Open
Description
Bug description
When module-naming-style is set to 'camelCase' Pylint flags the `__main__.py` file with an invalid-name(C0103) in the default configuration.
This file serves as the `python -m` entry point, similar to how `__init__.py` should be treated as a special name.
I propose recognizing `__main__.py` as an exception so it doesn’t trigger an invalid-name warning under this naming style.
Configuration
[tool.pylint.main]
# 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 =
# Clear in-memory caches upon conclusion of linting. Useful if running pylint in
# a server-like mode.
# clear-cache-post-run =
# Always return a 0 (non-error) status code, even if lint errors are found. This
# is primarily useful in continuous integration scripts.
# exit-zero =
# A comma-separated list of package or module names from where C extensions may
# be loaded. Extensions are loading into the active Python interpreter and may
# run arbitrary code.
# extension-pkg-allow-list =
# A comma-separated list of package or module names from where C extensions may
# be loaded. Extensions are loading into the active Python interpreter and may
# run arbitrary code. (This is an alternative name to extension-pkg-allow-list
# for backward compatibility.)
# extension-pkg-whitelist =
# Return non-zero exit code if any of these messages/categories are detected,
# even if score is above --fail-under value. Syntax same as enable. Messages
# specified are enabled, while categories only check already-enabled messages.
# fail-on =
# Specify a score threshold under which the program will exit with error.
fail-under = 10
# Interpret the stdin as a python script, whose filename needs to be passed as
# the module_or_package argument.
# from-stdin =
# Files or directories to be skipped. They should be base names, not paths.
ignore = [
"CVS",
"testcases",
"temp",
"simpleTest.py",
"doc",
'buildDoc.py',
'venv',
'.venv',
]
# Add files or directories matching the regular expressions patterns to the
# ignore-list. The regex matches against paths and can be in Posix or Windows
# format. Because '\\' represents the directory delimiter on Windows systems, it
# can't be used as an escape character.
# ignore-paths =
# Files or directories matching the regular expression patterns are skipped. The
# regex matches against base names, not paths. The default value ignores Emacs
# file locks
ignore-patterns = ["^\\.#"]
# List of module names for which member attributes should not be checked and will
# not be imported (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 =
# Python code to execute, usually for sys.path manipulation such as
# pygtk.require().
# init-hook =
# Use multiple processes to speed up Pylint. Specifying 0 will auto-detect the
# number of processors available to use, and will cap the count on Windows to
# avoid hangs.
jobs = 1
# Control the amount of potential inferred values when inferring a single object.
# This can help the performance when dealing with large functions or complex,
# nested conditions.
limit-inference-results = 100
# List of plugins (as comma separated values of python module names) to load,
# usually to register additional checkers.
# load-plugins =
# Pickle collected data for later comparisons.
persistent = true
# Resolve imports to .pyi stubs if available. May reduce no-member messages and
# increase not-an-iterable messages.
# prefer-stubs =
# Minimum Python version to use for version dependent checks. Will default to the
# version used to run pylint.
py-version = "3.12"
# Discover python modules and packages in the file system subtree.
# recursive =
# Add paths to the list of the source roots. Supports globbing patterns. The
# source root is an absolute path or a path relative to the current working
# directory used to determine a package namespace for modules located under the
# source root.
source-roots = ["src"]
# When enabled, pylint would attempt to guess common misconfiguration and emit
# user-friendly hints instead of false-positive error messages.
suggestion-mode = true
# Allow loading of arbitrary C extensions. Extensions are imported into the
# active Python interpreter and may run arbitrary code.
# unsafe-load-any-extension =
[tool.pylint.basic]
# Naming style matching correct argument names.
argument-naming-style = "camelCase"
# Regular expression matching correct argument names. Overrides argument-naming-
# style. If left empty, argument names will be checked with the set naming style.
# argument-rgx =
# Naming style matching correct attribute names.
attr-naming-style = "camelCase"
# Regular expression matching correct attribute names. Overrides attr-naming-
# style. If left empty, attribute names will be checked with the set naming
# style.
# attr-rgx =
# Bad variable names which should always be refused, separated by a comma.
bad-names = ["foo", "bar", "baz", "toto", "tutu", "tata"]
# Bad variable names regexes, separated by a comma. If names match any regex,
# they will always be refused
# bad-names-rgxs =
# Naming style matching correct class attribute names.
class-attribute-naming-style = "any"
# Regular expression matching correct class attribute names. Overrides class-
# attribute-naming-style. If left empty, class attribute names will be checked
# with the set naming style.
# class-attribute-rgx =
# Naming style matching correct class constant names.
class-const-naming-style = "UPPER_CASE"
# Regular expression matching correct class constant names. Overrides class-
# const-naming-style. If left empty, class constant names will be checked with
# the set naming style.
# class-const-rgx =
# Naming style matching correct class names.
class-naming-style = "PascalCase"
# Regular expression matching correct class names. Overrides class-naming-style.
# If left empty, class names will be checked with the set naming style.
class-rgx = "[A-Z][a-z]+"
# Naming style matching correct constant names.
const-naming-style = "UPPER_CASE"
# Regular expression matching correct constant names. Overrides const-naming-
# style. If left empty, constant names will be checked with the set naming style.
# const-rgx =
# Minimum line length for functions/classes that require docstrings, shorter ones
# are exempt.
docstring-min-length = -1
# Naming style matching correct function names.
function-naming-style = "camelCase"
# Regular expression matching correct function names. Overrides function-naming-
# style. If left empty, function names will be checked with the set naming style.
# function-rgx =
# Good variable names which should always be accepted, separated by a comma.
good-names = ["i", "j", "k", "ex", "Run", "_"]
# Good variable names regexes, separated by a comma. If names match any regex,
# they will always be accepted
# good-names-rgxs =
# Include a hint for the correct naming format with invalid-name.
# include-naming-hint =
# Naming style matching correct inline iteration names.
inlinevar-naming-style = "any"
# Regular expression matching correct inline iteration names. Overrides
# inlinevar-naming-style. If left empty, inline iteration names will be checked
# with the set naming style.
# inlinevar-rgx =
# Naming style matching correct method names.
method-naming-style = "camelCase"
# Regular expression matching correct method names. Overrides method-naming-
# style. If left empty, method names will be checked with the set naming style.
# method-rgx =
# Naming style matching correct module names.
module-naming-style = "camelCase"
# Regular expression matching correct module names. Overrides module-naming-
# style. If left empty, module names will be checked with the set naming style.
# module-rgx =
# Colon-delimited sets of names that determine each other's naming style when the
# name regexes allow several styles.
# name-group =
# Regular expression which should only match function or class names that do not
# require a docstring.
no-docstring-rgx = "^_"
# List of decorators that produce properties, such as abc.abstractproperty. Add
# to this list to register other decorators that produce valid properties. These
# decorators are taken in consideration only for invalid-name.
property-classes = ["abc.abstractproperty"]
# Regular expression matching correct type alias names. If left empty, type alias
# names will be checked with the set naming style.
# typealias-rgx =
# Regular expression matching correct type variable names. If left empty, type
# variable names will be checked with the set naming style.
# typevar-rgx =
# Naming style matching correct variable names.
variable-naming-style = "camelCase"
# Regular expression matching correct variable names. Overrides variable-naming-
# style. If left empty, variable names will be checked with the set naming style.
# variable-rgx =
[tool.pylint.classes]
# Warn about protected attribute access inside special methods
# check-protected-access-in-special-methods =
# List of method names used to declare (i.e. assign) instance attributes.
defining-attr-methods = [
"__init__",
"__new__",
"setUp",
"asyncSetUp",
"__post_init__",
]
# List of member names, which should be excluded from the protected access
# warning.
exclude-protected = [
"_asdict",
"_fields",
"_replace",
"_source",
"_make",
"os._exit",
]
# List of valid names for the first argument in a class method.
valid-classmethod-first-arg = ["cls"]
# List of valid names for the first argument in a metaclass class method.
valid-metaclass-classmethod-first-arg = ["mcs"]
[tool.pylint.design]
# List of regular expressions of class ancestor names to ignore when counting
# public methods (see R0903)
# exclude-too-few-public-methods =
# List of qualified class names to ignore when counting class parents (see R0901)
# ignored-parents =
# Maximum number of arguments for function / method.
max-args = 5
# Maximum number of attributes for a class (see R0902).
max-attributes = 7
# Maximum number of boolean expressions in an if statement (see R0916).
max-bool-expr = 5
# Maximum number of branch for function / method body.
max-branches = 12
# Maximum number of locals for function / method body.
max-locals = 15
# Maximum number of parents for a class (see R0901).
max-parents = 7
# Maximum number of positional arguments for function / method.
max-positional-arguments = 5
# Maximum number of public methods for a class (see R0904).
max-public-methods = 20
# Maximum number of return / yield for function / method body.
max-returns = 6
# Maximum number of statements in function / method body.
max-statements = 50
# Minimum number of public methods for a class (see R0903).
min-public-methods = 2
[tool.pylint.exceptions]
# Exceptions that will emit a warning when caught.
overgeneral-exceptions = ["builtins.BaseException", "builtins.Exception"]
[tool.pylint.format]
# Expected format of line ending, e.g. empty (any line ending), LF or CRLF.
# expected-line-ending-format =
# Regexp for a line that is allowed to be longer than the limit.
ignore-long-lines = "^\\s*(# )?<?https?://\\S+>?$"
# Number of spaces of indent required inside a hanging or continued line.
indent-after-paren = 4
# String used as indentation unit. This is usually " " (4 spaces) or "\t" (1
# tab).
indent-string = " "
# Maximum number of characters on a single line.
max-line-length = 100
# Maximum number of lines in a module.
max-module-lines = 1000
# Allow the body of a class to be on the same line as the declaration if body
# contains single statement.
# single-line-class-stmt =
# Allow the body of an if to be on the same line as the test if there is no else.
# single-line-if-stmt =
[tool.pylint.imports]
# List of modules that can be imported at any level, not just the top level one.
# allow-any-import-level =
# Allow explicit reexports by alias from a package __init__.
# allow-reexport-from-package =
# Allow wildcard imports from modules that define __all__.
# allow-wildcard-with-all =
# Deprecated modules which should not be used, separated by a comma.
# deprecated-modules =
# Output a graph (.gv or any supported image format) of external dependencies to
# the given file (report RP0402 must not be disabled).
# ext-import-graph =
# Output a graph (.gv or any supported image format) of all (i.e. internal and
# external) dependencies to the given file (report RP0402 must not be disabled).
# import-graph =
# Output a graph (.gv or any supported image format) of internal dependencies to
# 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"]
# Couples of modules and preferred modules, separated by a comma.
# preferred-modules =
[tool.pylint.logging]
# The type of string formatting that logging methods do. `old` means using %
# formatting, `new` is for `{}` formatting.
logging-format-style = "old"
# Logging modules to check that the string format arguments are in logging
# function parameter format.
logging-modules = ["logging"]
[tool.pylint."messages control"]
# Only show warnings with the listed confidence levels. Leave empty to show all.
# Valid levels: HIGH, CONTROL_FLOW, INFERENCE, INFERENCE_FAILURE, UNDEFINED.
confidence = [
"HIGH",
"CONTROL_FLOW",
"INFERENCE",
"INFERENCE_FAILURE",
"UNDEFINED",
]
# 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 re-enable 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 = [
"raw-checker-failed",
"bad-inline-option",
"locally-disabled",
"file-ignored",
"suppressed-message",
"useless-suppression",
"deprecated-pragma",
"use-symbolic-message-instead",
"use-implicit-booleaness-not-comparison-to-string",
"use-implicit-booleaness-not-comparison-to-zero",
]
# 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 =
[tool.pylint.method_args]
# List of qualified names (i.e., library.method) which require a timeout
# parameter e.g. 'requests.api.get,requests.api.post'
timeout-methods = [
"requests.api.delete",
"requests.api.get",
"requests.api.head",
"requests.api.options",
"requests.api.patch",
"requests.api.post",
"requests.api.put",
"requests.api.request",
]
[tool.pylint.miscellaneous]
# List of note tags to take in consideration, separated by a comma.
notes = ["FIXME", "XXX", "TODO"]
# Regular expression of note tags to take in consideration.
# notes-rgx =
[tool.pylint.refactoring]
# Maximum number of nested blocks for function / method body
max-nested-blocks = 5
# Complete name of functions that never returns. When checking for inconsistent-
# return-statements if a never returning function is called then it will be
# considered as an explicit return statement and no message will be printed.
never-returning-functions = ["sys.exit", "argparse.parse_error"]
# Let 'consider-using-join' be raised when the separator to join on would be non-
# empty (resulting in expected fixes of the type: ``"- " + " - ".join(items)``)
suggest-join-with-non-empty-separator = true
[tool.pylint.reports]
# Python expression which should return a score less than or equal to 10. You
# have access to the variables 'fatal', 'error', 'warning', 'refactor',
# 'convention', and 'info' which contain the number of messages in each category,
# as well as 'statement' which is the total number of statements analyzed. This
# score is used by the global evaluation report (RP0004).
evaluation = "max(0, 0 if fatal else 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 =
# Set the output format. Available formats are: 'text', 'parseable', 'colorized',
# 'json2' (improved json format), 'json' (old json format), msvs (visual studio)
# and 'github' (GitHub actions). You can also give a reporter class, e.g.
# mypackage.mymodule.MyReporterClass.
# output-format =
# Tells whether to display a full report or only the messages.
# reports =
# Activate the evaluation score.
score = true
[tool.pylint.similarities]
# Comments are removed from the similarity computation
ignore-comments = true
# Docstrings are removed from the similarity computation
ignore-docstrings = true
# Imports are removed from the similarity computation
ignore-imports = true
# Signatures are removed from the similarity computation
ignore-signatures = true
# Minimum lines number of a similarity.
min-similarity-lines = 4
[tool.pylint.spelling]
# Limits count of emitted suggestions for spelling mistakes.
max-spelling-suggestions = 4
# Spelling dictionary name. No available dictionaries : You need to install both
# the python package and the system dependency for enchant to work.
# spelling-dict =
# List of comma separated words that should be considered directives if they
# appear at the beginning of a comment and should not be checked.
spelling-ignore-comment-directives = "fmt: on,fmt: off,noqa:,noqa,nosec,isort:skip,mypy:"
# List of comma separated words that should not be checked.
# spelling-ignore-words =
# A path to a file that contains the private dictionary; one word per line.
# spelling-private-dict-file =
# Tells whether to store unknown words to the private dictionary (see the
# --spelling-private-dict-file option) instead of raising a message.
# spelling-store-unknown-words =
[tool.pylint.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"]
# 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 =
# Tells whether missing members accessed in mixin class should be ignored. A
# class is considered mixin if its name matches the mixin-class-rgx option.
# Tells whether to warn about missing members when the owner of the attribute is
# inferred to be None.
ignore-none = true
# This flag controls whether pylint should warn about no-member and similar
# checks whenever an opaque object is returned when inferring. The inference can
# return multiple potential results while evaluating a Python object, but some
# branches might not be evaluated, which results in partial inference. In that
# case, it might be useful to still emit no-member and other checks for the rest
# of the inferred objects.
ignore-on-opaque-inference = true
# List of symbolic message names to ignore for Mixin members.
ignored-checks-for-mixins = [
"no-member",
"not-async-context-manager",
"not-context-manager",
"attribute-defined-outside-init",
]
# 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",
"argparse.Namespace",
]
# Show a hint with possible names when a member name was not found. The aspect of
# finding the hint is based on edit distance.
missing-member-hint = true
# The maximum edit distance a name should have in order to be considered a
# similar match for a missing member name.
missing-member-hint-distance = 1
# The total number of similar names that should be taken in consideration when
# showing a hint for a missing member.
missing-member-max-choices = 1
# Regex pattern to define which classes are considered mixins.
mixin-class-rgx = ".*[Mm]ixin"
# List of decorators that change the signature of a decorated function.
# signature-mutators =
[tool.pylint.variables]
# List of additional names supposed to be defined in builtins. Remember that you
# should avoid defining new builtins when possible.
# additional-builtins =
# Tells whether unused global variables should be treated as a violation.
allow-global-unused-variables = true
# List of names allowed to shadow builtins
# allowed-redefined-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"]
# A regular expression matching the name of dummy variables (i.e. expected to not
# be used).
dummy-variables-rgx = "_+$|(_[a-zA-Z0-9_]*[a-zA-Z0-9]+?$)|dummy|^ignored_|^unused_"
# Argument names that match this expression will be ignored.
ignored-argument-names = "_.*|^ignored_|^unused_"
# Tells whether we should check for unused import in __init__ files.
# init-import =
# List of qualified module names which can have objects that can redefine
# builtins.
redefining-builtins-modules = [
"six.moves",
"past.builtins",
"future.builtins",
"builtins",
"io",
]
Command used
pylint .
Pylint output
************* Module xxx.__main__
src\xxx\__main__.py:1:0: C0103: Module name "__main__" doesn't conform to camelCase naming style (invalid-name)
------------------------------------------------------------------
Your code has been rated at 9.98/10 (previous run: 9.98/10, +0.00)
Expected behavior
__main__.py
should be treated as a special name and is valid in any module-naming-style.
Pylint version
pylint 3.3.7
astroid 3.3.10
Python 3.13.5 (tags/v3.13.5:6cb20a2, Jun 11 2025, 16:15:46) [MSC v.1943 64 bit (AMD64)]
OS / Environment
Windows 10, 19045.6036