prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Error on using hvd.mpi_threads_supported()  error: undefined symbol: mpi_threads_supported
  Error on using hvd.mpi_threads_supported() 
  
  error: undefined symbol: mpi_threads_supported
  
  `mpi_threads_supported = MPI_COMMON_LIB_CTYPES.mpi_threads_supported()`
   should be 
  `mpi_threads_supported = MPI_COMMON_LIB_CTYPES.horovod_mpi_threads_supported()`
  
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `horovod/common/__init__.py`
  Content:
  ```
  1 # Copyright 2016 The TensorFlow Authors. All Rights Reserved.
  2 # Modifications copyright (C) 2018 Uber Technologies, Inc.
  3 #
  4 # Licensed under the Apache License, Version 2.0 (the "License");
  5 # you may not use this file except in compliance with the License.
  6 # You may obtain a copy of the License at
  7 #
  8 #     http://www.apache.org/licenses/LICENSE-2.0
  9 #
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS,
  12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15 # =============================================================================
  16 
  17 import ctypes
  18 import os
  19 import sysconfig
  20 
  21 
  22 def get_ext_suffix():
  23     """Determine library extension for various versions of Python."""
  24     ext_suffix = sysconfig.get_config_var('EXT_SUFFIX')
  25     if ext_suffix:
  26         return ext_suffix
  27 
  28     ext_suffix = sysconfig.get_config_var('SO')
  29     if ext_suffix:
  30         return ext_suffix
  31 
  32     return '.so'
  33 
  34 
  35 MPI_COMMON_LIB_CTYPES = \
  36     ctypes.CDLL(os.path.join(os.path.dirname(__file__),
  37                              'mpi_lib' + get_ext_suffix()), mode=ctypes.RTLD_GLOBAL)
  38 
  39 
  40 def init():
  41     """A function that initializes Horovod.
  42     """
  43     return MPI_COMMON_LIB_CTYPES.horovod_init()
  44 
  45 
  46 def size():
  47     """A function that returns the number of Horovod processes.
  48 
  49     Returns:
  50       An integer scalar containing the number of Horovod processes.
  51     """
  52     size = MPI_COMMON_LIB_CTYPES.horovod_size()
  53     if size == -1:
  54         raise ValueError(
  55             'Horovod has not been initialized; use hvd.init().')
  56     return size
  57 
  58 
  59 def local_size():
  60     """A function that returns the number of Horovod processes within the
  61     node the current process is running on.
  62 
  63     Returns:
  64       An integer scalar containing the number of local Horovod processes.
  65     """
  66     local_size = MPI_COMMON_LIB_CTYPES.horovod_local_size()
  67     if local_size == -1:
  68         raise ValueError(
  69             'Horovod has not been initialized; use hvd.init().')
  70     return local_size
  71 
  72 
  73 def rank():
  74     """A function that returns the Horovod rank of the calling process.
  75 
  76     Returns:
  77       An integer scalar with the Horovod rank of the calling process.
  78     """
  79     rank = MPI_COMMON_LIB_CTYPES.horovod_rank()
  80     if rank == -1:
  81         raise ValueError(
  82             'Horovod has not been initialized; use hvd.init().')
  83     return rank
  84 
  85 
  86 def local_rank():
  87     """A function that returns the local Horovod rank of the calling process, within the
  88     node that it is running on. For example, if there are seven processes running
  89     on a node, their local ranks will be zero through six, inclusive.
  90 
  91     Returns:
  92       An integer scalar with the local Horovod rank of the calling process.
  93     """
  94     local_rank = MPI_COMMON_LIB_CTYPES.horovod_local_rank()
  95     if local_rank == -1:
  96         raise ValueError(
  97             'Horovod has not been initialized; use hvd.init().')
  98     return local_rank
  99 
  100 
  101 def mpi_threads_supported():
  102     """A function that returns a flag indicating whether MPI multi-threading is supported.
  103 
  104     If MPI multi-threading is supported, users may mix and match Horovod usage with other
  105     MPI libraries, such as `mpi4py`.
  106 
  107     Returns:
  108       A boolean value indicating whether MPI multi-threading is supported.
  109     """
  110     mpi_threads_supported = MPI_COMMON_LIB_CTYPES.mpi_threads_supported()
  111     if mpi_threads_supported == -1:
  112         raise ValueError(
  113             'Horovod has not been initialized; use hvd.init().')
  114     return bool(mpi_threads_supported)
  115
  ```
  --- 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/horovod/common/__init__.py b/horovod/common/__init__.py
  --- a/horovod/common/__init__.py
  +++ b/horovod/common/__init__.py
  @@ -107,7 +107,7 @@
       Returns:
         A boolean value indicating whether MPI multi-threading is supported.
       """
  -    mpi_threads_supported = MPI_COMMON_LIB_CTYPES.mpi_threads_supported()
  +    mpi_threads_supported = MPI_COMMON_LIB_CTYPES.horovod_mpi_threads_supported()
       if mpi_threads_supported == -1:
           raise ValueError(
               'Horovod has not been initialized; use hvd.init().')
  
verification_info: {"golden_diff": "diff --git a/horovod/common/__init__.py b/horovod/common/__init__.py\n--- a/horovod/common/__init__.py\n+++ b/horovod/common/__init__.py\n@@ -107,7 +107,7 @@\n     Returns:\n       A boolean value indicating whether MPI multi-threading is supported.\n     \"\"\"\n-    mpi_threads_supported = MPI_COMMON_LIB_CTYPES.mpi_threads_supported()\n+    mpi_threads_supported = MPI_COMMON_LIB_CTYPES.horovod_mpi_threads_supported()\n     if mpi_threads_supported == -1:\n         raise ValueError(\n             'Horovod has not been initialized; use hvd.init().')\n", "issue": "Error on using hvd.mpi_threads_supported()  error: undefined symbol: mpi_threads_supported\nError on using hvd.mpi_threads_supported() \r\n\r\nerror: undefined symbol: mpi_threads_supported\r\n\r\n`mpi_threads_supported = MPI_COMMON_LIB_CTYPES.mpi_threads_supported()`\r\n should be \r\n`mpi_threads_supported = MPI_COMMON_LIB_CTYPES.horovod_mpi_threads_supported()`\r\n\n", "before_files": [{"content": "# Copyright 2016 The TensorFlow Authors. All Rights Reserved.\n# Modifications copyright (C) 2018 Uber 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.\n# =============================================================================\n\nimport ctypes\nimport os\nimport sysconfig\n\n\ndef get_ext_suffix():\n    \"\"\"Determine library extension for various versions of Python.\"\"\"\n    ext_suffix = sysconfig.get_config_var('EXT_SUFFIX')\n    if ext_suffix:\n        return ext_suffix\n\n    ext_suffix = sysconfig.get_config_var('SO')\n    if ext_suffix:\n        return ext_suffix\n\n    return '.so'\n\n\nMPI_COMMON_LIB_CTYPES = \\\n    ctypes.CDLL(os.path.join(os.path.dirname(__file__),\n                             'mpi_lib' + get_ext_suffix()), mode=ctypes.RTLD_GLOBAL)\n\n\ndef init():\n    \"\"\"A function that initializes Horovod.\n    \"\"\"\n    return MPI_COMMON_LIB_CTYPES.horovod_init()\n\n\ndef size():\n    \"\"\"A function that returns the number of Horovod processes.\n\n    Returns:\n      An integer scalar containing the number of Horovod processes.\n    \"\"\"\n    size = MPI_COMMON_LIB_CTYPES.horovod_size()\n    if size == -1:\n        raise ValueError(\n            'Horovod has not been initialized; use hvd.init().')\n    return size\n\n\ndef local_size():\n    \"\"\"A function that returns the number of Horovod processes within the\n    node the current process is running on.\n\n    Returns:\n      An integer scalar containing the number of local Horovod processes.\n    \"\"\"\n    local_size = MPI_COMMON_LIB_CTYPES.horovod_local_size()\n    if local_size == -1:\n        raise ValueError(\n            'Horovod has not been initialized; use hvd.init().')\n    return local_size\n\n\ndef rank():\n    \"\"\"A function that returns the Horovod rank of the calling process.\n\n    Returns:\n      An integer scalar with the Horovod rank of the calling process.\n    \"\"\"\n    rank = MPI_COMMON_LIB_CTYPES.horovod_rank()\n    if rank == -1:\n        raise ValueError(\n            'Horovod has not been initialized; use hvd.init().')\n    return rank\n\n\ndef local_rank():\n    \"\"\"A function that returns the local Horovod rank of the calling process, within the\n    node that it is running on. For example, if there are seven processes running\n    on a node, their local ranks will be zero through six, inclusive.\n\n    Returns:\n      An integer scalar with the local Horovod rank of the calling process.\n    \"\"\"\n    local_rank = MPI_COMMON_LIB_CTYPES.horovod_local_rank()\n    if local_rank == -1:\n        raise ValueError(\n            'Horovod has not been initialized; use hvd.init().')\n    return local_rank\n\n\ndef mpi_threads_supported():\n    \"\"\"A function that returns a flag indicating whether MPI multi-threading is supported.\n\n    If MPI multi-threading is supported, users may mix and match Horovod usage with other\n    MPI libraries, such as `mpi4py`.\n\n    Returns:\n      A boolean value indicating whether MPI multi-threading is supported.\n    \"\"\"\n    mpi_threads_supported = MPI_COMMON_LIB_CTYPES.mpi_threads_supported()\n    if mpi_threads_supported == -1:\n        raise ValueError(\n            'Horovod has not been initialized; use hvd.init().')\n    return bool(mpi_threads_supported)\n", "path": "horovod/common/__init__.py"}], "after_files": [{"content": "# Copyright 2016 The TensorFlow Authors. All Rights Reserved.\n# Modifications copyright (C) 2018 Uber 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.\n# =============================================================================\n\nimport ctypes\nimport os\nimport sysconfig\n\n\ndef get_ext_suffix():\n    \"\"\"Determine library extension for various versions of Python.\"\"\"\n    ext_suffix = sysconfig.get_config_var('EXT_SUFFIX')\n    if ext_suffix:\n        return ext_suffix\n\n    ext_suffix = sysconfig.get_config_var('SO')\n    if ext_suffix:\n        return ext_suffix\n\n    return '.so'\n\n\nMPI_COMMON_LIB_CTYPES = \\\n    ctypes.CDLL(os.path.join(os.path.dirname(__file__),\n                             'mpi_lib' + get_ext_suffix()), mode=ctypes.RTLD_GLOBAL)\n\n\ndef init():\n    \"\"\"A function that initializes Horovod.\n    \"\"\"\n    return MPI_COMMON_LIB_CTYPES.horovod_init()\n\n\ndef size():\n    \"\"\"A function that returns the number of Horovod processes.\n\n    Returns:\n      An integer scalar containing the number of Horovod processes.\n    \"\"\"\n    size = MPI_COMMON_LIB_CTYPES.horovod_size()\n    if size == -1:\n        raise ValueError(\n            'Horovod has not been initialized; use hvd.init().')\n    return size\n\n\ndef local_size():\n    \"\"\"A function that returns the number of Horovod processes within the\n    node the current process is running on.\n\n    Returns:\n      An integer scalar containing the number of local Horovod processes.\n    \"\"\"\n    local_size = MPI_COMMON_LIB_CTYPES.horovod_local_size()\n    if local_size == -1:\n        raise ValueError(\n            'Horovod has not been initialized; use hvd.init().')\n    return local_size\n\n\ndef rank():\n    \"\"\"A function that returns the Horovod rank of the calling process.\n\n    Returns:\n      An integer scalar with the Horovod rank of the calling process.\n    \"\"\"\n    rank = MPI_COMMON_LIB_CTYPES.horovod_rank()\n    if rank == -1:\n        raise ValueError(\n            'Horovod has not been initialized; use hvd.init().')\n    return rank\n\n\ndef local_rank():\n    \"\"\"A function that returns the local Horovod rank of the calling process, within the\n    node that it is running on. For example, if there are seven processes running\n    on a node, their local ranks will be zero through six, inclusive.\n\n    Returns:\n      An integer scalar with the local Horovod rank of the calling process.\n    \"\"\"\n    local_rank = MPI_COMMON_LIB_CTYPES.horovod_local_rank()\n    if local_rank == -1:\n        raise ValueError(\n            'Horovod has not been initialized; use hvd.init().')\n    return local_rank\n\n\ndef mpi_threads_supported():\n    \"\"\"A function that returns a flag indicating whether MPI multi-threading is supported.\n\n    If MPI multi-threading is supported, users may mix and match Horovod usage with other\n    MPI libraries, such as `mpi4py`.\n\n    Returns:\n      A boolean value indicating whether MPI multi-threading is supported.\n    \"\"\"\n    mpi_threads_supported = MPI_COMMON_LIB_CTYPES.horovod_mpi_threads_supported()\n    if mpi_threads_supported == -1:\n        raise ValueError(\n            'Horovod has not been initialized; use hvd.init().')\n    return bool(mpi_threads_supported)\n", "path": "horovod/common/__init__.py"}]}