6326a5880067acf7c5be236af35928ac21aedf3 Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Tue, 6 May 2025 16:31:06 -0400
Subject: [PATCH 12/23] update dockerfile

---
 docker/interfaces/gpu-cuda/cuda-base.dockerfile | 2 +-
 docker/pennylane.dockerfile                     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/docker/interfaces/gpu-cuda/cuda-base.dockerfile b/docker/interfaces/gpu-cuda/cuda-base.dockerfile
index 1c9ac554560..04d8b7d121f 100644
--- a/docker/interfaces/gpu-cuda/cuda-base.dockerfile
+++ b/docker/interfaces/gpu-cuda/cuda-base.dockerfile
@@ -42,7 +42,7 @@ COPY  . .
 RUN git submodule update --init --recursive \
     && pip install wheel \
     && pip install -r requirements.txt \
-    && python3 setup.py install \
+    && python3 -m pip install . \
     && pip install -r requirements-dev.txt \
     && make test
 
diff --git a/docker/pennylane.dockerfile b/docker/pennylane.dockerfile
index cbb7f40f0a4..80e562a5664 100644
--- a/docker/pennylane.dockerfile
+++ b/docker/pennylane.dockerfile
@@ -41,7 +41,7 @@ WORKDIR /opt/pennylane
 COPY  . .
 RUN git submodule update --init --recursive
 RUN pip install wheel && pip install -r requirements.txt
-RUN python3 setup.py install
+RUN python3 -m pip install .
 RUN pip install -r requirements-dev.txt
 RUN pip install -i https://test.pypi.org/simple/ pennylane-lightning --pre --upgrade
 # hotfix, remove when pyscf 2.1 is released (currently no wheel for python3.10)

From 616de659e3665ca921a0a26f19688411c63031ea Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Tue, 6 May 2025 16:34:24 -0400
Subject: [PATCH 13/23] remove setup.py

---
 setup.py | 92 --------------------------------------------------------
 1 file changed, 92 deletions(-)
 delete mode 100644 setup.py

diff --git a/setup.py b/setup.py
deleted file mode 100644
index 1595dbc121a..00000000000
--- a/setup.py
+++ /dev/null
@@ -1,92 +0,0 @@
-# Copyright 2018-2024 Xanadu Quantum Technologies Inc.
-
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-
-#     http://www.apache.org/licenses/LICENSE-2.0
-
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Setup file for package installation."""
-# pylint: disable=unspecified-encoding, consider-using-with
-
-from setuptools import find_packages, setup
-
-with open("pennylane/_version.py") as f:
-    version = f.readlines()[-1].split()[-1].strip("\"'")
-
-requirements = [
-    "numpy",
-    "scipy",
-    "networkx",
-    "rustworkx>=0.14.0",
-    "autograd",
-    "tomlkit",
-    "appdirs",
-    "autoray>=0.6.11",
-    "cachetools",
-    "pennylane-lightning>=0.41",
-    "requests",
-    "typing_extensions",
-    "packaging",
-    "diastatic-malt",
-]
-
-info = {
-    "name": "PennyLane",
-    "version": version,
-    "maintainer": "Xanadu Inc.",
-    "maintainer_email": "software@xanadu.ai",
-    "url": "https://github.com/PennyLaneAI/pennylane",
-    "license": "Apache License 2.0",
-    "packages": find_packages(where="."),
-    "entry_points": {
-        # TODO: rename entry point 'pennylane.plugins' to 'pennylane.devices'.
-        # This requires a rename in the setup file of all devices, and is best done during another refactor
-        "pennylane.plugins": [
-            "default.qubit = pennylane.devices:DefaultQubit",
-            "default.gaussian = pennylane.devices:DefaultGaussian",
-            "default.mixed = pennylane.devices.default_mixed:DefaultMixed",
-            "reference.qubit = pennylane.devices.reference_qubit:ReferenceQubit",
-            "null.qubit = pennylane.devices.null_qubit:NullQubit",
-            "default.qutrit = pennylane.devices.default_qutrit:DefaultQutrit",
-            "default.clifford = pennylane.devices.default_clifford:DefaultClifford",
-            "default.qutrit.mixed = pennylane.devices.default_qutrit_mixed:DefaultQutritMixed",
-            "default.tensor = pennylane.devices.default_tensor:DefaultTensor",
-        ],
-        "console_scripts": ["pl-device-test=pennylane.devices.tests:cli"],
-    },
-    "description": "PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network.",
-    "long_description": open("README.md").read(),
-    "long_description_content_type": "text/markdown",
-    "provides": ["pennylane"],
-    "install_requires": requirements,
-    "extras_require": {"kernels": ["cvxpy", "cvxopt"]},
-    "package_data": {"pennylane": ["devices/tests/pytest.ini", "drawer/plot.mplstyle"]},
-    "include_package_data": True,
-}
-
-classifiers = [
-    "Development Status :: 4 - Beta",
-    "Environment :: Console",
-    "Intended Audience :: Science/Research",
-    "Natural Language :: English",
-    "Operating System :: POSIX",
-    "Operating System :: MacOS :: MacOS X",
-    "Operating System :: POSIX :: Linux",
-    "Operating System :: Microsoft :: Windows",
-    "Programming Language :: Python",
-    "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.10",
-    "Programming Language :: Python :: 3.11",
-    "Programming Language :: Python :: 3.12",
-    "Programming Language :: Python :: 3 :: Only",
-    "Topic :: Scientific/Engineering :: Physics",
-]
-
-setup(classifiers=classifiers, **(info))

From 58eab8ebdd2a8e628601c878abacc20d5ffed57a Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Wed, 7 May 2025 11:55:05 -0400
Subject: [PATCH 14/23] Moving setup.py to bacup file

---
 setup.py.bak | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 setup.py.bak

diff --git a/setup.py.bak b/setup.py.bak
new file mode 100644
index 00000000000..9753f1acb08
--- /dev/null
+++ b/setup.py.bak
@@ -0,0 +1,92 @@
+# Copyright 2018-2024 Xanadu Quantum Technologies Inc.
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Old setup file for package installation; kept for reference."""
+# pylint: disable=unspecified-encoding, consider-using-with
+
+from setuptools import find_packages, setup
+
+with open("pennylane/_version.py") as f:
+    version = f.readlines()[-1].split()[-1].strip("\"'")
+
+requirements = [
+    "numpy",
+    "scipy",
+    "networkx",
+    "rustworkx>=0.14.0",
+    "autograd",
+    "tomlkit",
+    "appdirs",
+    "autoray>=0.6.11",
+    "cachetools",
+    "pennylane-lightning>=0.41",
+    "requests",
+    "typing_extensions",
+    "packaging",
+    "diastatic-malt",
+]
+
+info = {
+    "name": "PennyLane",
+    "version": version,
+    "maintainer": "Xanadu Inc.",
+    "maintainer_email": "software@xanadu.ai",
+    "url": "https://github.com/PennyLaneAI/pennylane",
+    "license": "Apache License 2.0",
+    "packages": find_packages(where="."),
+    "entry_points": {
+        # TODO: rename entry point 'pennylane.plugins' to 'pennylane.devices'.
+        # This requires a rename in the setup file of all devices, and is best done during another refactor
+        "pennylane.plugins": [
+            "default.qubit = pennylane.devices:DefaultQubit",
+            "default.gaussian = pennylane.devices:DefaultGaussian",
+            "default.mixed = pennylane.devices.default_mixed:DefaultMixed",
+            "reference.qubit = pennylane.devices.reference_qubit:ReferenceQubit",
+            "null.qubit = pennylane.devices.null_qubit:NullQubit",
+            "default.qutrit = pennylane.devices.default_qutrit:DefaultQutrit",
+            "default.clifford = pennylane.devices.default_clifford:DefaultClifford",
+            "default.qutrit.mixed = pennylane.devices.default_qutrit_mixed:DefaultQutritMixed",
+            "default.tensor = pennylane.devices.default_tensor:DefaultTensor",
+        ],
+        "console_scripts": ["pl-device-test=pennylane.devices.tests:cli"],
+    },
+    "description": "PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network.",
+    "long_description": open("README.md").read(),
+    "long_description_content_type": "text/markdown",
+    "provides": ["pennylane"],
+    "install_requires": requirements,
+    "extras_require": {"kernels": ["cvxpy", "cvxopt"]},
+    "package_data": {"pennylane": ["devices/tests/pytest.ini", "drawer/plot.mplstyle"]},
+    "include_package_data": True,
+}
+
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Environment :: Console",
+    "Intended Audience :: Science/Research",
+    "Natural Language :: English",
+    "Operating System :: POSIX",
+    "Operating System :: MacOS :: MacOS X",
+    "Operating System :: POSIX :: Linux",
+    "Operating System :: Microsoft :: Windows",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3 :: Only",
+    "Topic :: Scientific/Engineering :: Physics",
+]
+
+setup(classifiers=classifiers, **(info))

From 6330f0df42f213d6fc42113cfff11bce4ade6793 Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Wed, 7 May 2025 11:57:27 -0400
Subject: [PATCH 15/23] changing to setup-dev

---
 setup.py.bak | 92 ----------------------------------------------------
 1 file changed, 92 deletions(-)
 delete mode 100644 setup.py.bak

diff --git a/setup.py.bak b/setup.py.bak
deleted file mode 100644
index 9753f1acb08..00000000000
--- a/setup.py.bak
+++ /dev/null
@@ -1,92 +0,0 @@
-# Copyright 2018-2024 Xanadu Quantum Technologies Inc.
-
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-
-#     http://www.apache.org/licenses/LICENSE-2.0
-
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Old setup file for package installation; kept for reference."""
-# pylint: disable=unspecified-encoding, consider-using-with
-
-from setuptools import find_packages, setup
-
-with open("pennylane/_version.py") as f:
-    version = f.readlines()[-1].split()[-1].strip("\"'")
-
-requirements = [
-    "numpy",
-    "scipy",
-    "networkx",
-    "rustworkx>=0.14.0",
-    "autograd",
-    "tomlkit",
-    "appdirs",
-    "autoray>=0.6.11",
-    "cachetools",
-    "pennylane-lightning>=0.41",
-    "requests",
-    "typing_extensions",
-    "packaging",
-    "diastatic-malt",
-]
-
-info = {
-    "name": "PennyLane",
-    "version": version,
-    "maintainer": "Xanadu Inc.",
-    "maintainer_email": "software@xanadu.ai",
-    "url": "https://github.com/PennyLaneAI/pennylane",
-    "license": "Apache License 2.0",
-    "packages": find_packages(where="."),
-    "entry_points": {
-        # TODO: rename entry point 'pennylane.plugins' to 'pennylane.devices'.
-        # This requires a rename in the setup file of all devices, and is best done during another refactor
-        "pennylane.plugins": [
-            "default.qubit = pennylane.devices:DefaultQubit",
-            "default.gaussian = pennylane.devices:DefaultGaussian",
-            "default.mixed = pennylane.devices.default_mixed:DefaultMixed",
-            "reference.qubit = pennylane.devices.reference_qubit:ReferenceQubit",
-            "null.qubit = pennylane.devices.null_qubit:NullQubit",
-            "default.qutrit = pennylane.devices.default_qutrit:DefaultQutrit",
-            "default.clifford = pennylane.devices.default_clifford:DefaultClifford",
-            "default.qutrit.mixed = pennylane.devices.default_qutrit_mixed:DefaultQutritMixed",
-            "default.tensor = pennylane.devices.default_tensor:DefaultTensor",
-        ],
-        "console_scripts": ["pl-device-test=pennylane.devices.tests:cli"],
-    },
-    "description": "PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network.",
-    "long_description": open("README.md").read(),
-    "long_description_content_type": "text/markdown",
-    "provides": ["pennylane"],
-    "install_requires": requirements,
-    "extras_require": {"kernels": ["cvxpy", "cvxopt"]},
-    "package_data": {"pennylane": ["devices/tests/pytest.ini", "drawer/plot.mplstyle"]},
-    "include_package_data": True,
-}
-
-classifiers = [
-    "Development Status :: 4 - Beta",
-    "Environment :: Console",
-    "Intended Audience :: Science/Research",
-    "Natural Language :: English",
-    "Operating System :: POSIX",
-    "Operating System :: MacOS :: MacOS X",
-    "Operating System :: POSIX :: Linux",
-    "Operating System :: Microsoft :: Windows",
-    "Programming Language :: Python",
-    "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.10",
-    "Programming Language :: Python :: 3.11",
-    "Programming Language :: Python :: 3.12",
-    "Programming Language :: Python :: 3 :: Only",
-    "Topic :: Scientific/Engineering :: Physics",
-]
-
-setup(classifiers=classifiers, **(info))

From adf55ea803ee08bab21d5ce3d9f022750e3fc36d Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Wed, 7 May 2025 14:30:27 -0400
Subject: [PATCH 16/23] changed setup.py

---
 setup.py | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 setup.py

diff --git a/setup.py b/setup.py
new file mode 100644
index 00000000000..b82413d10f2
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,92 @@
+# Copyright 2018-2024 Xanadu Quantum Technologies Inc.
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Old setup file for package installation; kept for reference."""
+# pylint: disable=unspecified-encoding, consider-using-with
+
+from setuptools import find_packages, setup
+
+with open("pennylane/_version.py") as f:
+    version = f.readlines()[-1].split()[-1].strip("\"'")
+
+requirements = [
+    "numpy",
+    "scipy",
+    "networkx",
+    "rustworkx>=0.14.0",
+    "autograd",
+    "tomlkit",
+    "appdirs",
+    "autoray>=0.6.11",
+    "cachetools",
+    "pennylane-lightning>=0.41",
+    "requests",
+    "typing_extensions",
+    "packaging",
+    "diastatic-malt",
+]
+
+info = {
+    "name": "PennyLane",
+    "version": version,
+    "maintainer": "Xanadu Inc.",
+    "maintainer_email": "software@xanadu.ai",
+    "url": "https://github.com/PennyLaneAI/pennylane",
+    "license": "Apache License 2.0",
+    "packages": find_packages(where="."),
+    "entry_points": {
+        # TODO: rename entry point 'pennylane.plugins' to 'pennylane.devices'.
+        # This requires a rename in the setup file of all devices, and is best done during another refactor
+        "pennylane.plugins": [
+            "default.qubit = pennylane.devices:DefaultQubit",
+            "default.gaussian = pennylane.devices:DefaultGaussian",
+            "default.mixed = pennylane.devices.default_mixed:DefaultMixed",
+            "reference.qubit = pennylane.devices.reference_qubit:ReferenceQubit",
+            "null.qubit = pennylane.devices.null_qubit:NullQubit",
+            "default.qutrit = pennylane.devices.default_qutrit:DefaultQutrit",
+            "default.clifford = pennylane.devices.default_clifford:DefaultClifford",
+            "default.qutrit.mixed = pennylane.devices.default_qutrit_mixed:DefaultQutritMixed",
+            "default.tensor = pennylane.devices.default_tensor:DefaultTensor",
+        ],
+        "console_scripts": ["pl-device-test=pennylane.devices.tests:cli"],
+    },
+    "description": "PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network.",
+    "long_description": open("README.md").read(),
+    "long_description_content_type": "text/markdown",
+    "provides": ["pennylane"],
+    "install_requires": requirements,
+    "extras_require": {"kernels": ["cvxpy", "cvxopt"]},
+    "package_data": {"pennylane": ["devices/tests/pytest.ini", "drawer/plot.mplstyle"]},
+    "include_package_data": True,
+}
+
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Environment :: Console",
+    "Intended Audience :: Science/Research",
+    "Natural Language :: English",
+    "Operating System :: POSIX",
+    "Operating System :: MacOS :: MacOS X",
+    "Operating System :: POSIX :: Linux",
+    "Operating System :: Microsoft :: Windows",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3 :: Only",
+    "Topic :: Scientific/Engineering :: Physics",
+]
+
+setup()

From e646c88894e568502177df5ece2faafe73c74a5c Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Wed, 7 May 2025 14:45:22 -0400
Subject: [PATCH 17/23] Moved license in toml

---
 pyproject.toml | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/pyproject.toml b/pyproject.toml
index d425395645f..66bd51fda96 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,6 +6,7 @@ build-backend = "setuptools.build_meta"
 name = "Pennylane"
 description = "PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network."
 readme = "README.md"
+license = {text = "Apache-2.0"}
 requires-python = ">=3.10"
 dynamic = ["version"]
 dependencies = [
@@ -75,9 +76,6 @@ version = {attr = "pennylane._version.__version__"}
 
 [tool.setuptools_scm]
 
-[project.license]
-text = "Apache License 2.0"
-
 [tool.setuptools.package-data]
 pennylane = ["devices/tests/pytest.ini", "drawer/plot.mplstyle"]
 

From afb79144a1e7ccd9640d216e9ca9fef7d3337ce9 Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Wed, 7 May 2025 15:45:39 -0400
Subject: [PATCH 18/23] fixed licence in classifiers

---
 pyproject.toml | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/pyproject.toml b/pyproject.toml
index 66bd51fda96..29ee772b553 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "setuptools.build_meta"
 name = "Pennylane"
 description = "PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network."
 readme = "README.md"
-license = {text = "Apache-2.0"}
+license =  "Apache-2.0"
 requires-python = ">=3.10"
 dynamic = ["version"]
 dependencies = [
@@ -29,7 +29,6 @@ classifiers = [
     "Development Status :: 4 - Beta",
     "Environment :: Console",
     "Intended Audience :: Science/Research",
-    "License :: OSI Approved :: Apache Software License",
     "Natural Language :: English",
     "Operating System :: POSIX",
     "Operating System :: MacOS :: MacOS X",

From 3c174006a5925df647ca5ba83eae384adaa438bc Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Wed, 7 May 2025 16:04:56 -0400
Subject: [PATCH 19/23] updated changelog-dev

---
 doc/releases/changelog-dev.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/doc/releases/changelog-dev.md b/doc/releases/changelog-dev.md
index 7cae085ba7a..8b579a59737 100644
--- a/doc/releases/changelog-dev.md
+++ b/doc/releases/changelog-dev.md
@@ -175,6 +175,8 @@
 
 * Sphinx version was updated to 8.1. Sphinx is upgraded to version 8.1 and uses Python 3.10. References to intersphinx (e.g. `<demos/>` or `<catalyst/>` are updated to remove the :doc: prefix that is incompatible with sphinx 8.1. [(7212)](https://github.com/PennyLaneAI/pennylane/pull/7212)
 
+* Migrated `setup.py` package build and install to `pyproject.toml` [(#7375)](https://github.com/PennyLaneAI/pennylane/pull/7375)
+
 <h3>Breaking changes 💔</h3>
 
 * The `return_type` property of `MeasurementProcess` has been removed. Please use `isinstance` for type checking instead.

From bccd63899098b726665a45f7a8ccd6979543564f Mon Sep 17 00:00:00 2001
From: runora95 <59572091+runora95@users.noreply.github.com>
Date: Thu, 8 May 2025 13:55:26 -0400
Subject: [PATCH 20/23] Update doc/releases/changelog-dev.md

Co-authored-by: Yushao Chen (Jerry) <chenys13@outlook.com>
---
 doc/releases/changelog-dev.md | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/doc/releases/changelog-dev.md b/doc/releases/changelog-dev.md
index 8b579a59737..10693a121d3 100644
--- a/doc/releases/changelog-dev.md
+++ b/doc/releases/changelog-dev.md
@@ -173,9 +173,11 @@
   interface to maintain a list of special implementations.
   [(#7327)](https://github.com/PennyLaneAI/pennylane/pull/7327)
 
-* Sphinx version was updated to 8.1. Sphinx is upgraded to version 8.1 and uses Python 3.10. References to intersphinx (e.g. `<demos/>` or `<catalyst/>` are updated to remove the :doc: prefix that is incompatible with sphinx 8.1. [(7212)](https://github.com/PennyLaneAI/pennylane/pull/7212)
+* Sphinx version was updated to 8.1. Sphinx is upgraded to version 8.1 and uses Python 3.10. References to intersphinx (e.g. `<demos/>` or `<catalyst/>` are updated to remove the :doc: prefix that is incompatible with sphinx 8.1.
+  [(7212)](https://github.com/PennyLaneAI/pennylane/pull/7212)
 
-* Migrated `setup.py` package build and install to `pyproject.toml` [(#7375)](https://github.com/PennyLaneAI/pennylane/pull/7375)
+* Migrated `setup.py` package build and install to `pyproject.toml`
+  [(#7375)](https://github.com/PennyLaneAI/pennylane/pull/7375)
 
 <h3>Breaking changes 💔</h3>
 

From 53cf7ba1644efc9fb5c02230ed5b8cb17fb75452 Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Thu, 8 May 2025 14:03:31 -0400
Subject: [PATCH 21/23] removing cmake

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

diff --git a/pyproject.toml b/pyproject.toml
index 29ee772b553..ed01d89b9ee 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["cmake", "setuptools>=75", "tomli"]
+requires = ["setuptools>=75", "tomli"]
 build-backend = "setuptools.build_meta"
 
 [project]

From 61406ed1a38790c7308920c03c658f5b8b2dda60 Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Thu, 8 May 2025 16:44:21 -0400
Subject: [PATCH 22/23] clearing setup.py

---
 setup.py | 89 --------------------------------------------------------
 1 file changed, 89 deletions(-)

diff --git a/setup.py b/setup.py
index b82413d10f2..3e1cbcd3f74 100644
--- a/setup.py
+++ b/setup.py
@@ -1,92 +1,3 @@
-# Copyright 2018-2024 Xanadu Quantum Technologies Inc.
-
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-
-#     http://www.apache.org/licenses/LICENSE-2.0
-
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Old setup file for package installation; kept for reference."""
-# pylint: disable=unspecified-encoding, consider-using-with
-
 from setuptools import find_packages, setup
 
-with open("pennylane/_version.py") as f:
-    version = f.readlines()[-1].split()[-1].strip("\"'")
-
-requirements = [
-    "numpy",
-    "scipy",
-    "networkx",
-    "rustworkx>=0.14.0",
-    "autograd",
-    "tomlkit",
-    "appdirs",
-    "autoray>=0.6.11",
-    "cachetools",
-    "pennylane-lightning>=0.41",
-    "requests",
-    "typing_extensions",
-    "packaging",
-    "diastatic-malt",
-]
-
-info = {
-    "name": "PennyLane",
-    "version": version,
-    "maintainer": "Xanadu Inc.",
-    "maintainer_email": "software@xanadu.ai",
-    "url": "https://github.com/PennyLaneAI/pennylane",
-    "license": "Apache License 2.0",
-    "packages": find_packages(where="."),
-    "entry_points": {
-        # TODO: rename entry point 'pennylane.plugins' to 'pennylane.devices'.
-        # This requires a rename in the setup file of all devices, and is best done during another refactor
-        "pennylane.plugins": [
-            "default.qubit = pennylane.devices:DefaultQubit",
-            "default.gaussian = pennylane.devices:DefaultGaussian",
-            "default.mixed = pennylane.devices.default_mixed:DefaultMixed",
-            "reference.qubit = pennylane.devices.reference_qubit:ReferenceQubit",
-            "null.qubit = pennylane.devices.null_qubit:NullQubit",
-            "default.qutrit = pennylane.devices.default_qutrit:DefaultQutrit",
-            "default.clifford = pennylane.devices.default_clifford:DefaultClifford",
-            "default.qutrit.mixed = pennylane.devices.default_qutrit_mixed:DefaultQutritMixed",
-            "default.tensor = pennylane.devices.default_tensor:DefaultTensor",
-        ],
-        "console_scripts": ["pl-device-test=pennylane.devices.tests:cli"],
-    },
-    "description": "PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network.",
-    "long_description": open("README.md").read(),
-    "long_description_content_type": "text/markdown",
-    "provides": ["pennylane"],
-    "install_requires": requirements,
-    "extras_require": {"kernels": ["cvxpy", "cvxopt"]},
-    "package_data": {"pennylane": ["devices/tests/pytest.ini", "drawer/plot.mplstyle"]},
-    "include_package_data": True,
-}
-
-classifiers = [
-    "Development Status :: 4 - Beta",
-    "Environment :: Console",
-    "Intended Audience :: Science/Research",
-    "Natural Language :: English",
-    "Operating System :: POSIX",
-    "Operating System :: MacOS :: MacOS X",
-    "Operating System :: POSIX :: Linux",
-    "Operating System :: Microsoft :: Windows",
-    "Programming Language :: Python",
-    "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.10",
-    "Programming Language :: Python :: 3.11",
-    "Programming Language :: Python :: 3.12",
-    "Programming Language :: Python :: 3 :: Only",
-    "Topic :: Scientific/Engineering :: Physics",
-]
-
 setup()

From 057539f008aeb662c4ff301fd33f7e0d3c2a5736 Mon Sep 17 00:00:00 2001
From: Runor Agbaire <runor.agbaire@xanadu.ai>
Date: Thu, 8 May 2025 16:50:57 -0400
Subject: [PATCH 23/23] updating requires

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

diff --git a/pyproject.toml b/pyproject.toml
index ed01d89b9ee..3945ccca81b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=75", "tomli"]
+requires = ["setuptools>=75.8.1"]
 build-backend = "setuptools.build_meta"
 
 [project]