[CI/Build] Remove imports of built-in `re` (#18750)

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

.pre-commit-config.yaml

@@ -142,6 +142,7 @@ repos:
     language: python
     types: [python]
     pass_filenames: false
+    additional_dependencies: [regex]
   # Keep `suggestion` last
   - id: suggestion
     name: Suggestion

docs/mkdocs/hooks/generate_examples.py

 # SPDX-License-Identifier: Apache-2.0
-
 import itertools
-import re
 from dataclasses import dataclass, field
 from pathlib import Path
 from typing import Literal
 
+import regex as re
+
 ROOT_DIR = Path(__file__).parent.parent.parent.parent
 ROOT_DIR_RELATIVE = '../../../../..'
 EXAMPLE_DIR = ROOT_DIR / "examples"

docs/mkdocs/hooks/url_schemes.py

 # SPDX-License-Identifier: Apache-2.0
-import re
-
+import regex as re
 from mkdocs.config.defaults import MkDocsConfig
 from mkdocs.structure.files import Files
 from mkdocs.structure.pages import Page

requirements/docs.txt

@@ -5,4 +5,5 @@ mkdocstrings-python
 mkdocs-gen-files
 mkdocs-awesome-nav
 python-markdown-math
+regex
 ruff

tools/check_triton_import.py

 # SPDX-License-Identifier: Apache-2.0
-import re
 import subprocess
 import sys
 
+import regex as re
+
 FORBIDDEN_IMPORT_RE = re.compile(r"^(from|import)\s+triton(\s|\.|$)")
 
 # the way allowed to import triton

vllm/entrypoints/openai/tool_parsers/llama4_pythonic_tool_parser.py

 # SPDX-License-Identifier: Apache-2.0
-
 import ast
 import json
-import re
 from collections.abc import Sequence
 from typing import Any, Union
 
+import regex as re
 from transformers import PreTrainedTokenizerBase
 
 from vllm.entrypoints.openai.protocol import (ChatCompletionRequest,

vllm/model_executor/guided_decoding/guidance_decoding.py

 # SPDX-License-Identifier: Apache-2.0
 import json
-from re import escape as regex_escape
 
 import llguidance
+from regex import escape as regex_escape
 from transformers import PreTrainedTokenizerBase
 
 from vllm.model_executor.guided_decoding.guidance_logits_processors import (

vllm/model_executor/guided_decoding/outlines_decoding.py

@@ -5,9 +5,9 @@ import concurrent.futures
 import os
 from enum import Enum
 from json import dumps as json_dumps
-from re import escape as regex_escape
 from typing import Optional, Union
 
+from regex import escape as regex_escape
 from transformers import PreTrainedTokenizerBase
 
 from vllm.model_executor.guided_decoding.outlines_logits_processors import (