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mod.rs
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use std::iter;
use std::path::Path;
use itertools::Itertools;
use log::error;
use nohash_hasher::IntMap;
use rustc_hash::{FxHashMap, FxHashSet};
use rustpython_common::cformat::{CFormatError, CFormatErrorType};
use rustpython_parser as parser;
use rustpython_parser::ast::{
Arg, Arguments, Comprehension, Constant, Excepthandler, ExcepthandlerKind, Expr, ExprContext,
ExprKind, KeywordData, Located, Location, Operator, Pattern, PatternKind, Stmt, StmtKind,
Suite,
};
use ruff_diagnostics::Diagnostic;
use ruff_python_ast::context::Context;
use ruff_python_ast::helpers::{
binding_range, extract_handled_exceptions, to_module_path, Exceptions,
};
use ruff_python_ast::operations::{extract_all_names, AllNamesFlags};
use ruff_python_ast::relocate::relocate_expr;
use ruff_python_ast::source_code::{Indexer, Locator, Stylist};
use ruff_python_ast::types::{
Binding, BindingKind, ClassDef, ExecutionContext, FunctionDef, Lambda, Node, Range,
RefEquality, Scope, ScopeKind,
};
use ruff_python_ast::typing::{match_annotated_subscript, Callable, SubscriptKind};
use ruff_python_ast::visitor::{walk_excepthandler, walk_pattern, Visitor};
use ruff_python_ast::{
branch_detection, cast, helpers, operations, str, typing, visibility, visitor,
};
use ruff_python_stdlib::builtins::{BUILTINS, MAGIC_GLOBALS};
use ruff_python_stdlib::path::is_python_stub_file;
use crate::checkers::ast::deferred::Deferred;
use crate::docstrings::definition::{
transition_scope, Definition, DefinitionKind, Docstring, Documentable,
};
use crate::registry::{AsRule, Rule};
use crate::rules::{
flake8_2020, flake8_annotations, flake8_bandit, flake8_blind_except, flake8_boolean_trap,
flake8_bugbear, flake8_builtins, flake8_comprehensions, flake8_datetimez, flake8_debugger,
flake8_django, flake8_errmsg, flake8_implicit_str_concat, flake8_import_conventions,
flake8_logging_format, flake8_pie, flake8_print, flake8_pyi, flake8_pytest_style, flake8_raise,
flake8_return, flake8_self, flake8_simplify, flake8_tidy_imports, flake8_type_checking,
flake8_unused_arguments, flake8_use_pathlib, mccabe, numpy, pandas_vet, pep8_naming,
pycodestyle, pydocstyle, pyflakes, pygrep_hooks, pylint, pyupgrade, ruff, tryceratops,
};
use crate::settings::types::PythonVersion;
use crate::settings::{flags, Settings};
use crate::{autofix, docstrings, noqa};
mod deferred;
const GLOBAL_SCOPE_INDEX: usize = 0;
type AnnotationContext = (bool, bool);
#[allow(clippy::struct_excessive_bools)]
pub struct Checker<'a> {
// Settings, static metadata, etc.
pub path: &'a Path,
module_path: Option<Vec<String>>,
package: Option<&'a Path>,
is_stub: bool,
autofix: flags::Autofix,
noqa: flags::Noqa,
pub settings: &'a Settings,
pub noqa_line_for: &'a IntMap<usize, usize>,
pub locator: &'a Locator<'a>,
pub stylist: &'a Stylist<'a>,
pub indexer: &'a Indexer,
// Stateful fields.
pub ctx: Context<'a>,
pub deferred: Deferred<'a>,
pub diagnostics: Vec<Diagnostic>,
pub deletions: FxHashSet<RefEquality<'a, Stmt>>,
// Check-specific state.
pub flake8_bugbear_seen: Vec<&'a Expr>,
}
impl<'a> Checker<'a> {
#[allow(clippy::too_many_arguments)]
pub fn new(
settings: &'a Settings,
noqa_line_for: &'a IntMap<usize, usize>,
autofix: flags::Autofix,
noqa: flags::Noqa,
path: &'a Path,
package: Option<&'a Path>,
module_path: Option<Vec<String>>,
locator: &'a Locator,
style: &'a Stylist,
indexer: &'a Indexer,
) -> Checker<'a> {
Checker {
settings,
noqa_line_for,
autofix,
noqa,
path,
package,
module_path: module_path.clone(),
is_stub: is_python_stub_file(path),
locator,
stylist: style,
indexer,
ctx: Context::new(&settings.typing_modules, path, module_path),
deferred: Deferred::default(),
diagnostics: vec![],
deletions: FxHashSet::default(),
flake8_bugbear_seen: vec![],
}
}
}
impl<'a> Checker<'a> {
/// Return `true` if a patch should be generated under the given autofix
/// `Mode`.
pub fn patch(&self, code: &Rule) -> bool {
self.autofix.into() && self.settings.rules.should_fix(code)
}
/// Return `true` if a `Rule` is disabled by a `noqa` directive.
pub fn rule_is_ignored(&self, code: &Rule, lineno: usize) -> bool {
// TODO(charlie): `noqa` directives are mostly enforced in `check_lines.rs`.
// However, in rare cases, we need to check them here. For example, when
// removing unused imports, we create a single fix that's applied to all
// unused members on a single import. We need to pre-emptively omit any
// members from the fix that will eventually be excluded by a `noqa`.
// Unfortunately, we _do_ want to register a `Diagnostic` for each
// eventually-ignored import, so that our `noqa` counts are accurate.
if !self.noqa.to_bool() {
return false;
}
noqa::rule_is_ignored(code, lineno, self.noqa_line_for, self.locator)
}
}
/// Visit an [`Expr`], and treat it as a type definition.
macro_rules! visit_type_definition {
($self:ident, $expr:expr) => {{
let prev_in_type_definition = $self.ctx.in_type_definition;
$self.ctx.in_type_definition = true;
$self.visit_expr($expr);
$self.ctx.in_type_definition = prev_in_type_definition;
}};
}
/// Visit an [`Expr`], and treat it as _not_ a type definition.
macro_rules! visit_non_type_definition {
($self:ident, $expr:expr) => {{
let prev_in_type_definition = $self.ctx.in_type_definition;
$self.ctx.in_type_definition = false;
$self.visit_expr($expr);
$self.ctx.in_type_definition = prev_in_type_definition;
}};
}
impl<'a, 'b> Visitor<'b> for Checker<'a>
where
'b: 'a,
{
fn visit_stmt(&mut self, stmt: &'b Stmt) {
self.ctx.push_parent(stmt);
// Track whether we've seen docstrings, non-imports, etc.
match &stmt.node {
StmtKind::ImportFrom { module, .. } => {
// Allow __future__ imports until we see a non-__future__ import.
if self.ctx.futures_allowed {
if let Some(module) = module {
if module != "__future__" {
self.ctx.futures_allowed = false;
}
}
}
}
StmtKind::Import { .. } => {
self.ctx.futures_allowed = false;
}
_ => {
self.ctx.futures_allowed = false;
if !self.ctx.seen_import_boundary
&& !helpers::is_assignment_to_a_dunder(stmt)
&& !operations::in_nested_block(self.ctx.parents.iter().rev().map(Into::into))
{
self.ctx.seen_import_boundary = true;
}
}
}
// Pre-visit.
match &stmt.node {
StmtKind::Global { names } => {
let scope_index = *self.ctx.scope_stack.last().expect("No current scope found");
let ranges: Vec<Range> = helpers::find_names(stmt, self.locator).collect();
if scope_index != GLOBAL_SCOPE_INDEX {
// Add the binding to the current scope.
let context = self.ctx.execution_context();
let scope = &mut self.ctx.scopes[scope_index];
let usage = Some((scope.id, Range::from(stmt)));
for (name, range) in names.iter().zip(ranges.iter()) {
let index = self.ctx.bindings.len();
self.ctx.bindings.push(Binding {
kind: BindingKind::Global,
runtime_usage: None,
synthetic_usage: usage,
typing_usage: None,
range: *range,
source: Some(RefEquality(stmt)),
context,
});
scope.bindings.insert(name, index);
}
}
if self.settings.rules.enabled(&Rule::AmbiguousVariableName) {
self.diagnostics
.extend(names.iter().zip(ranges.iter()).filter_map(|(name, range)| {
pycodestyle::rules::ambiguous_variable_name(name, *range)
}));
}
}
StmtKind::Nonlocal { names } => {
let scope_index = *self.ctx.scope_stack.last().expect("No current scope found");
let ranges: Vec<Range> = helpers::find_names(stmt, self.locator).collect();
if scope_index != GLOBAL_SCOPE_INDEX {
let context = self.ctx.execution_context();
let scope = &mut self.ctx.scopes[scope_index];
let usage = Some((scope.id, Range::from(stmt)));
for (name, range) in names.iter().zip(ranges.iter()) {
// Add a binding to the current scope.
let index = self.ctx.bindings.len();
self.ctx.bindings.push(Binding {
kind: BindingKind::Nonlocal,
runtime_usage: None,
synthetic_usage: usage,
typing_usage: None,
range: *range,
source: Some(RefEquality(stmt)),
context,
});
scope.bindings.insert(name, index);
}
// Mark the binding in the defining scopes as used too. (Skip the global scope
// and the current scope.)
for (name, range) in names.iter().zip(ranges.iter()) {
let mut exists = false;
for index in self.ctx.scope_stack.iter().skip(1).rev().skip(1) {
if let Some(index) =
self.ctx.scopes[*index].bindings.get(&name.as_str())
{
exists = true;
self.ctx.bindings[*index].runtime_usage = usage;
}
}
// Ensure that every nonlocal has an existing binding from a parent scope.
if !exists {
if self.settings.rules.enabled(&Rule::NonlocalWithoutBinding) {
self.diagnostics.push(Diagnostic::new(
pylint::rules::NonlocalWithoutBinding {
name: name.to_string(),
},
*range,
));
}
}
}
}
if self.settings.rules.enabled(&Rule::AmbiguousVariableName) {
self.diagnostics
.extend(names.iter().zip(ranges.iter()).filter_map(|(name, range)| {
pycodestyle::rules::ambiguous_variable_name(name, *range)
}));
}
}
StmtKind::Break => {
if self.settings.rules.enabled(&Rule::BreakOutsideLoop) {
if let Some(diagnostic) = pyflakes::rules::break_outside_loop(
stmt,
&mut self.ctx.parents.iter().rev().map(Into::into).skip(1),
) {
self.diagnostics.push(diagnostic);
}
}
}
StmtKind::Continue => {
if self.settings.rules.enabled(&Rule::ContinueOutsideLoop) {
if let Some(diagnostic) = pyflakes::rules::continue_outside_loop(
stmt,
&mut self.ctx.parents.iter().rev().map(Into::into).skip(1),
) {
self.diagnostics.push(diagnostic);
}
}
}
StmtKind::FunctionDef {
name,
decorator_list,
returns,
args,
body,
..
}
| StmtKind::AsyncFunctionDef {
name,
decorator_list,
returns,
args,
body,
..
} => {
if self
.settings
.rules
.enabled(&Rule::NonLeadingReceiverDecorator)
{
self.diagnostics
.extend(flake8_django::rules::non_leading_receiver_decorator(
decorator_list,
|expr| self.ctx.resolve_call_path(expr),
));
}
if self.settings.rules.enabled(&Rule::AmbiguousFunctionName) {
if let Some(diagnostic) =
pycodestyle::rules::ambiguous_function_name(name, || {
helpers::identifier_range(stmt, self.locator)
})
{
self.diagnostics.push(diagnostic);
}
}
if self.settings.rules.enabled(&Rule::InvalidFunctionName) {
if let Some(diagnostic) = pep8_naming::rules::invalid_function_name(
stmt,
name,
&self.settings.pep8_naming.ignore_names,
self.locator,
) {
self.diagnostics.push(diagnostic);
}
}
if self
.settings
.rules
.enabled(&Rule::InvalidFirstArgumentNameForClassMethod)
{
if let Some(diagnostic) =
pep8_naming::rules::invalid_first_argument_name_for_class_method(
self,
self.ctx.current_scope(),
name,
decorator_list,
args,
)
{
self.diagnostics.push(diagnostic);
}
}
if self
.settings
.rules
.enabled(&Rule::InvalidFirstArgumentNameForMethod)
{
if let Some(diagnostic) =
pep8_naming::rules::invalid_first_argument_name_for_method(
self,
self.ctx.current_scope(),
name,
decorator_list,
args,
)
{
self.diagnostics.push(diagnostic);
}
}
if self.is_stub {
if self.settings.rules.enabled(&Rule::PassStatementStubBody) {
flake8_pyi::rules::pass_statement_stub_body(self, body);
}
if self.settings.rules.enabled(&Rule::NonEmptyStubBody) {
flake8_pyi::rules::non_empty_stub_body(self, body);
}
}
if self.settings.rules.enabled(&Rule::DunderFunctionName) {
if let Some(diagnostic) = pep8_naming::rules::dunder_function_name(
self.ctx.current_scope(),
stmt,
name,
self.locator,
) {
self.diagnostics.push(diagnostic);
}
}
if self.settings.rules.enabled(&Rule::GlobalStatement) {
pylint::rules::global_statement(self, name);
}
if self
.settings
.rules
.enabled(&Rule::LRUCacheWithoutParameters)
&& self.settings.target_version >= PythonVersion::Py38
{
pyupgrade::rules::lru_cache_without_parameters(self, decorator_list);
}
if self.settings.rules.enabled(&Rule::FunctoolsCache)
&& self.settings.target_version >= PythonVersion::Py39
{
pyupgrade::rules::functools_cache(self, decorator_list);
}
if self.settings.rules.enabled(&Rule::UselessExpression) {
flake8_bugbear::rules::useless_expression(self, body);
}
if self.settings.rules.enabled(&Rule::CachedInstanceMethod) {
flake8_bugbear::rules::cached_instance_method(self, decorator_list);
}
if self.settings.rules.enabled(&Rule::UnnecessaryReturnNone)
|| self.settings.rules.enabled(&Rule::ImplicitReturnValue)
|| self.settings.rules.enabled(&Rule::ImplicitReturn)
|| self.settings.rules.enabled(&Rule::UnnecessaryAssign)
|| self.settings.rules.enabled(&Rule::SuperfluousElseReturn)
|| self.settings.rules.enabled(&Rule::SuperfluousElseRaise)
|| self.settings.rules.enabled(&Rule::SuperfluousElseContinue)
|| self.settings.rules.enabled(&Rule::SuperfluousElseBreak)
{
flake8_return::rules::function(self, body);
}
if self.settings.rules.enabled(&Rule::ComplexStructure) {
if let Some(diagnostic) = mccabe::rules::function_is_too_complex(
stmt,
name,
body,
self.settings.mccabe.max_complexity,
self.locator,
) {
self.diagnostics.push(diagnostic);
}
}
if self.settings.rules.enabled(&Rule::HardcodedPasswordDefault) {
self.diagnostics
.extend(flake8_bandit::rules::hardcoded_password_default(args));
}
if self.settings.rules.enabled(&Rule::PropertyWithParameters) {
pylint::rules::property_with_parameters(self, stmt, decorator_list, args);
}
if self.settings.rules.enabled(&Rule::TooManyArguments) {
pylint::rules::too_many_arguments(self, args, stmt);
}
if self.settings.rules.enabled(&Rule::TooManyReturnStatements) {
if let Some(diagnostic) = pylint::rules::too_many_return_statements(
stmt,
body,
self.settings.pylint.max_returns,
self.locator,
) {
self.diagnostics.push(diagnostic);
}
}
if self.settings.rules.enabled(&Rule::TooManyBranches) {
if let Some(diagnostic) = pylint::rules::too_many_branches(
stmt,
body,
self.settings.pylint.max_branches,
self.locator,
) {
self.diagnostics.push(diagnostic);
}
}
if self.settings.rules.enabled(&Rule::TooManyStatements) {
if let Some(diagnostic) = pylint::rules::too_many_statements(
stmt,
body,
self.settings.pylint.max_statements,
self.locator,
) {
self.diagnostics.push(diagnostic);
}
}
if self
.settings
.rules
.enabled(&Rule::IncorrectFixtureParenthesesStyle)
|| self.settings.rules.enabled(&Rule::FixturePositionalArgs)
|| self.settings.rules.enabled(&Rule::ExtraneousScopeFunction)
|| self
.settings
.rules
.enabled(&Rule::MissingFixtureNameUnderscore)
|| self
.settings
.rules
.enabled(&Rule::IncorrectFixtureNameUnderscore)
|| self.settings.rules.enabled(&Rule::FixtureParamWithoutValue)
|| self.settings.rules.enabled(&Rule::DeprecatedYieldFixture)
|| self.settings.rules.enabled(&Rule::FixtureFinalizerCallback)
|| self.settings.rules.enabled(&Rule::UselessYieldFixture)
|| self
.settings
.rules
.enabled(&Rule::UnnecessaryAsyncioMarkOnFixture)
|| self
.settings
.rules
.enabled(&Rule::ErroneousUseFixturesOnFixture)
{
flake8_pytest_style::rules::fixture(
self,
stmt,
name,
args,
decorator_list,
body,
);
}
if self
.settings
.rules
.enabled(&Rule::ParametrizeNamesWrongType)
|| self
.settings
.rules
.enabled(&Rule::ParametrizeValuesWrongType)
{
flake8_pytest_style::rules::parametrize(self, decorator_list);
}
if self
.settings
.rules
.enabled(&Rule::IncorrectMarkParenthesesStyle)
|| self
.settings
.rules
.enabled(&Rule::UseFixturesWithoutParameters)
{
flake8_pytest_style::rules::marks(self, decorator_list);
}
if self
.settings
.rules
.enabled(&Rule::BooleanPositionalArgInFunctionDefinition)
{
flake8_boolean_trap::rules::check_positional_boolean_in_def(
self,
name,
decorator_list,
args,
);
}
if self
.settings
.rules
.enabled(&Rule::BooleanDefaultValueInFunctionDefinition)
{
flake8_boolean_trap::rules::check_boolean_default_value_in_function_definition(
self,
name,
decorator_list,
args,
);
}
self.check_builtin_shadowing(name, stmt, true);
// Visit the decorators and arguments, but avoid the body, which will be
// deferred.
for expr in decorator_list {
self.visit_expr(expr);
}
// If we're in a class or module scope, then the annotation needs to be
// available at runtime.
// See: https://docs.python.org/3/reference/simple_stmts.html#annotated-assignment-statements
let runtime_annotation = !self.ctx.annotations_future_enabled
&& matches!(
self.ctx.current_scope().kind,
ScopeKind::Class(..) | ScopeKind::Module
);
for arg in &args.posonlyargs {
if let Some(expr) = &arg.node.annotation {
if runtime_annotation {
visit_type_definition!(self, expr);
} else {
self.visit_annotation(expr);
};
}
}
for arg in &args.args {
if let Some(expr) = &arg.node.annotation {
if runtime_annotation {
visit_type_definition!(self, expr);
} else {
self.visit_annotation(expr);
};
}
}
if let Some(arg) = &args.vararg {
if let Some(expr) = &arg.node.annotation {
if runtime_annotation {
visit_type_definition!(self, expr);
} else {
self.visit_annotation(expr);
};
}
}
for arg in &args.kwonlyargs {
if let Some(expr) = &arg.node.annotation {
if runtime_annotation {
visit_type_definition!(self, expr);
} else {
self.visit_annotation(expr);
};
}
}
if let Some(arg) = &args.kwarg {
if let Some(expr) = &arg.node.annotation {
if runtime_annotation {
visit_type_definition!(self, expr);
} else {
self.visit_annotation(expr);
};
}
}
for expr in returns {
if runtime_annotation {
visit_type_definition!(self, expr);
} else {
self.visit_annotation(expr);
};
}
for expr in &args.kw_defaults {
self.visit_expr(expr);
}
for expr in &args.defaults {
self.visit_expr(expr);
}
let context = self.ctx.execution_context();
self.add_binding(
name,
Binding {
kind: BindingKind::FunctionDefinition,
runtime_usage: None,
synthetic_usage: None,
typing_usage: None,
range: Range::from(stmt),
source: Some(self.ctx.current_stmt().clone()),
context,
},
);
}
StmtKind::Return { .. } => {
if self.settings.rules.enabled(&Rule::ReturnOutsideFunction) {
pyflakes::rules::return_outside_function(self, stmt);
}
if self.settings.rules.enabled(&Rule::ReturnInInit) {
pylint::rules::return_in_init(self, stmt);
}
}
StmtKind::ClassDef {
name,
bases,
keywords,
decorator_list,
body,
} => {
if self.settings.rules.enabled(&Rule::NullableModelStringField) {
self.diagnostics
.extend(flake8_django::rules::nullable_model_string_field(
self, body,
));
}
if self.settings.rules.enabled(&Rule::ExcludeWithModelForm) {
if let Some(diagnostic) =
flake8_django::rules::exclude_with_model_form(self, bases, body)
{
self.diagnostics.push(diagnostic);
}
}
if self.settings.rules.enabled(&Rule::AllWithModelForm) {
if let Some(diagnostic) =
flake8_django::rules::all_with_model_form(self, bases, body)
{
self.diagnostics.push(diagnostic);
}
}
if self.settings.rules.enabled(&Rule::ModelWithoutDunderStr) {
if let Some(diagnostic) =
flake8_django::rules::model_without_dunder_str(self, bases, body, stmt)
{
self.diagnostics.push(diagnostic);
}
}
if self.settings.rules.enabled(&Rule::GlobalStatement) {
pylint::rules::global_statement(self, name);
}
if self.settings.rules.enabled(&Rule::UselessObjectInheritance) {
pyupgrade::rules::useless_object_inheritance(self, stmt, name, bases, keywords);
}
if self.settings.rules.enabled(&Rule::AmbiguousClassName) {
if let Some(diagnostic) = pycodestyle::rules::ambiguous_class_name(name, || {
helpers::identifier_range(stmt, self.locator)
}) {
self.diagnostics.push(diagnostic);
}
}
if self.settings.rules.enabled(&Rule::InvalidClassName) {
if let Some(diagnostic) =
pep8_naming::rules::invalid_class_name(stmt, name, self.locator)
{
self.diagnostics.push(diagnostic);
}
}
if self
.settings
.rules
.enabled(&Rule::ErrorSuffixOnExceptionName)
{
if let Some(diagnostic) = pep8_naming::rules::error_suffix_on_exception_name(
stmt,
bases,
name,
self.locator,
) {
self.diagnostics.push(diagnostic);
}
}
if self.settings.rules.enabled(&Rule::UselessExpression) {
flake8_bugbear::rules::useless_expression(self, body);
}
if !self.is_stub {
if self
.settings
.rules
.enabled(&Rule::AbstractBaseClassWithoutAbstractMethod)
|| self
.settings
.rules
.enabled(&Rule::EmptyMethodWithoutAbstractDecorator)
{
flake8_bugbear::rules::abstract_base_class(
self, stmt, name, bases, keywords, body,
);
}
}
if self.is_stub {
if self.settings.rules.enabled(&Rule::PassStatementStubBody) {
flake8_pyi::rules::pass_statement_stub_body(self, body);
}
}
if self
.settings
.rules
.enabled(&Rule::IncorrectMarkParenthesesStyle)
{
flake8_pytest_style::rules::marks(self, decorator_list);
}
if self
.settings
.rules
.enabled(&Rule::DupeClassFieldDefinitions)
{
flake8_pie::rules::dupe_class_field_definitions(self, stmt, body);
}
if self.settings.rules.enabled(&Rule::PreferUniqueEnums) {
flake8_pie::rules::prefer_unique_enums(self, stmt, body);
}
self.check_builtin_shadowing(name, stmt, false);
for expr in bases {
self.visit_expr(expr);
}
for keyword in keywords {
self.visit_keyword(keyword);
}
for expr in decorator_list {
self.visit_expr(expr);
}
}
StmtKind::Import { names } => {
if self.settings.rules.enabled(&Rule::MultipleImportsOnOneLine) {
pycodestyle::rules::multiple_imports_on_one_line(self, stmt, names);
}
if self
.settings
.rules
.enabled(&Rule::ModuleImportNotAtTopOfFile)
{
pycodestyle::rules::module_import_not_at_top_of_file(self, stmt);
}
if self.settings.rules.enabled(&Rule::GlobalStatement) {
for name in names.iter() {
if let Some(asname) = name.node.asname.as_ref() {
pylint::rules::global_statement(self, asname);
} else {
pylint::rules::global_statement(self, &name.node.name);
}
}
}
if self.settings.rules.enabled(&Rule::RewriteCElementTree) {
pyupgrade::rules::replace_c_element_tree(self, stmt);
}
if self.settings.rules.enabled(&Rule::RewriteMockImport) {
pyupgrade::rules::rewrite_mock_import(self, stmt);
}
// If a module is imported within a `ModuleNotFoundError` body, treat that as a
// synthetic usage.
let is_handled = self
.ctx
.handled_exceptions
.iter()
.any(|exceptions| exceptions.contains(Exceptions::MODULE_NOT_FOUND_ERROR));
for alias in names {
if alias.node.name == "__future__" {
let name = alias.node.asname.as_ref().unwrap_or(&alias.node.name);
self.add_binding(
name,
Binding {
kind: BindingKind::FutureImportation,
runtime_usage: None,
// Always mark `__future__` imports as used.
synthetic_usage: Some((
self.ctx.scopes[*(self
.ctx
.scope_stack
.last()
.expect("No current scope found"))]
.id,
Range::from(alias),
)),
typing_usage: None,
range: Range::from(alias),
source: Some(self.ctx.current_stmt().clone()),
context: self.ctx.execution_context(),
},
);
if self.settings.rules.enabled(&Rule::LateFutureImport)
&& !self.ctx.futures_allowed
{
self.diagnostics.push(Diagnostic::new(
pyflakes::rules::LateFutureImport,
Range::from(stmt),
));
}
} else if alias.node.name.contains('.') && alias.node.asname.is_none() {
// Given `import foo.bar`, `name` would be "foo", and `full_name` would be
// "foo.bar".
let name = alias.node.name.split('.').next().unwrap();
let full_name = &alias.node.name;
self.add_binding(
name,
Binding {
kind: BindingKind::SubmoduleImportation(name, full_name),
runtime_usage: None,
synthetic_usage: if is_handled {
Some((
self.ctx.scopes[*(self
.ctx
.scope_stack
.last()
.expect("No current scope found"))]
.id,
Range::from(alias),
))
} else {
None
},
typing_usage: None,
range: Range::from(alias),
source: Some(self.ctx.current_stmt().clone()),
context: self.ctx.execution_context(),
},
);
} else {
// Treat explicit re-export as usage (e.g., `from .applications
// import FastAPI as FastAPI`).
let is_explicit_reexport = alias
.node
.asname
.as_ref()
.map_or(false, |asname| asname == &alias.node.name);
// Given `import foo`, `name` and `full_name` would both be `foo`.
// Given `import foo as bar`, `name` would be `bar` and `full_name` would
// be `foo`.
let name = alias.node.asname.as_ref().unwrap_or(&alias.node.name);
let full_name = &alias.node.name;
self.add_binding(
name,
Binding {
kind: BindingKind::Importation(name, full_name),
runtime_usage: None,
synthetic_usage: if is_handled || is_explicit_reexport {
Some((
self.ctx.scopes[*(self
.ctx
.scope_stack
.last()
.expect("No current scope found"))]
.id,
Range::from(alias),
))
} else {
None
},
typing_usage: None,
range: Range::from(alias),
source: Some(self.ctx.current_stmt().clone()),
context: self.ctx.execution_context(),
},
);
if let Some(asname) = &alias.node.asname {
self.check_builtin_shadowing(asname, stmt, false);
}
}
// flake8-debugger
if self.settings.rules.enabled(&Rule::Debugger) {
if let Some(diagnostic) =
flake8_debugger::rules::debugger_import(stmt, None, &alias.node.name)
{
self.diagnostics.push(diagnostic);
}
}
// flake8_tidy_imports
if self.settings.rules.enabled(&Rule::BannedApi) {
if let Some(diagnostic) =
flake8_tidy_imports::banned_api::name_or_parent_is_banned(
alias,
&alias.node.name,
&self.settings.flake8_tidy_imports.banned_api,
)
{
self.diagnostics.push(diagnostic);
}
}
// pylint
if self.settings.rules.enabled(&Rule::UselessImportAlias) {
pylint::rules::useless_import_alias(self, alias);
}
if self.settings.rules.enabled(&Rule::ConsiderUsingFromImport) {
pylint::rules::use_from_import(self, stmt, alias, names);
}
if let Some(asname) = &alias.node.asname {
let name = alias.node.name.split('.').last().unwrap();
if self
.settings
.rules
.enabled(&Rule::ConstantImportedAsNonConstant)
{
if let Some(diagnostic) =
pep8_naming::rules::constant_imported_as_non_constant(
stmt,
name,
asname,