prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  CI failing: `./tools/configen/configen/utils.py:4:1: F401 'typing.Tuple' imported but unused`
  ```
  ./tools/configen/configen/utils.py:4:1: F401 'typing.Tuple' imported but unused
  nox > [2023-07-24 22:16:52,631] Command flake8 --config .flake8 failed with exit code 1
  nox > [2023-07-24 22:16:52,632] Session lint-3.10 failed.
  ```
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `tools/configen/configen/utils.py`
  Content:
  ```
  1 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved
  2 import sys
  3 from enum import Enum
  4 from typing import Any, Dict, Iterable, List, Optional, Set, Tuple
  5 
  6 from omegaconf._utils import (
  7     _resolve_optional,
  8     get_dict_key_value_types,
  9     get_list_element_type,
  10     is_dict_annotation,
  11     is_list_annotation,
  12     is_primitive_type_annotation,
  13 )
  14 
  15 
  16 # borrowed from OmegaConf
  17 def type_str(t: Any) -> str:
  18     is_optional, t = _resolve_optional(t)
  19     if t is None:
  20         return type(t).__name__
  21     if t is Any:
  22         return "Any"
  23     if t is ...:
  24         return "..."
  25 
  26     if sys.version_info < (3, 7, 0):  # pragma: no cover
  27         # Python 3.6
  28         if hasattr(t, "__name__"):
  29             name = str(t.__name__)
  30         else:
  31             if t.__origin__ is not None:
  32                 name = type_str(t.__origin__)
  33             else:
  34                 name = str(t)
  35                 if name.startswith("typing."):
  36                     name = name[len("typing.") :]
  37     else:  # pragma: no cover
  38         # Python >= 3.7
  39         if hasattr(t, "__name__"):
  40             name = str(t.__name__)
  41         else:
  42             if t._name is None:
  43                 if t.__origin__ is not None:
  44                     name = type_str(t.__origin__)
  45             else:
  46                 name = str(t._name)
  47 
  48     args = getattr(t, "__args__", None)
  49     if args is not None:
  50         args = ", ".join(type_str(t) for t in t.__args__)
  51         ret = f"{name}[{args}]"
  52     else:
  53         ret = name
  54     if is_optional:
  55         return f"Optional[{ret}]"
  56     else:
  57         return ret
  58 
  59 
  60 def is_tuple_annotation(type_: Any) -> bool:
  61     origin = getattr(type_, "__origin__", None)
  62     return origin is tuple
  63 
  64 
  65 def convert_imports(imports: Set[Any], string_imports: Iterable[str]) -> List[str]:
  66     tmp = set()
  67     for imp in string_imports:
  68         tmp.add(imp)
  69     for t in imports:
  70         s = None
  71         origin = getattr(t, "__origin__", None)
  72         if t is Any:
  73             classname = "Any"
  74         elif t is Optional:
  75             classname = "Optional"
  76         else:
  77             if origin is list:
  78                 classname = "List"
  79             elif origin is tuple:
  80                 classname = "Tuple"
  81             elif origin is dict:
  82                 classname = "Dict"
  83             else:
  84                 classname = t.__name__
  85 
  86         if not is_primitive_type_annotation(t) or issubclass(t, Enum):
  87             s = f"from {t.__module__} import {classname}"
  88 
  89         if s is not None:
  90             tmp.add(s)
  91     return sorted(list(tmp))
  92 
  93 
  94 def collect_imports(imports: Set[Any], type_: Any) -> None:
  95     if is_list_annotation(type_):
  96         collect_imports(imports, get_list_element_type(type_))
  97         type_ = List
  98     elif is_dict_annotation(type_):
  99         kvt = get_dict_key_value_types(type_)
  100         collect_imports(imports, kvt[0])
  101         collect_imports(imports, kvt[1])
  102         type_ = Dict
  103     else:
  104         is_optional = _resolve_optional(type_)[0]
  105         if is_optional and type_ is not Any:
  106             type_ = Optional
  107     imports.add(type_)
  108
  ```
  --- 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/tools/configen/configen/utils.py b/tools/configen/configen/utils.py
  --- a/tools/configen/configen/utils.py
  +++ b/tools/configen/configen/utils.py
  @@ -1,7 +1,7 @@
   # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved
   import sys
   from enum import Enum
  -from typing import Any, Dict, Iterable, List, Optional, Set, Tuple
  +from typing import Any, Dict, Iterable, List, Optional, Set
   
   from omegaconf._utils import (
       _resolve_optional,
  
verification_info: {"golden_diff": "diff --git a/tools/configen/configen/utils.py b/tools/configen/configen/utils.py\n--- a/tools/configen/configen/utils.py\n+++ b/tools/configen/configen/utils.py\n@@ -1,7 +1,7 @@\n # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved\n import sys\n from enum import Enum\n-from typing import Any, Dict, Iterable, List, Optional, Set, Tuple\n+from typing import Any, Dict, Iterable, List, Optional, Set\n \n from omegaconf._utils import (\n     _resolve_optional,\n", "issue": "CI failing: `./tools/configen/configen/utils.py:4:1: F401 'typing.Tuple' imported but unused`\n```\r\n./tools/configen/configen/utils.py:4:1: F401 'typing.Tuple' imported but unused\r\nnox > [2023-07-24 22:16:52,631] Command flake8 --config .flake8 failed with exit code 1\r\nnox > [2023-07-24 22:16:52,632] Session lint-3.10 failed.\r\n```\n", "before_files": [{"content": "# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved\nimport sys\nfrom enum import Enum\nfrom typing import Any, Dict, Iterable, List, Optional, Set, Tuple\n\nfrom omegaconf._utils import (\n    _resolve_optional,\n    get_dict_key_value_types,\n    get_list_element_type,\n    is_dict_annotation,\n    is_list_annotation,\n    is_primitive_type_annotation,\n)\n\n\n# borrowed from OmegaConf\ndef type_str(t: Any) -> str:\n    is_optional, t = _resolve_optional(t)\n    if t is None:\n        return type(t).__name__\n    if t is Any:\n        return \"Any\"\n    if t is ...:\n        return \"...\"\n\n    if sys.version_info < (3, 7, 0):  # pragma: no cover\n        # Python 3.6\n        if hasattr(t, \"__name__\"):\n            name = str(t.__name__)\n        else:\n            if t.__origin__ is not None:\n                name = type_str(t.__origin__)\n            else:\n                name = str(t)\n                if name.startswith(\"typing.\"):\n                    name = name[len(\"typing.\") :]\n    else:  # pragma: no cover\n        # Python >= 3.7\n        if hasattr(t, \"__name__\"):\n            name = str(t.__name__)\n        else:\n            if t._name is None:\n                if t.__origin__ is not None:\n                    name = type_str(t.__origin__)\n            else:\n                name = str(t._name)\n\n    args = getattr(t, \"__args__\", None)\n    if args is not None:\n        args = \", \".join(type_str(t) for t in t.__args__)\n        ret = f\"{name}[{args}]\"\n    else:\n        ret = name\n    if is_optional:\n        return f\"Optional[{ret}]\"\n    else:\n        return ret\n\n\ndef is_tuple_annotation(type_: Any) -> bool:\n    origin = getattr(type_, \"__origin__\", None)\n    return origin is tuple\n\n\ndef convert_imports(imports: Set[Any], string_imports: Iterable[str]) -> List[str]:\n    tmp = set()\n    for imp in string_imports:\n        tmp.add(imp)\n    for t in imports:\n        s = None\n        origin = getattr(t, \"__origin__\", None)\n        if t is Any:\n            classname = \"Any\"\n        elif t is Optional:\n            classname = \"Optional\"\n        else:\n            if origin is list:\n                classname = \"List\"\n            elif origin is tuple:\n                classname = \"Tuple\"\n            elif origin is dict:\n                classname = \"Dict\"\n            else:\n                classname = t.__name__\n\n        if not is_primitive_type_annotation(t) or issubclass(t, Enum):\n            s = f\"from {t.__module__} import {classname}\"\n\n        if s is not None:\n            tmp.add(s)\n    return sorted(list(tmp))\n\n\ndef collect_imports(imports: Set[Any], type_: Any) -> None:\n    if is_list_annotation(type_):\n        collect_imports(imports, get_list_element_type(type_))\n        type_ = List\n    elif is_dict_annotation(type_):\n        kvt = get_dict_key_value_types(type_)\n        collect_imports(imports, kvt[0])\n        collect_imports(imports, kvt[1])\n        type_ = Dict\n    else:\n        is_optional = _resolve_optional(type_)[0]\n        if is_optional and type_ is not Any:\n            type_ = Optional\n    imports.add(type_)\n", "path": "tools/configen/configen/utils.py"}], "after_files": [{"content": "# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved\nimport sys\nfrom enum import Enum\nfrom typing import Any, Dict, Iterable, List, Optional, Set\n\nfrom omegaconf._utils import (\n    _resolve_optional,\n    get_dict_key_value_types,\n    get_list_element_type,\n    is_dict_annotation,\n    is_list_annotation,\n    is_primitive_type_annotation,\n)\n\n\n# borrowed from OmegaConf\ndef type_str(t: Any) -> str:\n    is_optional, t = _resolve_optional(t)\n    if t is None:\n        return type(t).__name__\n    if t is Any:\n        return \"Any\"\n    if t is ...:\n        return \"...\"\n\n    if sys.version_info < (3, 7, 0):  # pragma: no cover\n        # Python 3.6\n        if hasattr(t, \"__name__\"):\n            name = str(t.__name__)\n        else:\n            if t.__origin__ is not None:\n                name = type_str(t.__origin__)\n            else:\n                name = str(t)\n                if name.startswith(\"typing.\"):\n                    name = name[len(\"typing.\") :]\n    else:  # pragma: no cover\n        # Python >= 3.7\n        if hasattr(t, \"__name__\"):\n            name = str(t.__name__)\n        else:\n            if t._name is None:\n                if t.__origin__ is not None:\n                    name = type_str(t.__origin__)\n            else:\n                name = str(t._name)\n\n    args = getattr(t, \"__args__\", None)\n    if args is not None:\n        args = \", \".join(type_str(t) for t in t.__args__)\n        ret = f\"{name}[{args}]\"\n    else:\n        ret = name\n    if is_optional:\n        return f\"Optional[{ret}]\"\n    else:\n        return ret\n\n\ndef is_tuple_annotation(type_: Any) -> bool:\n    origin = getattr(type_, \"__origin__\", None)\n    return origin is tuple\n\n\ndef convert_imports(imports: Set[Any], string_imports: Iterable[str]) -> List[str]:\n    tmp = set()\n    for imp in string_imports:\n        tmp.add(imp)\n    for t in imports:\n        s = None\n        origin = getattr(t, \"__origin__\", None)\n        if t is Any:\n            classname = \"Any\"\n        elif t is Optional:\n            classname = \"Optional\"\n        else:\n            if origin is list:\n                classname = \"List\"\n            elif origin is tuple:\n                classname = \"Tuple\"\n            elif origin is dict:\n                classname = \"Dict\"\n            else:\n                classname = t.__name__\n\n        if not is_primitive_type_annotation(t) or issubclass(t, Enum):\n            s = f\"from {t.__module__} import {classname}\"\n\n        if s is not None:\n            tmp.add(s)\n    return sorted(list(tmp))\n\n\ndef collect_imports(imports: Set[Any], type_: Any) -> None:\n    if is_list_annotation(type_):\n        collect_imports(imports, get_list_element_type(type_))\n        type_ = List\n    elif is_dict_annotation(type_):\n        kvt = get_dict_key_value_types(type_)\n        collect_imports(imports, kvt[0])\n        collect_imports(imports, kvt[1])\n        type_ = Dict\n    else:\n        is_optional = _resolve_optional(type_)[0]\n        if is_optional and type_ is not Any:\n            type_ = Optional\n    imports.add(type_)\n", "path": "tools/configen/configen/utils.py"}]}