move CLI logic into __main__

Author: jorenham

threadpoolctl/__init__.py

@@ -1253,45 +1253,3 @@ def _get_windll(cls, dll_name):
             dll = ctypes.WinDLL(f"{dll_name}.dll")
             cls._system_libraries[dll_name] = dll
         return dll
-
-
-def _main():
-    """Commandline interface to display thread-pool information and exit."""
-    import argparse
-    import importlib
-    import json
-    import sys
-
-    parser = argparse.ArgumentParser(
-        usage="python -m threadpoolctl -i numpy scipy.linalg xgboost",
-        description="Display thread-pool information and exit.",
-    )
-    parser.add_argument(
-        "-i",
-        "--import",
-        dest="modules",
-        nargs="*",
-        default=(),
-        help="Python modules to import before introspecting thread-pools.",
-    )
-    parser.add_argument(
-        "-c",
-        "--command",
-        help="a Python statement to execute before introspecting thread-pools.",
-    )
-
-    options = parser.parse_args(sys.argv[1:])
-    for module in options.modules:
-        try:
-            importlib.import_module(module, package=None)
-        except ImportError:
-            print("WARNING: could not import", module, file=sys.stderr)
-
-    if options.command:
-        exec(options.command)
-
-    print(json.dumps(threadpool_info(), indent=2))
-
-
-if __name__ == "__main__":
-    _main()

threadpoolctl/__main__.py

@@ -0,0 +1,46 @@
+"""Commandline interface to display thread-pool information and exit."""
+
+__all__ = ()
+
+
+def _main() -> None:
+    import argparse
+    import importlib
+    import json
+    import sys
+
+    from threadpoolctl import threadpool_info
+
+    parser = argparse.ArgumentParser(
+        usage="python -m threadpoolctl -i numpy scipy.linalg xgboost",
+        description="Display thread-pool information and exit.",
+    )
+    parser.add_argument(
+        "-i",
+        "--import",
+        dest="modules",
+        nargs="*",
+        default=(),
+        help="Python modules to import before introspecting thread-pools.",
+    )
+    parser.add_argument(
+        "-c",
+        "--command",
+        help="a Python statement to execute before introspecting thread-pools.",
+    )
+    options = parser.parse_args(sys.argv[1:])
+
+    for module in options.modules:
+        try:
+            importlib.import_module(module, package=None)
+        except ImportError:
+            print("WARNING: could not import", module, file=sys.stderr)
+
+    if options.command:
+        exec(options.command)
+
+    print(json.dumps(threadpool_info(), indent=2))
+
+
+if __name__ == "__main__":
+    _main()