We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Dependency versions error
#### Issue description
I made a fork of this project and tried to setup a new virtual environment.

```
python -m venv sf-venv
source sf-venv/bin/active.fish
pip install -r requirements.txt
```

However, I got the following error
``` 
ERROR: Cannot install -r requirements.txt (line 4) and numpy>=1.20 because these package versions have conflicting dependencies.

The conflict is caused by:
    The user requested numpy>=1.20
    tensorflow 2.5.0 depends on numpy~=1.19.2

To fix this you could try to:
1. loosen the range of package versions you've specified
2. remove package versions to allow pip attempt to solve the dependency conflict

ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/user_guide/#fixing-conflicting-dependencies
```

#### Additional information

If it helps, I am using Python 3.9.4 and pip 21.1.1. 

A quick fix would be to downgrade the version of numpy in requirements.txt and solve the issue, but I am not sure it is the best way to go.


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `setup.py`
Content:
```
1 # Copyright 2019 Xanadu Quantum Technologies Inc.
2 
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at
6 
7 #     http://www.apache.org/licenses/LICENSE-2.0
8 
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
14 import os
15 import sys
16 
17 from setuptools import setup, find_packages
18 
19 
20 with open("strawberryfields/_version.py") as f:
21     version = f.readlines()[-1].split()[-1].strip("\"'")
22 
23 
24 requirements = [
25     "numpy>=1.17.4",
26     "scipy>=1.0.0",
27     "sympy>=1.5",
28     "networkx>=2.0",
29     "quantum-blackbird>=0.3.0",
30     "python-dateutil>=2.8.0",
31     "thewalrus>=0.15.0",
32     "numba",
33     "toml",
34     "appdirs",
35     "requests>=2.22.0",
36     "urllib3>=1.25.3",
37 ]
38 
39 info = {
40     "name": "StrawberryFields",
41     "version": version,
42     "maintainer": "Xanadu Inc.",
43     "maintainer_email": "software@xanadu.ai",
44     "url": "https://github.com/XanaduAI/StrawberryFields",
45     "license": "Apache License 2.0",
46     "packages": find_packages(where="."),
47     "package_data": {"strawberryfields": ["backends/data/*", "apps/data/feature_data/*",
48                                           "apps/data/sample_data/*"]},
49     "include_package_data": True,
50     "entry_points" : {
51         'console_scripts': [
52             'sf=strawberryfields.cli:main'
53         ]
54     },
55     "description": "Open source library for continuous-variable quantum computation",
56     "long_description": open("README.rst", encoding="utf-8").read(),
57     "long_description_content_type": "text/x-rst",
58     "provides": ["strawberryfields"],
59     "install_requires": requirements,
60     # 'extras_require': extra_requirements,
61     "command_options": {
62         "build_sphinx": {"version": ("setup.py", version), "release": ("setup.py", version)}
63     },
64 }
65 
66 classifiers = [
67     "Development Status :: 4 - Beta",
68     "Environment :: Console",
69     "Intended Audience :: Science/Research",
70     "License :: OSI Approved :: Apache Software License",
71     "Natural Language :: English",
72     "Operating System :: POSIX",
73     "Operating System :: MacOS :: MacOS X",
74     "Operating System :: POSIX :: Linux",
75     "Operating System :: Microsoft :: Windows",
76     "Programming Language :: Python",
77     "Programming Language :: Python :: 3",
78     "Programming Language :: Python :: 3.7",
79     "Programming Language :: Python :: 3.8",
80     "Programming Language :: Python :: 3.9",
81     "Programming Language :: Python :: 3 :: Only",
82     "Topic :: Scientific/Engineering :: Physics",
83 ]
84 
85 setup(classifiers=classifiers, **(info))
86
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,7 @@
 
 
 requirements = [
-    "numpy>=1.17.4",
+    "numpy>=1.19.2",
     "scipy>=1.0.0",
     "sympy>=1.5",
     "networkx>=2.0",

{"golden_diff": "diff --git a/setup.py b/setup.py\n--- a/setup.py\n+++ b/setup.py\n@@ -22,7 +22,7 @@\n \n \n requirements = [\n-    \"numpy>=1.17.4\",\n+    \"numpy>=1.19.2\",\n     \"scipy>=1.0.0\",\n     \"sympy>=1.5\",\n     \"networkx>=2.0\",\n", "issue": "Dependency versions error\n#### Issue description\r\nI made a fork of this project and tried to setup a new virtual environment.\r\n\r\n```\r\npython -m venv sf-venv\r\nsource sf-venv/bin/active.fish\r\npip install -r requirements.txt\r\n```\r\n\r\nHowever, I got the following error\r\n``` \r\nERROR: Cannot install -r requirements.txt (line 4) and numpy>=1.20 because these package versions have conflicting dependencies.\r\n\r\nThe conflict is caused by:\r\n    The user requested numpy>=1.20\r\n    tensorflow 2.5.0 depends on numpy~=1.19.2\r\n\r\nTo fix this you could try to:\r\n1. loosen the range of package versions you've specified\r\n2. remove package versions to allow pip attempt to solve the dependency conflict\r\n\r\nERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/user_guide/#fixing-conflicting-dependencies\r\n```\r\n\r\n#### Additional information\r\n\r\nIf it helps, I am using Python 3.9.4 and pip 21.1.1. \r\n\r\nA quick fix would be to downgrade the version of numpy in requirements.txt and solve the issue, but I am not sure it is the best way to go.\r\n\n", "before_files": [{"content": "# Copyright 2019 Xanadu Quantum Technologies Inc.\n\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n\n#     http://www.apache.org/licenses/LICENSE-2.0\n\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\nimport os\nimport sys\n\nfrom setuptools import setup, find_packages\n\n\nwith open(\"strawberryfields/_version.py\") as f:\n    version = f.readlines()[-1].split()[-1].strip(\"\\\"'\")\n\n\nrequirements = [\n    \"numpy>=1.17.4\",\n    \"scipy>=1.0.0\",\n    \"sympy>=1.5\",\n    \"networkx>=2.0\",\n    \"quantum-blackbird>=0.3.0\",\n    \"python-dateutil>=2.8.0\",\n    \"thewalrus>=0.15.0\",\n    \"numba\",\n    \"toml\",\n    \"appdirs\",\n    \"requests>=2.22.0\",\n    \"urllib3>=1.25.3\",\n]\n\ninfo = {\n    \"name\": \"StrawberryFields\",\n    \"version\": version,\n    \"maintainer\": \"Xanadu Inc.\",\n    \"maintainer_email\": \"software@xanadu.ai\",\n    \"url\": \"https://github.com/XanaduAI/StrawberryFields\",\n    \"license\": \"Apache License 2.0\",\n    \"packages\": find_packages(where=\".\"),\n    \"package_data\": {\"strawberryfields\": [\"backends/data/*\", \"apps/data/feature_data/*\",\n                                          \"apps/data/sample_data/*\"]},\n    \"include_package_data\": True,\n    \"entry_points\" : {\n        'console_scripts': [\n            'sf=strawberryfields.cli:main'\n        ]\n    },\n    \"description\": \"Open source library for continuous-variable quantum computation\",\n    \"long_description\": open(\"README.rst\", encoding=\"utf-8\").read(),\n    \"long_description_content_type\": \"text/x-rst\",\n    \"provides\": [\"strawberryfields\"],\n    \"install_requires\": requirements,\n    # 'extras_require': extra_requirements,\n    \"command_options\": {\n        \"build_sphinx\": {\"version\": (\"setup.py\", version), \"release\": (\"setup.py\", version)}\n    },\n}\n\nclassifiers = [\n    \"Development Status :: 4 - Beta\",\n    \"Environment :: Console\",\n    \"Intended Audience :: Science/Research\",\n    \"License :: OSI Approved :: Apache Software License\",\n    \"Natural Language :: English\",\n    \"Operating System :: POSIX\",\n    \"Operating System :: MacOS :: MacOS X\",\n    \"Operating System :: POSIX :: Linux\",\n    \"Operating System :: Microsoft :: Windows\",\n    \"Programming Language :: Python\",\n    \"Programming Language :: Python :: 3\",\n    \"Programming Language :: Python :: 3.7\",\n    \"Programming Language :: Python :: 3.8\",\n    \"Programming Language :: Python :: 3.9\",\n    \"Programming Language :: Python :: 3 :: Only\",\n    \"Topic :: Scientific/Engineering :: Physics\",\n]\n\nsetup(classifiers=classifiers, **(info))\n", "path": "setup.py"}], "after_files": [{"content": "# Copyright 2019 Xanadu Quantum Technologies Inc.\n\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n\n#     http://www.apache.org/licenses/LICENSE-2.0\n\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\nimport os\nimport sys\n\nfrom setuptools import setup, find_packages\n\n\nwith open(\"strawberryfields/_version.py\") as f:\n    version = f.readlines()[-1].split()[-1].strip(\"\\\"'\")\n\n\nrequirements = [\n    \"numpy>=1.19.2\",\n    \"scipy>=1.0.0\",\n    \"sympy>=1.5\",\n    \"networkx>=2.0\",\n    \"quantum-blackbird>=0.3.0\",\n    \"python-dateutil>=2.8.0\",\n    \"thewalrus>=0.15.0\",\n    \"numba\",\n    \"toml\",\n    \"appdirs\",\n    \"requests>=2.22.0\",\n    \"urllib3>=1.25.3\",\n]\n\ninfo = {\n    \"name\": \"StrawberryFields\",\n    \"version\": version,\n    \"maintainer\": \"Xanadu Inc.\",\n    \"maintainer_email\": \"software@xanadu.ai\",\n    \"url\": \"https://github.com/XanaduAI/StrawberryFields\",\n    \"license\": \"Apache License 2.0\",\n    \"packages\": find_packages(where=\".\"),\n    \"package_data\": {\"strawberryfields\": [\"backends/data/*\", \"apps/data/feature_data/*\",\n                                          \"apps/data/sample_data/*\"]},\n    \"include_package_data\": True,\n    \"entry_points\" : {\n        'console_scripts': [\n            'sf=strawberryfields.cli:main'\n        ]\n    },\n    \"description\": \"Open source library for continuous-variable quantum computation\",\n    \"long_description\": open(\"README.rst\", encoding=\"utf-8\").read(),\n    \"long_description_content_type\": \"text/x-rst\",\n    \"provides\": [\"strawberryfields\"],\n    \"install_requires\": requirements,\n    # 'extras_require': extra_requirements,\n    \"command_options\": {\n        \"build_sphinx\": {\"version\": (\"setup.py\", version), \"release\": (\"setup.py\", version)}\n    },\n}\n\nclassifiers = [\n    \"Development Status :: 4 - Beta\",\n    \"Environment :: Console\",\n    \"Intended Audience :: Science/Research\",\n    \"License :: OSI Approved :: Apache Software License\",\n    \"Natural Language :: English\",\n    \"Operating System :: POSIX\",\n    \"Operating System :: MacOS :: MacOS X\",\n    \"Operating System :: POSIX :: Linux\",\n    \"Operating System :: Microsoft :: Windows\",\n    \"Programming Language :: Python\",\n    \"Programming Language :: Python :: 3\",\n    \"Programming Language :: Python :: 3.7\",\n    \"Programming Language :: Python :: 3.8\",\n    \"Programming Language :: Python :: 3.9\",\n    \"Programming Language :: Python :: 3 :: Only\",\n    \"Topic :: Scientific/Engineering :: Physics\",\n]\n\nsetup(classifiers=classifiers, **(info))\n", "path": "setup.py"}]}