prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Use extra for asyncio dependencies
  Hello!  The latest release for this library pulls in aiohttp and its dependencies unconditionally, which adds non-trivial burden to projects that don’t need it.  Would you consider using a packaging extra so that people can opt-in?
  
  --- 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 2014 Google 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 
  15 import io
  16 
  17 from setuptools import find_packages
  18 from setuptools import setup
  19 
  20 
  21 DEPENDENCIES = (
  22     "cachetools>=2.0.0,<5.0",
  23     "pyasn1-modules>=0.2.1",
  24     # rsa==4.5 is the last version to support 2.7
  25     # https://github.com/sybrenstuvel/python-rsa/issues/152#issuecomment-643470233
  26     'rsa<4.6; python_version < "3.5"',
  27     'rsa>=3.1.4,<5; python_version >= "3.5"',
  28     "setuptools>=40.3.0",
  29     "six>=1.9.0",
  30     'aiohttp >= 3.6.2, < 4.0.0dev; python_version>="3.6"',
  31 )
  32 
  33 
  34 with io.open("README.rst", "r") as fh:
  35     long_description = fh.read()
  36 
  37 version = "1.22.0"
  38 
  39 setup(
  40     name="google-auth",
  41     version=version,
  42     author="Google Cloud Platform",
  43     author_email="googleapis-packages@google.com",
  44     description="Google Authentication Library",
  45     long_description=long_description,
  46     url="https://github.com/googleapis/google-auth-library-python",
  47     packages=find_packages(exclude=("tests*", "system_tests*")),
  48     namespace_packages=("google",),
  49     install_requires=DEPENDENCIES,
  50     python_requires=">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*",
  51     license="Apache 2.0",
  52     keywords="google auth oauth client",
  53     classifiers=[
  54         "Programming Language :: Python :: 2",
  55         "Programming Language :: Python :: 2.7",
  56         "Programming Language :: Python :: 3",
  57         "Programming Language :: Python :: 3.5",
  58         "Programming Language :: Python :: 3.6",
  59         "Programming Language :: Python :: 3.7",
  60         "Programming Language :: Python :: 3.8",
  61         "Development Status :: 5 - Production/Stable",
  62         "Intended Audience :: Developers",
  63         "License :: OSI Approved :: Apache Software License",
  64         "Operating System :: POSIX",
  65         "Operating System :: Microsoft :: Windows",
  66         "Operating System :: MacOS :: MacOS X",
  67         "Operating System :: OS Independent",
  68         "Topic :: Internet :: WWW/HTTP",
  69     ],
  70 )
  71
  ```
  --- 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()
  
  ```
  
golden_diff: diff --git a/setup.py b/setup.py
  --- a/setup.py
  +++ b/setup.py
  @@ -27,9 +27,9 @@
       'rsa>=3.1.4,<5; python_version >= "3.5"',
       "setuptools>=40.3.0",
       "six>=1.9.0",
  -    'aiohttp >= 3.6.2, < 4.0.0dev; python_version>="3.6"',
   )
   
  +extras = {"aiohttp": "aiohttp >= 3.6.2, < 4.0.0dev; python_version>='3.6'"}
   
   with io.open("README.rst", "r") as fh:
       long_description = fh.read()
  @@ -47,6 +47,7 @@
       packages=find_packages(exclude=("tests*", "system_tests*")),
       namespace_packages=("google",),
       install_requires=DEPENDENCIES,
  +    extras_require=extras,
       python_requires=">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*",
       license="Apache 2.0",
       keywords="google auth oauth client",
  
verification_info: {"golden_diff": "diff --git a/setup.py b/setup.py\n--- a/setup.py\n+++ b/setup.py\n@@ -27,9 +27,9 @@\n     'rsa>=3.1.4,<5; python_version >= \"3.5\"',\n     \"setuptools>=40.3.0\",\n     \"six>=1.9.0\",\n-    'aiohttp >= 3.6.2, < 4.0.0dev; python_version>=\"3.6\"',\n )\n \n+extras = {\"aiohttp\": \"aiohttp >= 3.6.2, < 4.0.0dev; python_version>='3.6'\"}\n \n with io.open(\"README.rst\", \"r\") as fh:\n     long_description = fh.read()\n@@ -47,6 +47,7 @@\n     packages=find_packages(exclude=(\"tests*\", \"system_tests*\")),\n     namespace_packages=(\"google\",),\n     install_requires=DEPENDENCIES,\n+    extras_require=extras,\n     python_requires=\">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*\",\n     license=\"Apache 2.0\",\n     keywords=\"google auth oauth client\",\n", "issue": "Use extra for asyncio dependencies\nHello!  The latest release for this library pulls in aiohttp and its dependencies unconditionally, which adds non-trivial burden to projects that don\u2019t need it.  Would you consider using a packaging extra so that people can opt-in?\n", "before_files": [{"content": "# Copyright 2014 Google 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.\n\nimport io\n\nfrom setuptools import find_packages\nfrom setuptools import setup\n\n\nDEPENDENCIES = (\n    \"cachetools>=2.0.0,<5.0\",\n    \"pyasn1-modules>=0.2.1\",\n    # rsa==4.5 is the last version to support 2.7\n    # https://github.com/sybrenstuvel/python-rsa/issues/152#issuecomment-643470233\n    'rsa<4.6; python_version < \"3.5\"',\n    'rsa>=3.1.4,<5; python_version >= \"3.5\"',\n    \"setuptools>=40.3.0\",\n    \"six>=1.9.0\",\n    'aiohttp >= 3.6.2, < 4.0.0dev; python_version>=\"3.6\"',\n)\n\n\nwith io.open(\"README.rst\", \"r\") as fh:\n    long_description = fh.read()\n\nversion = \"1.22.0\"\n\nsetup(\n    name=\"google-auth\",\n    version=version,\n    author=\"Google Cloud Platform\",\n    author_email=\"googleapis-packages@google.com\",\n    description=\"Google Authentication Library\",\n    long_description=long_description,\n    url=\"https://github.com/googleapis/google-auth-library-python\",\n    packages=find_packages(exclude=(\"tests*\", \"system_tests*\")),\n    namespace_packages=(\"google\",),\n    install_requires=DEPENDENCIES,\n    python_requires=\">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*\",\n    license=\"Apache 2.0\",\n    keywords=\"google auth oauth client\",\n    classifiers=[\n        \"Programming Language :: Python :: 2\",\n        \"Programming Language :: Python :: 2.7\",\n        \"Programming Language :: Python :: 3\",\n        \"Programming Language :: Python :: 3.5\",\n        \"Programming Language :: Python :: 3.6\",\n        \"Programming Language :: Python :: 3.7\",\n        \"Programming Language :: Python :: 3.8\",\n        \"Development Status :: 5 - Production/Stable\",\n        \"Intended Audience :: Developers\",\n        \"License :: OSI Approved :: Apache Software License\",\n        \"Operating System :: POSIX\",\n        \"Operating System :: Microsoft :: Windows\",\n        \"Operating System :: MacOS :: MacOS X\",\n        \"Operating System :: OS Independent\",\n        \"Topic :: Internet :: WWW/HTTP\",\n    ],\n)\n", "path": "setup.py"}], "after_files": [{"content": "# Copyright 2014 Google 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.\n\nimport io\n\nfrom setuptools import find_packages\nfrom setuptools import setup\n\n\nDEPENDENCIES = (\n    \"cachetools>=2.0.0,<5.0\",\n    \"pyasn1-modules>=0.2.1\",\n    # rsa==4.5 is the last version to support 2.7\n    # https://github.com/sybrenstuvel/python-rsa/issues/152#issuecomment-643470233\n    'rsa<4.6; python_version < \"3.5\"',\n    'rsa>=3.1.4,<5; python_version >= \"3.5\"',\n    \"setuptools>=40.3.0\",\n    \"six>=1.9.0\",\n)\n\nextras = {\"aiohttp\": \"aiohttp >= 3.6.2, < 4.0.0dev; python_version>='3.6'\"}\n\nwith io.open(\"README.rst\", \"r\") as fh:\n    long_description = fh.read()\n\nversion = \"1.22.0\"\n\nsetup(\n    name=\"google-auth\",\n    version=version,\n    author=\"Google Cloud Platform\",\n    author_email=\"googleapis-packages@google.com\",\n    description=\"Google Authentication Library\",\n    long_description=long_description,\n    url=\"https://github.com/googleapis/google-auth-library-python\",\n    packages=find_packages(exclude=(\"tests*\", \"system_tests*\")),\n    namespace_packages=(\"google\",),\n    install_requires=DEPENDENCIES,\n    extras_require=extras,\n    python_requires=\">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*\",\n    license=\"Apache 2.0\",\n    keywords=\"google auth oauth client\",\n    classifiers=[\n        \"Programming Language :: Python :: 2\",\n        \"Programming Language :: Python :: 2.7\",\n        \"Programming Language :: Python :: 3\",\n        \"Programming Language :: Python :: 3.5\",\n        \"Programming Language :: Python :: 3.6\",\n        \"Programming Language :: Python :: 3.7\",\n        \"Programming Language :: Python :: 3.8\",\n        \"Development Status :: 5 - Production/Stable\",\n        \"Intended Audience :: Developers\",\n        \"License :: OSI Approved :: Apache Software License\",\n        \"Operating System :: POSIX\",\n        \"Operating System :: Microsoft :: Windows\",\n        \"Operating System :: MacOS :: MacOS X\",\n        \"Operating System :: OS Independent\",\n        \"Topic :: Internet :: WWW/HTTP\",\n    ],\n)\n", "path": "setup.py"}]}