Silence third-party deprecation warnings and fix socket leak (#3983)

* Silence third-party deprecation warnings and fix socket resource leak

- Add warning filters for TorchAO deprecated import paths
- Filter SWIG builtin type warnings from bitsandbytes/triton
- Filter Triton autotuner deprecation warnings
- Filter Python 3.12+ multiprocessing fork warnings
- Filter resource warnings for unclosed sockets/files
- Fix socket leak in has_internet() by properly closing socket

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

unsloth/import_fixes.py

@@ -123,6 +123,47 @@ if os.environ.get("UNSLOTH_ENABLE_LOGGING", "0") != "1":
     warnings.filterwarnings("ignore", message = "`int4_weight_only` is deprecated")
     warnings.filterwarnings("ignore", message = "`int8_weight_only` is deprecated")
 
+    # TorchAO deprecated import paths (https://github.com/pytorch/ao/issues/2752)
+    warnings.filterwarnings(
+        "ignore",
+        message = r"Importing.*from torchao\.dtypes.*is deprecated",
+        category = DeprecationWarning,
+    )
+    warnings.filterwarnings(
+        "ignore",
+        message = r"Importing BlockSparseLayout from torchao\.dtypes is deprecated",
+        category = DeprecationWarning,
+    )
+
+    # SWIG builtin type warnings (from bitsandbytes/triton SWIG bindings)
+    warnings.filterwarnings(
+        "ignore",
+        message = r"builtin type Swig.*has no __module__ attribute",
+        category = DeprecationWarning,
+    )
+
+    # Triton autotuner deprecation (https://github.com/triton-lang/triton/pull/4496)
+    warnings.filterwarnings(
+        "ignore",
+        message = r"warmup, rep, and use_cuda_graph parameters are deprecated",
+        category = DeprecationWarning,
+    )
+
+    # Python 3.12+ multiprocessing fork warning in multi-threaded processes
+    warnings.filterwarnings(
+        "ignore",
+        message = r".*multi-threaded.*use of fork\(\) may lead to deadlocks",
+        category = DeprecationWarning,
+    )
+
+    # Resource warnings from internal socket/file operations
+    warnings.filterwarnings(
+        "ignore", message = r"unclosed.*socket", category = ResourceWarning
+    )
+    warnings.filterwarnings(
+        "ignore", message = r"unclosed file.*dev/null", category = ResourceWarning
+    )
+
 
 # Fix up AttributeError: 'MessageFactory' object has no attribute 'GetPrototype'
 # MUST do this at the start primarily due to tensorflow causing issues

unsloth/models/_utils.py

@@ -1152,8 +1152,12 @@ def has_internet(host = "8.8.8.8", port = 53, timeout = 3):
         return False
     try:
         socket.setdefaulttimeout(timeout)
-        socket.socket(socket.AF_INET, socket.SOCK_STREAM).connect((host, port))
-        return True
+        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        try:
+            sock.connect((host, port))
+            return True
+        finally:
+            sock.close()
     except socket.error as ex:
         return False