diff --git a/crates/ruff/src/rules/flake8_bandit/rules/bad_file_permissions.rs b/crates/ruff/src/rules/flake8_bandit/rules/bad_file_permissions.rs
index e529f25c15..38a5b5d29e 100644
--- a/crates/ruff/src/rules/flake8_bandit/rules/bad_file_permissions.rs
+++ b/crates/ruff/src/rules/flake8_bandit/rules/bad_file_permissions.rs
@@ -5,7 +5,8 @@ use rustpython_parser::ast::{Constant, Expr, ExprKind, Keyword, Operator};
 
 use ruff_diagnostics::{Diagnostic, Violation};
 use ruff_macros::{derive_message_formats, violation};
-use ruff_python_ast::helpers::{compose_call_path, SimpleCallArgs};
+use ruff_python_ast::call_path::compose_call_path;
+use ruff_python_ast::helpers::SimpleCallArgs;
 use ruff_python_ast::types::Range;
 
 use crate::checkers::ast::Checker;
diff --git a/crates/ruff/src/rules/flake8_boolean_trap/rules.rs b/crates/ruff/src/rules/flake8_boolean_trap/rules.rs
index 4d673ca034..671a5a0be6 100644
--- a/crates/ruff/src/rules/flake8_boolean_trap/rules.rs
+++ b/crates/ruff/src/rules/flake8_boolean_trap/rules.rs
@@ -3,7 +3,7 @@ use rustpython_parser::ast::{Arguments, Constant, Expr, ExprKind};
 use ruff_diagnostics::Violation;
 use ruff_diagnostics::{Diagnostic, DiagnosticKind};
 use ruff_macros::{derive_message_formats, violation};
-use ruff_python_ast::helpers::collect_call_path;
+use ruff_python_ast::call_path::collect_call_path;
 use ruff_python_ast::types::Range;
 
 use crate::checkers::ast::Checker;
diff --git a/crates/ruff/src/rules/flake8_bugbear/rules/duplicate_exceptions.rs b/crates/ruff/src/rules/flake8_bugbear/rules/duplicate_exceptions.rs
index 630928f56d..3ec998b2fe 100644
--- a/crates/ruff/src/rules/flake8_bugbear/rules/duplicate_exceptions.rs
+++ b/crates/ruff/src/rules/flake8_bugbear/rules/duplicate_exceptions.rs
@@ -7,9 +7,10 @@ use rustpython_parser::ast::{
 use ruff_diagnostics::{AlwaysAutofixableViolation, Violation};
 use ruff_diagnostics::{Diagnostic, Edit};
 use ruff_macros::{derive_message_formats, violation};
-use ruff_python_ast::helpers;
+use ruff_python_ast::call_path;
+use ruff_python_ast::call_path::CallPath;
 use ruff_python_ast::helpers::unparse_expr;
-use ruff_python_ast::types::{CallPath, Range};
+use ruff_python_ast::types::Range;
 
 use crate::checkers::ast::Checker;
 use crate::registry::{AsRule, Rule};
@@ -69,7 +70,7 @@ fn duplicate_handler_exceptions<'a>(
     let mut duplicates: FxHashSet<CallPath> = FxHashSet::default();
     let mut unique_elts: Vec<&Expr> = Vec::default();
     for type_ in elts {
-        let call_path = helpers::collect_call_path(type_);
+        let call_path = call_path::collect_call_path(type_);
         if !call_path.is_empty() {
             if seen.contains_key(&call_path) {
                 duplicates.insert(call_path);
@@ -124,7 +125,7 @@ pub fn duplicate_exceptions(checker: &mut Checker, handlers: &[Excepthandler]) {
         };
         match &type_.node {
             ExprKind::Attribute { .. } | ExprKind::Name { .. } => {
-                let call_path = helpers::collect_call_path(type_);
+                let call_path = call_path::collect_call_path(type_);
                 if !call_path.is_empty() {
                     if seen.contains(&call_path) {
                         duplicates.entry(call_path).or_default().push(type_);
diff --git a/crates/ruff/src/rules/flake8_bugbear/rules/function_call_argument_default.rs b/crates/ruff/src/rules/flake8_bugbear/rules/function_call_argument_default.rs
index 7de79ee843..b3d40e6bc9 100644
--- a/crates/ruff/src/rules/flake8_bugbear/rules/function_call_argument_default.rs
+++ b/crates/ruff/src/rules/flake8_bugbear/rules/function_call_argument_default.rs
@@ -3,8 +3,9 @@ use rustpython_parser::ast::{Arguments, Constant, Expr, ExprKind};
 use ruff_diagnostics::Violation;
 use ruff_diagnostics::{Diagnostic, DiagnosticKind};
 use ruff_macros::{derive_message_formats, violation};
-use ruff_python_ast::helpers::{compose_call_path, to_call_path};
-use ruff_python_ast::types::{CallPath, Range};
+use ruff_python_ast::call_path::to_call_path;
+use ruff_python_ast::call_path::{compose_call_path, CallPath};
+use ruff_python_ast::types::Range;
 use ruff_python_ast::visitor;
 use ruff_python_ast::visitor::Visitor;
 
diff --git a/crates/ruff/src/rules/flake8_debugger/rules.rs b/crates/ruff/src/rules/flake8_debugger/rules.rs
index 5a49463e0d..0818150662 100644
--- a/crates/ruff/src/rules/flake8_debugger/rules.rs
+++ b/crates/ruff/src/rules/flake8_debugger/rules.rs
@@ -2,7 +2,7 @@ use rustpython_parser::ast::{Expr, Stmt};
 
 use ruff_diagnostics::{Diagnostic, Violation};
 use ruff_macros::{derive_message_formats, violation};
-use ruff_python_ast::helpers::format_call_path;
+use ruff_python_ast::call_path::format_call_path;
 use ruff_python_ast::types::Range;
 
 use crate::checkers::ast::Checker;
diff --git a/crates/ruff/src/rules/flake8_django/rules/helpers.rs b/crates/ruff/src/rules/flake8_django/rules/helpers.rs
index 34069d11b9..60f7c1c32a 100644
--- a/crates/ruff/src/rules/flake8_django/rules/helpers.rs
+++ b/crates/ruff/src/rules/flake8_django/rules/helpers.rs
@@ -1,6 +1,7 @@
-use ruff_python_ast::context::Context;
 use rustpython_parser::ast::Expr;
 
+use ruff_python_ast::context::Context;
+
 /// Return `true` if a Python class appears to be a Django model, based on its base classes.
 pub fn is_model(context: &Context, base: &Expr) -> bool {
     context.resolve_call_path(base).map_or(false, |call_path| {
diff --git a/crates/ruff/src/rules/flake8_django/rules/non_leading_receiver_decorator.rs b/crates/ruff/src/rules/flake8_django/rules/non_leading_receiver_decorator.rs
index 20888318d4..813b9ac4b5 100644
--- a/crates/ruff/src/rules/flake8_django/rules/non_leading_receiver_decorator.rs
+++ b/crates/ruff/src/rules/flake8_django/rules/non_leading_receiver_decorator.rs
@@ -2,7 +2,8 @@ use rustpython_parser::ast::{Expr, ExprKind};
 
 use ruff_diagnostics::{Diagnostic, Violation};
 use ruff_macros::{derive_message_formats, violation};
-use ruff_python_ast::types::{CallPath, Range};
+use ruff_python_ast::call_path::CallPath;
+use ruff_python_ast::types::Range;
 
 /// ## What it does
 /// Checks that Django's `@receiver` decorator is listed first, prior to
diff --git a/crates/ruff/src/rules/flake8_django/rules/unordered_body_content_in_model.rs b/crates/ruff/src/rules/flake8_django/rules/unordered_body_content_in_model.rs
index ebefddf9f1..efec15141e 100644
--- a/crates/ruff/src/rules/flake8_django/rules/unordered_body_content_in_model.rs
+++ b/crates/ruff/src/rules/flake8_django/rules/unordered_body_content_in_model.rs
@@ -1,9 +1,10 @@
 use std::fmt;
 
+use rustpython_parser::ast::{Expr, ExprKind, Stmt, StmtKind};
+
 use ruff_diagnostics::{Diagnostic, Violation};
 use ruff_macros::{derive_message_formats, violation};
 use ruff_python_ast::types::Range;
-use rustpython_parser::ast::{Expr, ExprKind, Stmt, StmtKind};
 
 use crate::checkers::ast::Checker;
 
diff --git a/crates/ruff/src/rules/flake8_pytest_style/rules/fixture.rs b/crates/ruff/src/rules/flake8_pytest_style/rules/fixture.rs
index 2a6b8abe24..17f929ff50 100644
--- a/crates/ruff/src/rules/flake8_pytest_style/rules/fixture.rs
+++ b/crates/ruff/src/rules/flake8_pytest_style/rules/fixture.rs
@@ -4,7 +4,8 @@ use rustpython_parser::ast::{Arguments, Expr, ExprKind, Keyword, Location, Stmt,
 use ruff_diagnostics::{AlwaysAutofixableViolation, Violation};
 use ruff_diagnostics::{Diagnostic, Edit};
 use ruff_macros::{derive_message_formats, violation};
-use ruff_python_ast::helpers::{collect_arg_names, collect_call_path};
+use ruff_python_ast::call_path::collect_call_path;
+use ruff_python_ast::helpers::collect_arg_names;
 use ruff_python_ast::source_code::Locator;
 use ruff_python_ast::types::Range;
 use ruff_python_ast::visitor;
diff --git a/crates/ruff/src/rules/flake8_pytest_style/rules/helpers.rs b/crates/ruff/src/rules/flake8_pytest_style/rules/helpers.rs
index 007f9f5de5..79820f7ae4 100644
--- a/crates/ruff/src/rules/flake8_pytest_style/rules/helpers.rs
+++ b/crates/ruff/src/rules/flake8_pytest_style/rules/helpers.rs
@@ -1,7 +1,8 @@
 use num_traits::identities::Zero;
+use ruff_python_ast::call_path::collect_call_path;
 use rustpython_parser::ast::{Constant, Expr, ExprKind, Keyword};
 
-use ruff_python_ast::helpers::{collect_call_path, map_callable};
+use ruff_python_ast::helpers::map_callable;
 
 use crate::checkers::ast::Checker;
 
diff --git a/crates/ruff/src/rules/flake8_pytest_style/rules/patch.rs b/crates/ruff/src/rules/flake8_pytest_style/rules/patch.rs
index fbb2bfeafc..d992df5728 100644
--- a/crates/ruff/src/rules/flake8_pytest_style/rules/patch.rs
+++ b/crates/ruff/src/rules/flake8_pytest_style/rules/patch.rs
@@ -3,7 +3,8 @@ use rustpython_parser::ast::{Expr, ExprKind, Keyword};
 
 use ruff_diagnostics::{Diagnostic, Violation};
 use ruff_macros::{derive_message_formats, violation};
-use ruff_python_ast::helpers::{collect_arg_names, compose_call_path, SimpleCallArgs};
+use ruff_python_ast::call_path::compose_call_path;
+use ruff_python_ast::helpers::{collect_arg_names, SimpleCallArgs};
 use ruff_python_ast::types::Range;
 use ruff_python_ast::visitor;
 use ruff_python_ast::visitor::Visitor;
diff --git a/crates/ruff/src/rules/flake8_pytest_style/rules/raises.rs b/crates/ruff/src/rules/flake8_pytest_style/rules/raises.rs
index ab88368d17..b03075744e 100644
--- a/crates/ruff/src/rules/flake8_pytest_style/rules/raises.rs
+++ b/crates/ruff/src/rules/flake8_pytest_style/rules/raises.rs
@@ -2,7 +2,8 @@ use rustpython_parser::ast::{Expr, ExprKind, Keyword, Stmt, StmtKind, Withitem};
 
 use ruff_diagnostics::{Diagnostic, Violation};
 use ruff_macros::{derive_message_formats, violation};
-use ruff_python_ast::helpers::{format_call_path, to_call_path};
+use ruff_python_ast::call_path::format_call_path;
+use ruff_python_ast::call_path::to_call_path;
 use ruff_python_ast::types::Range;
 
 use crate::checkers::ast::Checker;
diff --git a/crates/ruff/src/rules/flake8_self/rules/private_member_access.rs b/crates/ruff/src/rules/flake8_self/rules/private_member_access.rs
index 9d1300f75e..1b600dcaa5 100644
--- a/crates/ruff/src/rules/flake8_self/rules/private_member_access.rs
+++ b/crates/ruff/src/rules/flake8_self/rules/private_member_access.rs
@@ -2,7 +2,7 @@ use rustpython_parser::ast::{Expr, ExprKind};
 
 use ruff_diagnostics::{Diagnostic, Violation};
 use ruff_macros::{derive_message_formats, violation};
-use ruff_python_ast::helpers::collect_call_path;
+use ruff_python_ast::call_path::collect_call_path;
 use ruff_python_ast::scope::ScopeKind;
 use ruff_python_ast::types::Range;
 
diff --git a/crates/ruff/src/rules/flake8_simplify/rules/suppressible_exception.rs b/crates/ruff/src/rules/flake8_simplify/rules/suppressible_exception.rs
index c48e38d708..4118b74d8e 100644
--- a/crates/ruff/src/rules/flake8_simplify/rules/suppressible_exception.rs
+++ b/crates/ruff/src/rules/flake8_simplify/rules/suppressible_exception.rs
@@ -2,8 +2,8 @@ use rustpython_parser::ast::{Excepthandler, ExcepthandlerKind, Located, Stmt, St
 
 use ruff_diagnostics::{Diagnostic, Violation};
 use ruff_macros::{derive_message_formats, violation};
+use ruff_python_ast::call_path::compose_call_path;
 use ruff_python_ast::helpers;
-use ruff_python_ast::helpers::compose_call_path;
 use ruff_python_ast::types::Range;
 
 use crate::checkers::ast::Checker;
diff --git a/crates/ruff/src/rules/flake8_tidy_imports/banned_api.rs b/crates/ruff/src/rules/flake8_tidy_imports/banned_api.rs
index eba8c682a7..69348ad8ed 100644
--- a/crates/ruff/src/rules/flake8_tidy_imports/banned_api.rs
+++ b/crates/ruff/src/rules/flake8_tidy_imports/banned_api.rs
@@ -5,7 +5,8 @@ use serde::{Deserialize, Serialize};
 
 use ruff_diagnostics::{Diagnostic, Violation};
 use ruff_macros::{derive_message_formats, violation, CacheKey};
-use ruff_python_ast::types::{CallPath, Range};
+use ruff_python_ast::call_path::CallPath;
+use ruff_python_ast::types::Range;
 
 use crate::checkers::ast::Checker;
 
diff --git a/crates/ruff/src/rules/flake8_type_checking/helpers.rs b/crates/ruff/src/rules/flake8_type_checking/helpers.rs
index 3d43af3ae9..51cc28f305 100644
--- a/crates/ruff/src/rules/flake8_type_checking/helpers.rs
+++ b/crates/ruff/src/rules/flake8_type_checking/helpers.rs
@@ -2,8 +2,9 @@ use num_traits::Zero;
 use rustpython_parser::ast::{Constant, Expr, ExprKind};
 
 use ruff_python_ast::binding::{Binding, BindingKind, ExecutionContext};
+use ruff_python_ast::call_path::to_call_path;
 use ruff_python_ast::context::Context;
-use ruff_python_ast::helpers::{map_callable, to_call_path};
+use ruff_python_ast::helpers::map_callable;
 use ruff_python_ast::scope::ScopeKind;
 
 /// Return `true` if [`Expr`] is a guard for a type-checking block.
diff --git a/crates/ruff/src/rules/pydocstyle/helpers.rs b/crates/ruff/src/rules/pydocstyle/helpers.rs
index aa3aabf544..5d14b52c90 100644
--- a/crates/ruff/src/rules/pydocstyle/helpers.rs
+++ b/crates/ruff/src/rules/pydocstyle/helpers.rs
@@ -1,7 +1,8 @@
+use ruff_python_ast::call_path::to_call_path;
 use std::collections::BTreeSet;
 
 use ruff_python_ast::cast;
-use ruff_python_ast::helpers::{map_callable, to_call_path};
+use ruff_python_ast::helpers::map_callable;
 use ruff_python_ast::newlines::StrExt;
 use ruff_python_ast::str::is_implicit_concatenation;
 
diff --git a/crates/ruff/src/rules/pydocstyle/rules/capitalized.rs b/crates/ruff/src/rules/pydocstyle/rules/capitalized.rs
index d46203c5a1..da67fd7d2b 100644
--- a/crates/ruff/src/rules/pydocstyle/rules/capitalized.rs
+++ b/crates/ruff/src/rules/pydocstyle/rules/capitalized.rs
@@ -1,8 +1,9 @@
+use unicode_width::UnicodeWidthStr;
+
 use ruff_diagnostics::{AlwaysAutofixableViolation, Diagnostic, Edit};
 use ruff_macros::{derive_message_formats, violation};
 use ruff_python_ast::str::leading_quote;
 use ruff_python_ast::types::Range;
-use unicode_width::UnicodeWidthStr;
 
 use crate::checkers::ast::Checker;
 use crate::docstrings::definition::{DefinitionKind, Docstring};
diff --git a/crates/ruff/src/rules/pydocstyle/rules/non_imperative_mood.rs b/crates/ruff/src/rules/pydocstyle/rules/non_imperative_mood.rs
index df9a4c9563..e25652f1dc 100644
--- a/crates/ruff/src/rules/pydocstyle/rules/non_imperative_mood.rs
+++ b/crates/ruff/src/rules/pydocstyle/rules/non_imperative_mood.rs
@@ -5,10 +5,10 @@ use once_cell::sync::Lazy;
 
 use ruff_diagnostics::{Diagnostic, Violation};
 use ruff_macros::{derive_message_formats, violation};
+use ruff_python_ast::call_path::{to_call_path, CallPath};
 use ruff_python_ast::cast;
-use ruff_python_ast::helpers::to_call_path;
 use ruff_python_ast::newlines::StrExt;
-use ruff_python_ast::types::{CallPath, Range};
+use ruff_python_ast::types::Range;
 use ruff_python_ast::visibility::{is_property, is_test};
 
 use crate::checkers::ast::Checker;
diff --git a/crates/ruff/src/rules/pyupgrade/rules/datetime_utc_alias.rs b/crates/ruff/src/rules/pyupgrade/rules/datetime_utc_alias.rs
index 9dd838f229..06deb05d7a 100644
--- a/crates/ruff/src/rules/pyupgrade/rules/datetime_utc_alias.rs
+++ b/crates/ruff/src/rules/pyupgrade/rules/datetime_utc_alias.rs
@@ -2,7 +2,7 @@ use rustpython_parser::ast::Expr;
 
 use ruff_diagnostics::{AutofixKind, Diagnostic, Edit, Violation};
 use ruff_macros::{derive_message_formats, violation};
-use ruff_python_ast::helpers::collect_call_path;
+use ruff_python_ast::call_path::collect_call_path;
 use ruff_python_ast::types::Range;
 
 use crate::checkers::ast::Checker;
diff --git a/crates/ruff/src/rules/pyupgrade/rules/deprecated_mock_import.rs b/crates/ruff/src/rules/pyupgrade/rules/deprecated_mock_import.rs
index 174c49bf40..a86d69673f 100644
--- a/crates/ruff/src/rules/pyupgrade/rules/deprecated_mock_import.rs
+++ b/crates/ruff/src/rules/pyupgrade/rules/deprecated_mock_import.rs
@@ -8,7 +8,7 @@ use rustpython_parser::ast::{Expr, ExprKind, Stmt, StmtKind};
 
 use ruff_diagnostics::{AlwaysAutofixableViolation, Diagnostic, Edit};
 use ruff_macros::{derive_message_formats, violation};
-use ruff_python_ast::helpers::collect_call_path;
+use ruff_python_ast::call_path::collect_call_path;
 use ruff_python_ast::source_code::{Locator, Stylist};
 use ruff_python_ast::types::Range;
 use ruff_python_ast::whitespace::indentation;
diff --git a/crates/ruff/src/rules/pyupgrade/rules/os_error_alias.rs b/crates/ruff/src/rules/pyupgrade/rules/os_error_alias.rs
index f1574115e8..e47d51161e 100644
--- a/crates/ruff/src/rules/pyupgrade/rules/os_error_alias.rs
+++ b/crates/ruff/src/rules/pyupgrade/rules/os_error_alias.rs
@@ -2,8 +2,9 @@ use rustpython_parser::ast::{Excepthandler, ExcepthandlerKind, Expr, ExprContext
 
 use ruff_diagnostics::{AlwaysAutofixableViolation, Diagnostic, Edit};
 use ruff_macros::{derive_message_formats, violation};
+use ruff_python_ast::call_path::compose_call_path;
 use ruff_python_ast::context::Context;
-use ruff_python_ast::helpers::{compose_call_path, create_expr, unparse_expr};
+use ruff_python_ast::helpers::{create_expr, unparse_expr};
 use ruff_python_ast::types::Range;
 
 use crate::checkers::ast::Checker;
diff --git a/crates/ruff/src/rules/ruff/rules/asyncio_dangling_task.rs b/crates/ruff/src/rules/ruff/rules/asyncio_dangling_task.rs
index 90a9bb9a56..07deed868e 100644
--- a/crates/ruff/src/rules/ruff/rules/asyncio_dangling_task.rs
+++ b/crates/ruff/src/rules/ruff/rules/asyncio_dangling_task.rs
@@ -4,7 +4,8 @@ use rustpython_parser::ast::{Expr, ExprKind};
 
 use ruff_diagnostics::{Diagnostic, Violation};
 use ruff_macros::{derive_message_formats, violation};
-use ruff_python_ast::types::{CallPath, Range};
+use ruff_python_ast::call_path::CallPath;
+use ruff_python_ast::types::Range;
 
 /// ## What it does
 /// Checks for `asyncio.create_task` and `asyncio.ensure_future` calls
diff --git a/crates/ruff_python_ast/src/call_path.rs b/crates/ruff_python_ast/src/call_path.rs
new file mode 100644
index 0000000000..59b4d56c9a
--- /dev/null
+++ b/crates/ruff_python_ast/src/call_path.rs
@@ -0,0 +1,63 @@
+use rustpython_parser::ast::{Expr, ExprKind};
+use smallvec::smallvec;
+
+/// A representation of a qualified name, like `typing.List`.
+pub type CallPath<'a> = smallvec::SmallVec<[&'a str; 8]>;
+
+fn collect_call_path_inner<'a>(expr: &'a Expr, parts: &mut CallPath<'a>) -> bool {
+    match &expr.node {
+        ExprKind::Attribute { value, attr, .. } => {
+            if collect_call_path_inner(value, parts) {
+                parts.push(attr);
+                true
+            } else {
+                false
+            }
+        }
+        ExprKind::Name { id, .. } => {
+            parts.push(id);
+            true
+        }
+        _ => false,
+    }
+}
+
+/// Convert an `Expr` to its [`CallPath`] segments (like `["typing", "List"]`).
+pub fn collect_call_path(expr: &Expr) -> CallPath {
+    let mut segments = smallvec![];
+    collect_call_path_inner(expr, &mut segments);
+    segments
+}
+
+/// Convert an `Expr` to its call path (like `List`, or `typing.List`).
+pub fn compose_call_path(expr: &Expr) -> Option<String> {
+    let call_path = collect_call_path(expr);
+    if call_path.is_empty() {
+        None
+    } else {
+        Some(format_call_path(&call_path))
+    }
+}
+
+/// Format a call path for display.
+pub fn format_call_path(call_path: &[&str]) -> String {
+    if call_path
+        .first()
+        .expect("Unable to format empty call path")
+        .is_empty()
+    {
+        call_path[1..].join(".")
+    } else {
+        call_path.join(".")
+    }
+}
+
+/// Split a fully-qualified name (like `typing.List`) into (`typing`, `List`).
+pub fn to_call_path(target: &str) -> CallPath {
+    if target.contains('.') {
+        target.split('.').collect()
+    } else {
+        // Special-case: for builtins, return `["", "int"]` instead of `["int"]`.
+        smallvec!["", target]
+    }
+}
diff --git a/crates/ruff_python_ast/src/comparable.rs b/crates/ruff_python_ast/src/comparable.rs
index 98a8c2d5cb..3ddad10a94 100644
--- a/crates/ruff_python_ast/src/comparable.rs
+++ b/crates/ruff_python_ast/src/comparable.rs
@@ -1,14 +1,13 @@
 //! An equivalent object hierarchy to the [`Expr`] hierarchy, but with the
 //! ability to compare expressions for equality (via [`Eq`] and [`Hash`]).
 
+use num_bigint::BigInt;
 use rustpython_parser::ast::{
     Alias, Arg, Arguments, Boolop, Cmpop, Comprehension, Constant, Excepthandler,
     ExcepthandlerKind, Expr, ExprContext, ExprKind, Keyword, MatchCase, Operator, Pattern,
     PatternKind, Stmt, StmtKind, Unaryop, Withitem,
 };
 
-use num_bigint::BigInt;
-
 #[derive(Debug, PartialEq, Eq, Hash, Copy, Clone)]
 pub enum ComparableExprContext {
     Load,
diff --git a/crates/ruff_python_ast/src/context.rs b/crates/ruff_python_ast/src/context.rs
index 49f79ebd37..cba1617889 100644
--- a/crates/ruff_python_ast/src/context.rs
+++ b/crates/ruff_python_ast/src/context.rs
@@ -12,9 +12,10 @@ use crate::binding::{
     Binding, BindingId, BindingKind, Bindings, Exceptions, ExecutionContext, FromImportation,
     Importation, SubmoduleImportation,
 };
-use crate::helpers::{collect_call_path, from_relative_import};
+use crate::call_path::{collect_call_path, CallPath};
+use crate::helpers::from_relative_import;
 use crate::scope::{Scope, ScopeId, ScopeKind, ScopeStack, Scopes};
-use crate::types::{CallPath, RefEquality};
+use crate::types::RefEquality;
 use crate::typing::AnnotationKind;
 use crate::visibility::{module_visibility, Modifier, VisibleScope};
 
diff --git a/crates/ruff_python_ast/src/function_type.rs b/crates/ruff_python_ast/src/function_type.rs
index 9c3b88ffd5..df60e3b32e 100644
--- a/crates/ruff_python_ast/src/function_type.rs
+++ b/crates/ruff_python_ast/src/function_type.rs
@@ -1,7 +1,8 @@
 use rustpython_parser::ast::Expr;
 
+use crate::call_path::to_call_path;
 use crate::context::Context;
-use crate::helpers::{map_callable, to_call_path};
+use crate::helpers::map_callable;
 use crate::scope::{Scope, ScopeKind};
 
 const CLASS_METHODS: [&str; 3] = ["__new__", "__init_subclass__", "__class_getitem__"];
diff --git a/crates/ruff_python_ast/src/helpers.rs b/crates/ruff_python_ast/src/helpers.rs
index 3da832a020..7c0f301362 100644
--- a/crates/ruff_python_ast/src/helpers.rs
+++ b/crates/ruff_python_ast/src/helpers.rs
@@ -10,11 +10,12 @@ use rustpython_parser::ast::{
     KeywordData, Located, Location, MatchCase, Pattern, PatternKind, Stmt, StmtKind,
 };
 use rustpython_parser::{lexer, Mode, Tok};
-use smallvec::{smallvec, SmallVec};
+use smallvec::SmallVec;
 
+use crate::call_path::CallPath;
 use crate::context::Context;
 use crate::source_code::{Generator, Indexer, Locator, Stylist};
-use crate::types::{CallPath, Range};
+use crate::types::Range;
 use crate::visitor;
 use crate::visitor::Visitor;
 
@@ -49,54 +50,6 @@ pub fn unparse_constant(constant: &Constant, stylist: &Stylist) -> String {
     generator.generate()
 }
 
-fn collect_call_path_inner<'a>(expr: &'a Expr, parts: &mut CallPath<'a>) -> bool {
-    match &expr.node {
-        ExprKind::Attribute { value, attr, .. } => {
-            if collect_call_path_inner(value, parts) {
-                parts.push(attr);
-                true
-            } else {
-                false
-            }
-        }
-        ExprKind::Name { id, .. } => {
-            parts.push(id);
-            true
-        }
-        _ => false,
-    }
-}
-
-/// Convert an `Expr` to its [`CallPath`] segments (like `["typing", "List"]`).
-pub fn collect_call_path(expr: &Expr) -> CallPath {
-    let mut segments = smallvec![];
-    collect_call_path_inner(expr, &mut segments);
-    segments
-}
-
-/// Convert an `Expr` to its call path (like `List`, or `typing.List`).
-pub fn compose_call_path(expr: &Expr) -> Option<String> {
-    let call_path = collect_call_path(expr);
-    if call_path.is_empty() {
-        None
-    } else {
-        Some(format_call_path(&call_path))
-    }
-}
-
-/// Format a call path for display.
-pub fn format_call_path(call_path: &[&str]) -> String {
-    if call_path
-        .first()
-        .expect("Unable to format empty call path")
-        .is_empty()
-    {
-        call_path[1..].join(".")
-    } else {
-        call_path.join(".")
-    }
-}
-
 /// Return `true` if the `Expr` contains a reference to `${module}.${target}`.
 pub fn contains_call_path(ctx: &Context, expr: &Expr, target: &[&str]) -> bool {
     any_over_expr(expr, &|expr| {
@@ -748,15 +701,6 @@ pub fn format_import_from_member(
     full_name
 }
 
-/// Split a target string (like `typing.List`) into (`typing`, `List`).
-pub fn to_call_path(target: &str) -> CallPath {
-    if target.contains('.') {
-        target.split('.').collect()
-    } else {
-        smallvec!["", target]
-    }
-}
-
 /// Create a module path from a (package, path) pair.
 ///
 /// For example, if the package is `foo/bar` and the path is `foo/bar/baz.py`,
diff --git a/crates/ruff_python_ast/src/lib.rs b/crates/ruff_python_ast/src/lib.rs
index 07f0505658..65d810962a 100644
--- a/crates/ruff_python_ast/src/lib.rs
+++ b/crates/ruff_python_ast/src/lib.rs
@@ -1,6 +1,7 @@
 pub mod all;
 pub mod binding;
 pub mod branch_detection;
+pub mod call_path;
 pub mod cast;
 pub mod comparable;
 pub mod context;
diff --git a/crates/ruff_python_ast/src/logging.rs b/crates/ruff_python_ast/src/logging.rs
index 7d3d57383b..35e93eca7e 100644
--- a/crates/ruff_python_ast/src/logging.rs
+++ b/crates/ruff_python_ast/src/logging.rs
@@ -1,7 +1,8 @@
-use crate::context::Context;
-use crate::helpers::collect_call_path;
 use rustpython_parser::ast::{Expr, ExprKind};
 
+use crate::call_path::collect_call_path;
+use crate::context::Context;
+
 #[derive(Copy, Clone)]
 pub enum LoggingLevel {
     Debug,
diff --git a/crates/ruff_python_ast/src/source_code/locator.rs b/crates/ruff_python_ast/src/source_code/locator.rs
index 2bfd291659..ca177ee89b 100644
--- a/crates/ruff_python_ast/src/source_code/locator.rs
+++ b/crates/ruff_python_ast/src/source_code/locator.rs
@@ -208,9 +208,10 @@ impl Utf8Index {
 
 #[cfg(test)]
 mod tests {
-    use crate::source_code::locator::{AsciiIndex, Index, Utf8Index};
     use rustpython_parser::ast::Location;
 
+    use crate::source_code::locator::{AsciiIndex, Index, Utf8Index};
+
     fn index_ascii(content: &str) -> AsciiIndex {
         match Index::from(content) {
             Index::Ascii(ascii) => ascii,
diff --git a/crates/ruff_python_ast/src/source_code/stylist.rs b/crates/ruff_python_ast/src/source_code/stylist.rs
index bef99db2bd..31735a86cf 100644
--- a/crates/ruff_python_ast/src/source_code/stylist.rs
+++ b/crates/ruff_python_ast/src/source_code/stylist.rs
@@ -8,9 +8,9 @@ use rustpython_parser::ast::Location;
 use rustpython_parser::lexer::LexResult;
 use rustpython_parser::Tok;
 
-use crate::source_code::Locator;
 use ruff_rustpython::vendor;
 
+use crate::source_code::Locator;
 use crate::str::leading_quote;
 use crate::types::Range;
 
@@ -213,11 +213,12 @@ fn detect_line_ending(contents: &str) -> Option<LineEnding> {
 
 #[cfg(test)]
 mod tests {
-    use crate::source_code::stylist::{detect_line_ending, Indentation, LineEnding, Quote};
-    use crate::source_code::{Locator, Stylist};
     use rustpython_parser::lexer::lex;
     use rustpython_parser::Mode;
 
+    use crate::source_code::stylist::{detect_line_ending, Indentation, LineEnding, Quote};
+    use crate::source_code::{Locator, Stylist};
+
     #[test]
     fn indentation() {
         let contents = r#"x = 1"#;
diff --git a/crates/ruff_python_ast/src/types.rs b/crates/ruff_python_ast/src/types.rs
index 4af5670d5a..466c95fe41 100644
--- a/crates/ruff_python_ast/src/types.rs
+++ b/crates/ruff_python_ast/src/types.rs
@@ -97,5 +97,3 @@ impl<'a> From<&RefEquality<'a, Expr>> for &'a Expr {
         r.0
     }
 }
-
-pub type CallPath<'a> = smallvec::SmallVec<[&'a str; 8]>;
diff --git a/crates/ruff_python_ast/src/visibility.rs b/crates/ruff_python_ast/src/visibility.rs
index 7ba1f18d9f..1b596b6479 100644
--- a/crates/ruff_python_ast/src/visibility.rs
+++ b/crates/ruff_python_ast/src/visibility.rs
@@ -2,9 +2,10 @@ use std::path::Path;
 
 use rustpython_parser::ast::{Expr, Stmt, StmtKind};
 
+use crate::call_path::collect_call_path;
+use crate::call_path::CallPath;
 use crate::context::Context;
-use crate::helpers::{collect_call_path, map_callable};
-use crate::types::CallPath;
+use crate::helpers::map_callable;
 
 #[derive(Debug, Clone, Copy)]
 pub enum Modifier {