lint: [move-only] Move python related lints to lint_py.rs

diff --git a/test/lint/test_runner/src/lint_py.rs b/test/lint/test_runner/src/lint_py.rs
new file mode 100644
index 00000000..d9177c86
--- /dev/null
+++ b/test/lint/test_runner/src/lint_py.rs
@@ -0,0 +1,75 @@
+// Copyright (c) The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or https://opensource.org/license/mit/.
+
+use std::io::ErrorKind;
+use std::process::Command;
+
+use crate::util::{check_output, get_pathspecs_default_excludes, git, LintResult};
+
+pub fn lint_py_lint() -> LintResult {
+    let bin_name = "ruff";
+    let checks = format!(
+        "--select={}",
+        [
+            "B006", // mutable-argument-default
+            "B008", // function-call-in-default-argument
+            "E101", // indentation contains mixed spaces and tabs
+            "E401", // multiple imports on one line
+            "E402", // module level import not at top of file
+            "E701", // multiple statements on one line (colon)
+            "E702", // multiple statements on one line (semicolon)
+            "E703", // statement ends with a semicolon
+            "E711", // comparison to None should be 'if cond is None:'
+            "E713", // test for membership should be "not in"
+            "E714", // test for object identity should be "is not"
+            "E721", // do not compare types, use "isinstance()"
+            "E722", // do not use bare 'except'
+            "E742", // do not define classes named "l", "O", or "I"
+            "E743", // do not define functions named "l", "O", or "I"
+            "F401", // module imported but unused
+            "F402", // import module from line N shadowed by loop variable
+            "F403", // 'from foo_module import *' used; unable to detect undefined names
+            "F404", // future import(s) name after other statements
+            "F405", // foo_function may be undefined, or defined from star imports: bar_module
+            "F406", // "from module import *" only allowed at module level
+            "F407", // an undefined __future__ feature name was imported
+            "F541", // f-string without any placeholders
+            "F601", // dictionary key name repeated with different values
+            "F602", // dictionary key variable name repeated with different values
+            "F621", // too many expressions in an assignment with star-unpacking
+            "F631", // assertion test is a tuple, which are always True
+            "F632", // use ==/!= to compare str, bytes, and int literals
+            "F811", // redefinition of unused name from line N
+            "F821", // undefined name 'Foo'
+            "F822", // undefined name name in __all__
+            "F823", // local variable name … referenced before assignment
+            "F841", // local variable 'foo' is assigned to but never used
+            "PLE",  // Pylint errors
+            "W191", // indentation contains tabs
+            "W291", // trailing whitespace
+            "W292", // no newline at end of file
+            "W293", // blank line contains whitespace
+            "W605", // invalid escape sequence "x"
+        ]
+        .join(",")
+    );
+    let files = check_output(
+        git()
+            .args(["ls-files", "--", "*.py"])
+            .args(get_pathspecs_default_excludes()),
+    )?;
+
+    let mut cmd = Command::new(bin_name);
+    cmd.args(["check", &checks]).args(files.lines());
+
+    match cmd.status() {
+        Ok(status) if status.success() => Ok(()),
+        Ok(_) => Err(format!("`{bin_name}` found errors!")),
+        Err(e) if e.kind() == ErrorKind::NotFound => {
+            println!("`{bin_name}` was not found in $PATH, skipping those checks.");
+            Ok(())
+        }
+        Err(e) => Err(format!("Error running `{bin_name}`: {e}")),
+    }
+}
diff --git a/test/lint/test_runner/src/main.rs b/test/lint/test_runner/src/main.rs
index ba774238..fa69d2b5 100644
--- a/test/lint/test_runner/src/main.rs
+++ b/test/lint/test_runner/src/main.rs
@@ -4,27 +4,25 @@
 
 mod lint_cpp;
 mod lint_docs;
+mod lint_py;
 mod lint_repo_hygiene;
 mod lint_text_format;
 mod util;
 
 use std::env;
 use std::fs;
-use std::io::ErrorKind;
 use std::process::{Command, ExitCode};
 
 use lint_cpp::{
     lint_boost_assert, lint_includes_build_config, lint_rpc_assert, lint_std_filesystem,
 };
 use lint_docs::{lint_doc_args, lint_doc_release_note_snippets, lint_markdown};
+use lint_py::lint_py_lint;
 use lint_repo_hygiene::{lint_scripted_diff, lint_subtree};
 use lint_text_format::{
     lint_commit_msg, lint_tabs_whitespace, lint_trailing_newline, lint_trailing_whitespace,
 };
-use util::{
-    check_output, commit_range, get_git_root, get_pathspecs_default_excludes, git, LintFn,
-    LintResult,
-};
+use util::{check_output, commit_range, get_git_root, git, LintFn, LintResult};
 
 struct Linter {
     pub description: &'static str,
@@ -168,73 +166,6 @@ fn parse_lint_args(args: &[String]) -> Vec<&'static Linter> {
     lint_values
 }
 
-fn lint_py_lint() -> LintResult {
-    let bin_name = "ruff";
-    let checks = format!(
-        "--select={}",
-        [
-            "B006", // mutable-argument-default
-            "B008", // function-call-in-default-argument
-            "E101", // indentation contains mixed spaces and tabs
-            "E401", // multiple imports on one line
-            "E402", // module level import not at top of file
-            "E701", // multiple statements on one line (colon)
-            "E702", // multiple statements on one line (semicolon)
-            "E703", // statement ends with a semicolon
-            "E711", // comparison to None should be 'if cond is None:'
-            "E713", // test for membership should be "not in"
-            "E714", // test for object identity should be "is not"
-            "E721", // do not compare types, use "isinstance()"
-            "E722", // do not use bare 'except'
-            "E742", // do not define classes named "l", "O", or "I"
-            "E743", // do not define functions named "l", "O", or "I"
-            "F401", // module imported but unused
-            "F402", // import module from line N shadowed by loop variable
-            "F403", // 'from foo_module import *' used; unable to detect undefined names
-            "F404", // future import(s) name after other statements
-            "F405", // foo_function may be undefined, or defined from star imports: bar_module
-            "F406", // "from module import *" only allowed at module level
-            "F407", // an undefined __future__ feature name was imported
-            "F541", // f-string without any placeholders
-            "F601", // dictionary key name repeated with different values
-            "F602", // dictionary key variable name repeated with different values
-            "F621", // too many expressions in an assignment with star-unpacking
-            "F631", // assertion test is a tuple, which are always True
-            "F632", // use ==/!= to compare str, bytes, and int literals
-            "F811", // redefinition of unused name from line N
-            "F821", // undefined name 'Foo'
-            "F822", // undefined name name in __all__
-            "F823", // local variable name … referenced before assignment
-            "F841", // local variable 'foo' is assigned to but never used
-            "PLE",  // Pylint errors
-            "W191", // indentation contains tabs
-            "W291", // trailing whitespace
-            "W292", // no newline at end of file
-            "W293", // blank line contains whitespace
-            "W605", // invalid escape sequence "x"
-        ]
-        .join(",")
-    );
-    let files = check_output(
-        git()
-            .args(["ls-files", "--", "*.py"])
-            .args(get_pathspecs_default_excludes()),
-    )?;
-
-    let mut cmd = Command::new(bin_name);
-    cmd.args(["check", &checks]).args(files.lines());
-
-    match cmd.status() {
-        Ok(status) if status.success() => Ok(()),
-        Ok(_) => Err(format!("`{bin_name}` found errors!")),
-        Err(e) if e.kind() == ErrorKind::NotFound => {
-            println!("`{bin_name}` was not found in $PATH, skipping those checks.");
-            Ok(())
-        }
-        Err(e) => Err(format!("Error running `{bin_name}`: {e}")),
-    }
-}
-
 fn run_all_python_linters() -> LintResult {
     let mut good = true;
     let lint_dir = get_git_root().join("test/lint");