.ruff.toml

# Copyright (c) Streamlit Inc. (2018-2022) Snowflake Inc. (2022-2024)
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# In addition to the standard set of exclusions, omit all tests:
extend-exclude = ["lib/streamlit/proto", "lib/streamlit/emojis.py"]
include = [
  "lib/**/*.py",
  "lib/**/*.pyi",
  "e2e_playwright/**/*.py",
  "scripts/**/*.py",
]
target-version = 'py38'
line-length = 88

[lint]
select = [
  "B",      # flake8-bugbear
  "C4",     # Helps you write better list/set/dict comprehensions.
  "E",      # pycodestyle errors
  "FA",     # Verifies files use from __future__ import annotations if a type is used in the module that can be rewritten using PEP 563.
  "F",      # pyflakes
  "I",      # isort - Import sorting
  "ISC",    # Encourage correct string literal concatenation.
  "LOG",    # Checks for issues using the standard library logging module.
  "NPY",    # Linting rules for numpy
  "PYI",    # Linting rules for type annotations.
  "Q",      # Linting rules for quites
  "RUF100", # Unused noqa directive
  "T20",    # Check for Print statements in python files.
  "TCH",    # Move type only imports to type-checking condition.
  "TID",    # Helps you write tidier imports.
  "UP",     # pyupgrade
  "W",      # pycodestyle warnings
]
ignore = [
  "B008",   # Checks for function calls in default function arguments.
  "B904",   # Checks for raise statements in exception handlers that lack a from clause.
  "E501",   # Checks for lines that exceed the specified maximum character length.
  "ISC001", # Checks for implicitly concatenated strings on a single line.
  "NPY002", # Checks for the use of legacy np.random function calls.
  "PYI036", # Checks for incorrect function signatures on __exit__ and __aexit__ methods.
  "PYI041", # Checks for parameter annotations that contain redundant unions between builtin numeric types (e.g., int | float).
  "PYI051", # Checks for redundant unions between a Literal and a builtin supertype of that Literal.
  "UP031",  # Checks for printf-style string formatting, and offers to replace it with str.format calls.
]
# Do not lint files in tests, scripts, and vendor directory:
exclude = [
  "lib/tests/**",
  "lib/streamlit/vendor/**",
  "scripts/**",
  ".github/**",
]

[lint.per-file-ignores]
"e2e_playwright/**" = ["T20", "B018"]
"lib/streamlit/__init__.py" = ["E402"]

[lint.flake8-tidy-imports]
# Disallow all relative imports.
ban-relative-imports = "all"

[lint.isort]
known-first-party = ["streamlit", "shared", "tests", "e2e_playwright"]

[lint.flake8-comprehensions]
# Allow dict calls that make use of keyword arguments (e.g., dict(a=1, b=2)).
allow-dict-calls-with-keyword-arguments = true