We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Cirq should ship a py.typed file
[PEP 561](https://www.python.org/dev/peps/pep-0561/) says that any packages that ship with type information should have a py.typed file in their package. Otherwise, type checkers like mypy can't find Cirq. (FWIW I just did `touch ~/.virtualenvs/.../cirq/py.typed`, and then mypy type-checks the file correctly.)

Other than that, Cirq seems pretty awesome so far :ok_hand:.
Cirq should ship a py.typed file
[PEP 561](https://www.python.org/dev/peps/pep-0561/) says that any packages that ship with type information should have a py.typed file in their package. Otherwise, type checkers like mypy can't find Cirq. (FWIW I just did `touch ~/.virtualenvs/.../cirq/py.typed`, and then mypy type-checks the file correctly.)

Other than that, Cirq seems pretty awesome so far :ok_hand:.

--- 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 2018 The Cirq Developers
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 #     https://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 import os
17 from setuptools import find_packages, setup
18 
19 # This reads the __version__ variable from cirq/_version.py
20 __version__ = ''
21 exec(open('cirq/_version.py').read())
22 
23 name = 'cirq'
24 
25 description = ('A framework for creating, editing, and invoking '
26                'Noisy Intermediate Scale Quantum (NISQ) circuits.')
27 
28 # README file as long_description.
29 long_description = io.open('README.rst', encoding='utf-8').read()
30 
31 # If CIRQ_DEV_VERSION is set then we use cirq-dev as the name of the package
32 # and update the version to this value.
33 if 'CIRQ_DEV_VERSION' in os.environ:
34     name = 'cirq-dev'
35     __version__ = os.environ['CIRQ_DEV_VERSION']
36     long_description = (
37         "**This is a development version of Cirq and may be "
38         "unstable.**\n\n**For the latest stable release of Cirq "
39         "see**\n`here <https://pypi.org/project/cirq>`__.\n\n" +
40         long_description)
41 
42 # Read in requirements
43 requirements = open('requirements.txt').readlines()
44 requirements = [r.strip() for r in requirements]
45 contrib_requirements = open('cirq/contrib/contrib-requirements.txt').readlines()
46 contrib_requirements = [r.strip() for r in contrib_requirements]
47 dev_requirements = open('dev_tools/conf/pip-list-dev-tools.txt').readlines()
48 dev_requirements = [r.strip() for r in dev_requirements]
49 
50 cirq_packages = ['cirq'] + [
51     'cirq.' + package for package in find_packages(where='cirq')
52 ]
53 
54 # Sanity check
55 assert __version__, 'Version string cannot be empty'
56 
57 setup(name=name,
58       version=__version__,
59       url='http://github.com/quantumlib/cirq',
60       author='The Cirq Developers',
61       author_email='cirq@googlegroups.com',
62       python_requires=('>=3.6.0'),
63       install_requires=requirements,
64       extras_require={
65           'contrib': contrib_requirements,
66           'dev_env': dev_requirements + contrib_requirements,
67       },
68       license='Apache 2',
69       description=description,
70       long_description=long_description,
71       packages=cirq_packages,
72       package_data={
73           'cirq.api.google.v1': ['*.proto'],
74           'cirq.api.google.v2': ['*.proto'],
75           'cirq.google.api.v1': ['*.proto'],
76           'cirq.google.api.v2': ['*.proto'],
77       })
78
```
--- 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
@@ -70,6 +70,7 @@
       long_description=long_description,
       packages=cirq_packages,
       package_data={
+          'cirq': ['py.typed'],
           'cirq.api.google.v1': ['*.proto'],
           'cirq.api.google.v2': ['*.proto'],
           'cirq.google.api.v1': ['*.proto'],

{"golden_diff": "diff --git a/setup.py b/setup.py\n--- a/setup.py\n+++ b/setup.py\n@@ -70,6 +70,7 @@\n       long_description=long_description,\n       packages=cirq_packages,\n       package_data={\n+          'cirq': ['py.typed'],\n           'cirq.api.google.v1': ['*.proto'],\n           'cirq.api.google.v2': ['*.proto'],\n           'cirq.google.api.v1': ['*.proto'],\n", "issue": "Cirq should ship a py.typed file\n[PEP 561](https://www.python.org/dev/peps/pep-0561/) says that any packages that ship with type information should have a py.typed file in their package. Otherwise, type checkers like mypy can't find Cirq. (FWIW I just did `touch ~/.virtualenvs/.../cirq/py.typed`, and then mypy type-checks the file correctly.)\r\n\r\nOther than that, Cirq seems pretty awesome so far :ok_hand:.\nCirq should ship a py.typed file\n[PEP 561](https://www.python.org/dev/peps/pep-0561/) says that any packages that ship with type information should have a py.typed file in their package. Otherwise, type checkers like mypy can't find Cirq. (FWIW I just did `touch ~/.virtualenvs/.../cirq/py.typed`, and then mypy type-checks the file correctly.)\r\n\r\nOther than that, Cirq seems pretty awesome so far :ok_hand:.\n", "before_files": [{"content": "# Copyright 2018 The Cirq Developers\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#     https://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\nimport os\nfrom setuptools import find_packages, setup\n\n# This reads the __version__ variable from cirq/_version.py\n__version__ = ''\nexec(open('cirq/_version.py').read())\n\nname = 'cirq'\n\ndescription = ('A framework for creating, editing, and invoking '\n               'Noisy Intermediate Scale Quantum (NISQ) circuits.')\n\n# README file as long_description.\nlong_description = io.open('README.rst', encoding='utf-8').read()\n\n# If CIRQ_DEV_VERSION is set then we use cirq-dev as the name of the package\n# and update the version to this value.\nif 'CIRQ_DEV_VERSION' in os.environ:\n    name = 'cirq-dev'\n    __version__ = os.environ['CIRQ_DEV_VERSION']\n    long_description = (\n        \"**This is a development version of Cirq and may be \"\n        \"unstable.**\\n\\n**For the latest stable release of Cirq \"\n        \"see**\\n`here <https://pypi.org/project/cirq>`__.\\n\\n\" +\n        long_description)\n\n# Read in requirements\nrequirements = open('requirements.txt').readlines()\nrequirements = [r.strip() for r in requirements]\ncontrib_requirements = open('cirq/contrib/contrib-requirements.txt').readlines()\ncontrib_requirements = [r.strip() for r in contrib_requirements]\ndev_requirements = open('dev_tools/conf/pip-list-dev-tools.txt').readlines()\ndev_requirements = [r.strip() for r in dev_requirements]\n\ncirq_packages = ['cirq'] + [\n    'cirq.' + package for package in find_packages(where='cirq')\n]\n\n# Sanity check\nassert __version__, 'Version string cannot be empty'\n\nsetup(name=name,\n      version=__version__,\n      url='http://github.com/quantumlib/cirq',\n      author='The Cirq Developers',\n      author_email='cirq@googlegroups.com',\n      python_requires=('>=3.6.0'),\n      install_requires=requirements,\n      extras_require={\n          'contrib': contrib_requirements,\n          'dev_env': dev_requirements + contrib_requirements,\n      },\n      license='Apache 2',\n      description=description,\n      long_description=long_description,\n      packages=cirq_packages,\n      package_data={\n          'cirq.api.google.v1': ['*.proto'],\n          'cirq.api.google.v2': ['*.proto'],\n          'cirq.google.api.v1': ['*.proto'],\n          'cirq.google.api.v2': ['*.proto'],\n      })\n", "path": "setup.py"}], "after_files": [{"content": "# Copyright 2018 The Cirq Developers\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#     https://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\nimport os\nfrom setuptools import find_packages, setup\n\n# This reads the __version__ variable from cirq/_version.py\n__version__ = ''\nexec(open('cirq/_version.py').read())\n\nname = 'cirq'\n\ndescription = ('A framework for creating, editing, and invoking '\n               'Noisy Intermediate Scale Quantum (NISQ) circuits.')\n\n# README file as long_description.\nlong_description = io.open('README.rst', encoding='utf-8').read()\n\n# If CIRQ_DEV_VERSION is set then we use cirq-dev as the name of the package\n# and update the version to this value.\nif 'CIRQ_DEV_VERSION' in os.environ:\n    name = 'cirq-dev'\n    __version__ = os.environ['CIRQ_DEV_VERSION']\n    long_description = (\n        \"**This is a development version of Cirq and may be \"\n        \"unstable.**\\n\\n**For the latest stable release of Cirq \"\n        \"see**\\n`here <https://pypi.org/project/cirq>`__.\\n\\n\" +\n        long_description)\n\n# Read in requirements\nrequirements = open('requirements.txt').readlines()\nrequirements = [r.strip() for r in requirements]\ncontrib_requirements = open('cirq/contrib/contrib-requirements.txt').readlines()\ncontrib_requirements = [r.strip() for r in contrib_requirements]\ndev_requirements = open('dev_tools/conf/pip-list-dev-tools.txt').readlines()\ndev_requirements = [r.strip() for r in dev_requirements]\n\ncirq_packages = ['cirq'] + [\n    'cirq.' + package for package in find_packages(where='cirq')\n]\n\n# Sanity check\nassert __version__, 'Version string cannot be empty'\n\nsetup(name=name,\n      version=__version__,\n      url='http://github.com/quantumlib/cirq',\n      author='The Cirq Developers',\n      author_email='cirq@googlegroups.com',\n      python_requires=('>=3.6.0'),\n      install_requires=requirements,\n      extras_require={\n          'contrib': contrib_requirements,\n          'dev_env': dev_requirements + contrib_requirements,\n      },\n      license='Apache 2',\n      description=description,\n      long_description=long_description,\n      packages=cirq_packages,\n      package_data={\n          'cirq': ['py.typed'],\n          'cirq.api.google.v1': ['*.proto'],\n          'cirq.api.google.v2': ['*.proto'],\n          'cirq.google.api.v1': ['*.proto'],\n          'cirq.google.api.v2': ['*.proto'],\n      })\n", "path": "setup.py"}]}