Migrate linter from `pylint` to `ruff` (#1665)

.github/workflows/pylint.yml → .github/workflows/ruff.yml

-name: pylint
+name: ruff
 
 on:
   # Trigger the workflow on push or pull request,
@@ -11,7 +11,7 @@ on:
       - main
 
 jobs:
-  pylint:
+  ruff:
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -25,7 +25,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install pylint==2.8.2
-    - name: Analysing the code with pylint
+        pip install ruff==0.1.5
+    - name: Analysing the code with ruff
       run: |
-        pylint vllm tests
+        ruff vllm tests

.pylintrc

-# This Pylint rcfile contains a best-effort configuration to uphold the
-# best-practices and style described in the Google Python style guide:
-#   https://google.github.io/styleguide/pyguide.html
-#
-# Its canonical open-source location is:
-#   https://google.github.io/styleguide/pylintrc
-
-[MASTER]
-
-# Files or directories to be skipped. They should be base names, not paths.
-ignore=docs
-
-# Files or directories matching the regex patterns are skipped. The regex
-# matches against base names, not paths.
-ignore-patterns=
-
-# Pickle collected data for later comparisons.
-persistent=no
-
-# List of plugins (as comma separated values of python modules names) to load,
-# usually to register additional checkers.
-load-plugins=
-
-# Use multiple processes to speed up Pylint.
-jobs=4
-
-# Allow loading of arbitrary C extensions. Extensions are imported into the
-# active Python interpreter and may run arbitrary code.
-unsafe-load-any-extension=no
-
-
-[MESSAGES CONTROL]
-
-# Only show warnings with the listed confidence levels. Leave empty to show
-# all. Valid levels: HIGH, INFERENCE, INFERENCE_FAILURE, UNDEFINED
-confidence=
-
-# Enable the message, report, category or checker with the given id(s). You can
-# either give multiple identifier separated by comma (,) or put this option
-# multiple time (only on the command line, not in the configuration file where
-# it should appear only once). See also the "--disable" option for examples.
-#enable=
-
-# Disable the message, report, category or checker with the given id(s). You
-# can either give multiple identifiers separated by comma (,) or put this
-# option multiple times (only on the command line, not in the configuration
-# file where it should appear only once).You can also use "--disable=all" to
-# disable everything first and then reenable specific checks. For example, if
-# you want to run only the similarities checker, you can use "--disable=all
-# --enable=similarities". If you want to run only the classes checker, but have
-# no Warning level messages displayed, use"--disable=all --enable=classes
-# --disable=W"
-disable=abstract-method,
-        apply-builtin,
-        arguments-differ,
-        attribute-defined-outside-init,
-        backtick,
-        bad-option-value,
-        basestring-builtin,
-        buffer-builtin,
-        c-extension-no-member,
-        consider-using-enumerate,
-        cmp-builtin,
-        cmp-method,
-        coerce-builtin,
-        coerce-method,
-        delslice-method,
-        div-method,
-        duplicate-code,
-        eq-without-hash,
-        execfile-builtin,
-        file-builtin,
-        filter-builtin-not-iterating,
-        fixme,
-        getslice-method,
-        global-statement,
-        hex-method,
-        idiv-method,
-        implicit-str-concat-in-sequence,
-        import-error,
-        import-self,
-        import-star-module-level,
-        inconsistent-return-statements,
-        input-builtin,
-        intern-builtin,
-        invalid-str-codec,
-        locally-disabled,
-        logging-fstring-interpolation,  # added by vLLM
-        logging-not-lazy,  # added by vLLM
-        long-builtin,
-        long-suffix,
-        map-builtin-not-iterating,
-        misplaced-comparison-constant,
-        missing-class-docstring,  # TODO (vLLM): enable
-        missing-function-docstring,
-        missing-module-docstring,  # TODO (vLLM): enable
-        metaclass-assignment,
-        next-method-called,
-        next-method-defined,
-        no-absolute-import,
-        no-else-break,
-        no-else-continue,
-        no-else-raise,
-        no-else-return,
-        no-init,  # added
-        no-member,
-        no-name-in-module,
-        no-self-use,
-        nonzero-method,
-        oct-method,
-        old-division,
-        old-ne-operator,
-        old-octal-literal,
-        old-raise-syntax,
-        parameter-unpacking,
-        print-statement,
-        raising-string,
-        range-builtin-not-iterating,
-        raw_input-builtin,
-        rdiv-method,
-        reduce-builtin,
-        relative-import,
-        reload-builtin,
-        round-builtin,
-        setslice-method,
-        signature-differs,
-        standarderror-builtin,
-        suppressed-message,
-        sys-max-int,
-        too-few-public-methods,
-        too-many-ancestors,
-        too-many-arguments,
-        too-many-boolean-expressions,
-        too-many-branches,
-        too-many-instance-attributes,
-        too-many-locals,
-        too-many-nested-blocks,
-        too-many-public-methods,
-        too-many-return-statements,
-        too-many-statements,
-        trailing-newlines,
-        unichr-builtin,
-        unicode-builtin,
-        unnecessary-pass,
-        unpacking-in-except,
-        unspecified-encoding,
-        useless-else-on-loop,
-        useless-object-inheritance,
-        useless-suppression,
-        using-cmp-argument,
-        wrong-import-order,
-        xrange-builtin,
-        zip-builtin-not-iterating,
-
-
-[REPORTS]
-
-# Set the output format. Available formats are text, parseable, colorized, msvs
-# (visual studio) and html. You can also give a reporter class, eg
-# mypackage.mymodule.MyReporterClass.
-output-format=text
-
-# Tells whether to display a full report or only the messages
-reports=no
-
-# Python expression which should return a note less than 10 (10 is the highest
-# note). You have access to the variables errors warning, statement which
-# respectively contain the number of errors / warnings messages and the total
-# number of statements analyzed. This is used by the global evaluation report
-# (RP0004).
-evaluation=10.0 - ((float(5 * error + warning + refactor + convention) / statement) * 10)
-
-# Template used to display messages. This is a python new-style format string
-# used to format the message information. See doc for all details
-#msg-template=
-
-
-[BASIC]
-
-# Good variable names which should always be accepted, separated by a comma
-good-names=main,_
-
-# Bad variable names which should always be refused, separated by a comma
-bad-names=
-
-# Colon-delimited sets of names that determine each other's naming style when
-# the name regexes allow several styles.
-name-group=
-
-# Include a hint for the correct naming format with invalid-name
-include-naming-hint=no
-
-# List of decorators that produce properties, such as abc.abstractproperty. Add
-# to this list to register other decorators that produce valid properties.
-property-classes=abc.abstractproperty,cached_property.cached_property,cached_property.threaded_cached_property,cached_property.cached_property_with_ttl,cached_property.threaded_cached_property_with_ttl
-
-# Regular expression matching correct function names
-function-rgx=^(?:(?P<exempt>setUp|tearDown|setUpModule|tearDownModule)|(?P<camel_case>_?[A-Z][a-zA-Z0-9]*)|(?P<snake_case>_?[a-z][a-z0-9_]*))$
-
-# Regular expression matching correct variable names
-variable-rgx=^[a-z][a-z0-9_]*$
-
-# Regular expression matching correct constant names
-const-rgx=^(_?[A-Z][A-Z0-9_]*|__[a-z0-9_]+__|_?[a-z][a-z0-9_]*)$
-
-# Regular expression matching correct attribute names
-attr-rgx=^_{0,2}[a-z][a-z0-9_]*$
-
-# Regular expression matching correct argument names
-argument-rgx=^[a-z][a-z0-9_]*$
-
-# Regular expression matching correct class attribute names
-class-attribute-rgx=^(_?[A-Z][A-Z0-9_]*|__[a-z0-9_]+__|_?[a-z][a-z0-9_]*)$
-
-# Regular expression matching correct inline iteration names
-inlinevar-rgx=^[a-z][a-z0-9_]*$
-
-# Regular expression matching correct class names
-class-rgx=^_?[A-Z][a-zA-Z0-9]*$
-
-# Regular expression matching correct module names
-module-rgx=^(_?[a-z][a-z0-9_]*|__init__)$
-
-# Regular expression matching correct method names
-method-rgx=(?x)^(?:(?P<exempt>_[a-z0-9_]+__|runTest|setUp|tearDown|setUpTestCase|tearDownTestCase|setupSelf|tearDownClass|setUpClass|(test|assert)_*[A-Z0-9][a-zA-Z0-9_]*|next)|(?P<camel_case>_{0,2}[A-Z][a-zA-Z0-9_]*)|(?P<snake_case>_{0,2}[a-z][a-z0-9_]*))$
-
-# Regular expression which should only match function or class names that do
-# not require a docstring.
-no-docstring-rgx=(__.*__|main|test.*|.*test|.*Test)$
-
-# Minimum line length for functions/classes that require docstrings, shorter
-# ones are exempt.
-docstring-min-length=10
-
-
-[TYPECHECK]
-
-# List of decorators that produce context managers, such as
-# contextlib.contextmanager. Add to this list to register other decorators that
-# produce valid context managers.
-contextmanager-decorators=contextlib.contextmanager,contextlib2.contextmanager
-
-# Tells whether missing members accessed in mixin class should be ignored. A
-# mixin class is detected if its name ends with "mixin" (case insensitive).
-ignore-mixin-members=yes
-
-# List of module names for which member attributes should not be checked
-# (useful for modules/projects where namespaces are manipulated during runtime
-# and thus existing member attributes cannot be deduced by static analysis. It
-# supports qualified module names, as well as Unix pattern matching.
-ignored-modules=
-
-# List of class names for which member attributes should not be checked (useful
-# for classes with dynamically set attributes). This supports the use of
-# qualified names.
-ignored-classes=optparse.Values,thread._local,_thread._local
-
-# List of members which are set dynamically and missed by pylint inference
-# system, and so shouldn't trigger E1101 when accessed. Python regular
-# expressions are accepted.
-generated-members=
-
-
-[FORMAT]
-
-# Maximum number of characters on a single line.
-max-line-length=80
-
-# TODO(https://github.com/PyCQA/pylint/issues/3352): Direct pylint to exempt
-# lines made too long by directives to pytype.
-
-# Regexp for a line that is allowed to be longer than the limit.
-ignore-long-lines=(?x)(
-  ^\s*(\#\ )?<?https?://\S+>?$|
-  ^\s*(from\s+\S+\s+)?import\s+.+$)
-
-# Allow the body of an if to be on the same line as the test if there is no
-# else.
-single-line-if-stmt=yes
-
-# Maximum number of lines in a module
-max-module-lines=99999
-
-# String used as indentation unit.  The internal Google style guide mandates 2
-# spaces.  Google's externaly-published style guide says 4, consistent with
-# PEP 8.  Here, we use 2 spaces, for conformity with many open-sourced Google
-# projects (like TensorFlow).
-indent-string='    '
-
-# Number of spaces of indent required inside a hanging  or continued line.
-indent-after-paren=4
-
-# Expected format of line ending, e.g. empty (any line ending), LF or CRLF.
-expected-line-ending-format=
-
-
-[MISCELLANEOUS]
-
-# List of note tags to take in consideration, separated by a comma.
-notes=TODO
-
-
-[STRING]
-
-# This flag controls whether inconsistent-quotes generates a warning when the
-# character used as a quote delimiter is used inconsistently within a module.
-check-quote-consistency=yes
-
-
-[VARIABLES]
-
-# Tells whether we should check for unused import in __init__ files.
-init-import=no
-
-# A regular expression matching the name of dummy variables (i.e. expectedly
-# not used).
-dummy-variables-rgx=^\*{0,2}(_$|unused_|dummy_)
-
-# List of additional names supposed to be defined in builtins. Remember that
-# you should avoid to define new builtins when possible.
-additional-builtins=
-
-# List of strings which can identify a callback function by name. A callback
-# name must start or end with one of those strings.
-callbacks=cb_,_cb
-
-# List of qualified module names which can have objects that can redefine
-# builtins.
-redefining-builtins-modules=six,six.moves,past.builtins,future.builtins,functools
-
-
-[LOGGING]
-
-# Logging modules to check that the string format arguments are in logging
-# function parameter format
-logging-modules=logging,absl.logging,tensorflow.io.logging
-
-
-[SIMILARITIES]
-
-# Minimum lines number of a similarity.
-min-similarity-lines=4
-
-# Ignore comments when computing similarities.
-ignore-comments=yes
-
-# Ignore docstrings when computing similarities.
-ignore-docstrings=yes
-
-# Ignore imports when computing similarities.
-ignore-imports=no
-
-
-[SPELLING]
-
-# Spelling dictionary name. Available dictionaries: none. To make it working
-# install python-enchant package.
-spelling-dict=
-
-# List of comma separated words that should not be checked.
-spelling-ignore-words=
-
-# A path to a file that contains private dictionary; one word per line.
-spelling-private-dict-file=
-
-# Tells whether to store unknown words to indicated private dictionary in
-# --spelling-private-dict-file option instead of raising a message.
-spelling-store-unknown-words=no
-
-
-[IMPORTS]
-
-# Deprecated modules which should not be used, separated by a comma
-deprecated-modules=regsub,
-                   TERMIOS,
-                   Bastion,
-                   rexec,
-                   sets
-
-# Create a graph of every (i.e. internal and external) dependencies in the
-# given file (report RP0402 must not be disabled)
-import-graph=
-
-# Create a graph of external dependencies in the given file (report RP0402 must
-# not be disabled)
-ext-import-graph=
-
-# Create a graph of internal dependencies in the given file (report RP0402 must
-# not be disabled)
-int-import-graph=
-
-# Force import order to recognize a module as part of the standard
-# compatibility libraries.
-known-standard-library=
-
-# Force import order to recognize a module as part of a third party library.
-known-third-party=enchant, absl
-
-# Analyse import fallback blocks. This can be used to support both Python 2 and
-# 3 compatible code, which means that the block might have code that exists
-# only in one or another interpreter, leading to false positives when analysed.
-analyse-fallback-blocks=no
-
-
-[CLASSES]
-
-# List of method names used to declare (i.e. assign) instance attributes.
-defining-attr-methods=__init__,
-                      __new__,
-                      setUp
-
-# List of member names, which should be excluded from the protected access
-# warning.
-exclude-protected=_asdict,
-                  _fields,
-                  _replace,
-                  _source,
-                  _make
-
-# List of valid names for the first argument in a class method.
-valid-classmethod-first-arg=cls,
-                            class_
-
-# List of valid names for the first argument in a metaclass class method.
-valid-metaclass-classmethod-first-arg=mcs
-
-
-[EXCEPTIONS]
-
-# Exceptions that will emit a warning when being caught. Defaults to
-# "Exception"
-overgeneral-exceptions=StandardError,
-                       Exception,
-                       BaseException

benchmarks/benchmark_throughput.py

@@ -17,8 +17,7 @@ def sample_requests(
     tokenizer: PreTrainedTokenizerBase,
     fixed_output_len: Optional[int],
 ) -> List[Tuple[str, int, int]]:
-    if fixed_output_len is not None:
-        if fixed_output_len < 4:
+    if fixed_output_len is not None and fixed_output_len < 4:
         raise ValueError("output_len too small")
 
     # Load the dataset.

format.sh

@@ -7,7 +7,7 @@
 #    # Format files that differ from origin/main.
 #    bash format.sh
 
-#    # Commit changed files with message 'Run yapf and pylint'
+#    # Commit changed files with message 'Run yapf and ruff'
 #
 #
 # YAPF + Clang formatter (if installed). This script formats all changed files from the last mergebase.
@@ -22,7 +22,7 @@ ROOT="$(git rev-parse --show-toplevel)"
 builtin cd "$ROOT" || exit 1
 
 YAPF_VERSION=$(yapf --version | awk '{print $2}')
-PYLINT_VERSION=$(pylint --version | head -n 1 | awk '{print $2}')
+RUFF_VERSION=$(ruff --version | awk '{print $2}')
 MYPY_VERSION=$(mypy --version | awk '{print $2}')
 
 # # params: tool name, tool version, required version
@@ -34,7 +34,7 @@ tool_version_check() {
 }
 
 tool_version_check "yapf" $YAPF_VERSION "$(grep yapf requirements-dev.txt | cut -d'=' -f3)"
-tool_version_check "pylint" $PYLINT_VERSION "$(grep "pylint==" requirements-dev.txt | cut -d'=' -f3)"
+tool_version_check "ruff" $RUFF_VERSION "$(grep "ruff==" requirements-dev.txt | cut -d'=' -f3)"
 tool_version_check "mypy" "$MYPY_VERSION" "$(grep mypy requirements-dev.txt | cut -d'=' -f3)"
 
 YAPF_FLAGS=(
@@ -95,14 +95,14 @@ echo 'vLLM yapf: Done'
 
 # Lint specified files
 lint() {
-    pylint "$@"
+    ruff "$@"
 }
 
 # Lint files that differ from main branch. Ignores dirs that are not slated
 # for autolint yet.
 lint_changed() {
     # The `if` guard ensures that the list of filenames is not empty, which
-    # could cause pylint to receive 0 positional arguments, making it hang
+    # could cause ruff to receive 0 positional arguments, making it hang
     # waiting for STDIN.
     #
     # `diff-filter=ACM` and $MERGEBASE is to ensure we only lint files that
@@ -111,13 +111,13 @@ lint_changed() {
 
     if ! git diff --diff-filter=ACM --quiet --exit-code "$MERGEBASE" -- '*.py' '*.pyi' &>/dev/null; then
         git diff --name-only --diff-filter=ACM "$MERGEBASE" -- '*.py' '*.pyi' | xargs \
-             pylint
+             ruff
     fi
 
 }
 
-# Run Pylint
-echo 'vLLM Pylint:'
+# Run Ruff
+echo 'vLLM Ruff:'
 ## This flag lints individual files. --files *must* be the first command line
 ## arg to use this option.
 if [[ "$1" == '--files' ]]; then

pyproject.toml

@@ -7,3 +7,27 @@ requires = [
     "wheel",
 ]
 build-backend = "setuptools.build_meta"
+
+[tool.ruff.lint]
+select = [
+    # pycodestyle
+    "E",
+    # Pyflakes
+    "F",
+    # pyupgrade
+    # "UP",
+    # flake8-bugbear
+    "B",
+    # flake8-simplify
+    "SIM",
+    # isort
+    # "I",
+]
+ignore = [
+    # star imports
+    "F405", "F403",
+    # lambda expression assignment
+    "E731",
+    # line too long, handled by black formatting
+    "E501",
+]

requirements-dev.txt

 # formatting
 yapf==0.32.0
-pylint==2.8.2
+ruff==0.1.5
 
 # type checking
 mypy==0.991

setup.py

@@ -75,7 +75,8 @@ def get_torch_arch_list() -> Set[str]:
             f"Unsupported CUDA architectures ({invalid_arch_list}) are "
             "excluded from the `TORCH_CUDA_ARCH_LIST` env variable "
             f"({env_arch_list}). Supported CUDA architectures are: "
-            f"{valid_archs}.")
+            f"{valid_archs}.",
+            stacklevel=2)
     return arch_list
 
 
@@ -106,8 +107,8 @@ if not compute_capabilities:
 # Validate the NVCC CUDA version.
 if nvcc_cuda_version < Version("11.0"):
     raise RuntimeError("CUDA 11.0 or higher is required to build the package.")
-if nvcc_cuda_version < Version("11.1"):
-    if any(cc.startswith("8.6") for cc in compute_capabilities):
+if (nvcc_cuda_version < Version("11.1")
+        and any(cc.startswith("8.6") for cc in compute_capabilities)):
     raise RuntimeError(
         "CUDA 11.1 or higher is required for compute capability 8.6.")
 if nvcc_cuda_version < Version("11.8"):
@@ -119,7 +120,8 @@ if nvcc_cuda_version < Version("11.8"):
         # instead of 8.9.
         warnings.warn(
             "CUDA 11.8 or higher is required for compute capability 8.9. "
-            "Targeting compute capability 8.0 instead.")
+            "Targeting compute capability 8.0 instead.",
+            stacklevel=2)
         compute_capabilities = set(cc for cc in compute_capabilities
                                    if not cc.startswith("8.9"))
         compute_capabilities.add("8.0+PTX")

tests/async_engine/api_server_async_engine.py

@@ -14,7 +14,6 @@ app = vllm.entrypoints.api_server.app
 
 class AsyncLLMEngineWithStats(AsyncLLMEngine):
 
-    # pylint: disable=redefined-outer-name
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self._num_aborts = 0

tests/async_engine/test_api_server.py

@@ -24,7 +24,6 @@ def _query_server(prompt: str) -> dict:
 def api_server():
     script_path = Path(__file__).parent.joinpath(
         "api_server_async_engine.py").absolute()
-    # pylint: disable=consider-using-with
     uvicorn_process = subprocess.Popen([
         sys.executable, "-u",
         str(script_path), "--model", "facebook/opt-125m"
@@ -33,7 +32,6 @@ def api_server():
     uvicorn_process.terminate()
 
 
-# pylint: disable=redefined-outer-name, unused-argument
 def test_api_server(api_server):
     """
     Run the API server and test it.
@@ -49,11 +47,10 @@ def test_api_server(api_server):
         prompts = ["Hello world"] * 1
         result = None
         while not result:
-            # pylint: disable=bare-except
             try:
-                for result in pool.map(_query_server, prompts):
+                for _ in pool.map(_query_server, prompts):
                     break
-            except:
+            except Exception:
                 time.sleep(1)
 
         # Actual tests start here

tests/conftest.py

@@ -8,7 +8,6 @@ from vllm import LLM, SamplingParams
 from vllm.transformers_utils.tokenizer import get_tokenizer
 
 _TEST_PROMPTS = [
-    # pylint: disable=line-too-long
     "vLLM is a high-throughput and memory-efficient inference and serving engine for LLMs.",
     "Briefly describe the major milestones in the development of artificial intelligence from 1950 to 2020.",
     "Compare and contrast artificial intelligence with human intelligence in terms of processing information.",

tests/engine/test_detokenize.py

@@ -5,10 +5,9 @@ from transformers import AutoTokenizer
 from vllm.transformers_utils.tokenizer import detokenize_incrementally
 
 TRUTH = [
-    # pylint: disable=line-too-long
-    "Hello here, this is a simple test",
-    "vLLM is a high-throughput and memory-efficient inference and serving engine for LLMs. It is designed to be used in production environments, where inference and serving",
-    "我很感谢你的热情"
+    "Hello here, this is a simple test",  # noqa: E501
+    "vLLM is a high-throughput and memory-efficient inference and serving engine for LLMs. It is designed to be used in production environments, where inference and serving",  # noqa: E501
+    "我很感谢你的热情"  # noqa: E501
 ]
 TOKENIZERS = [
     "facebook/opt-125m",

tests/kernels/test_attention.py

@@ -211,7 +211,7 @@ def test_paged_attention(
             alibi_slopes,
         )
     else:
-        assert False, f"Unknown version: {version}"
+        raise AssertionError(f"Unknown version: {version}")
 
     # Run the reference implementation.
     ref_output = torch.empty_like(query)

tests/samplers/test_sampler.py

-# pylint: disable=protected-access
 import random
 from typing import Tuple
 from unittest.mock import patch
@@ -20,8 +19,8 @@ class MockLogitsSampler(Sampler):
 
     def forward(self, *args, **kwargs):
         with patch("vllm.model_executor.layers.sampler._prune_hidden_states",
-                   lambda x, y: x):
-            with patch("vllm.model_executor.layers.sampler._get_logits",
+                   lambda x, y: x), patch(
+                       "vllm.model_executor.layers.sampler._get_logits",
                        lambda *args, **kwargs: self.fake_logits):
             return super().forward(*args, **kwargs)
 
@@ -214,6 +213,6 @@ def test_sampler_logits_processors(seed: int):
     sampler_output = sampler(embedding=None,
                              hidden_states=input_tensor,
                              input_metadata=input_metadata)
-    for i, sequence_output in enumerate(sampler_output):
+    for _, sequence_output in enumerate(sampler_output):
         for idx, nth_output in enumerate(sequence_output.samples):
             assert nth_output.output_token == idx

tests/worker/test_worker.py

-# pylint: disable=protected-access
 import random
 import torch
 

vllm/core/scheduler.py

@@ -350,7 +350,7 @@ class Scheduler:
         elif preemption_mode == PreemptionMode.SWAP:
             self._preempt_by_swap(seq_group, blocks_to_swap_out)
         else:
-            assert False, "Invalid preemption mode."
+            raise AssertionError("Invalid preemption mode.")
 
     def _preempt_by_recompute(
         self,

vllm/engine/llm_engine.py

@@ -125,7 +125,7 @@ class LLMEngine:
     def _init_workers(self, distributed_init_method: str):
         # Lazy import the Worker to avoid importing torch.cuda/xformers
         # before CUDA_VISIBLE_DEVICES is set in the Worker
-        from vllm.worker.worker import Worker  # pylint: disable=import-outside-toplevel
+        from vllm.worker.worker import Worker
 
         assert self.parallel_config.world_size == 1, (
             "Ray is required if parallel_config.world_size > 1.")
@@ -148,7 +148,7 @@ class LLMEngine:
                           **ray_remote_kwargs):
         # Lazy import the Worker to avoid importing torch.cuda/xformers
         # before CUDA_VISIBLE_DEVICES is set in the Worker
-        from vllm.worker.worker import Worker  # pylint: disable=import-outside-toplevel
+        from vllm.worker.worker import Worker
 
         self.workers: List[Worker] = []
         for bundle in placement_group.bundle_specs:

vllm/engine/ray_utils.py

@@ -16,7 +16,6 @@ try:
 
         def __init__(self, init_cached_hf_modules=False) -> None:
             if init_cached_hf_modules:
-                # pylint: disable=import-outside-toplevel
                 from transformers.dynamic_module_utils import init_hf_modules
                 init_hf_modules()
             self.worker = None
@@ -37,7 +36,7 @@ except ImportError as e:
                    "`pip install ray pandas pyarrow`.")
     ray = None
     TorchDistributedWorker = None
-    RayWorker = None  # pylint: disable=invalid-name
+    RayWorker = None
 
 if TYPE_CHECKING:
     from ray.util.placement_group import PlacementGroup

vllm/entrypoints/llm.py

@@ -134,8 +134,8 @@ class LLM:
         if isinstance(prompts, str):
             # Convert a single prompt to a list.
             prompts = [prompts]
-        if prompts is not None and prompt_token_ids is not None:
-            if len(prompts) != len(prompt_token_ids):
+        if (prompts is not None and prompt_token_ids is not None
+                and len(prompts) != len(prompt_token_ids)):
             raise ValueError("The lengths of prompts and prompt_token_ids "
                              "must be the same.")
         if sampling_params is None:
@@ -143,16 +143,12 @@ class LLM:
             sampling_params = SamplingParams()
 
         # Add requests to the engine.
-        if prompts is not None:
-            num_requests = len(prompts)
-        else:
-            num_requests = len(prompt_token_ids)
+        num_requests = len(prompts) if prompts is not None else len(
+            prompt_token_ids)
         for i in range(num_requests):
             prompt = prompts[i] if prompts is not None else None
-            if prompt_token_ids is None:
-                token_ids = None
-            else:
-                token_ids = prompt_token_ids[i]
+            token_ids = None if prompt_token_ids is None else prompt_token_ids[
+                i]
             self._add_request(prompt, sampling_params, token_ids)
         return self._run_engine(use_tqdm)
 

vllm/entrypoints/openai/api_server.py

@@ -55,7 +55,7 @@ def create_error_response(status_code: HTTPStatus,
 
 
 @app.exception_handler(RequestValidationError)
-async def validation_exception_handler(request, exc):  # pylint: disable=unused-argument
+async def validation_exception_handler(_, exc):
     return create_error_response(HTTPStatus.BAD_REQUEST, str(exc))
 
 
@@ -124,10 +124,8 @@ async def check_length(
     assert (not (prompt is None and prompt_ids is None)
             and not (prompt is not None and prompt_ids is not None)
             ), "Either prompt or prompt_ids should be provided."
-    if prompt_ids is not None:
-        input_ids = prompt_ids
-    else:
-        input_ids = tokenizer(prompt).input_ids
+    input_ids = prompt_ids if prompt_ids is not None else tokenizer(
+        prompt).input_ids
     token_num = len(input_ids)
 
     if request.max_tokens is None:

vllm/model_executor/layers/activation.py

@@ -84,11 +84,10 @@ def get_act_fn(
             f"Activation function {act_fn_name!r} is not supported.")
 
     act_fn = _ACTIVATION_REGISTRY[act_fn_name]
-    if quant_config is not None:
-        if act_fn_name in quant_config.get_scaled_act_names():
+    if quant_config is not None and act_fn_name in quant_config.get_scaled_act_names(
+    ):
         if intermediate_size is None:
-                raise ValueError(
-                    "intermediate_size must be specified for scaled "
+            raise ValueError("intermediate_size must be specified for scaled "
                              "activation functions.")
         return ScaledActivation(
             act_fn,