STYLE: Encapsulate initialization for keeping namespace clean.

Author: hjmjohnson

Wrapping/Generators/Python/itkConfig.py.in

@@ -34,8 +34,6 @@ Currently-supported options are:
   LazyLoading: Only load an itk library when needed. Before the library is
     loaded, the namespace will be inhabited with dummy objects."""
 
-import warnings
-import os
 
 # User options
 SILENT: int = 0
@@ -59,36 +57,45 @@ def _itk_format_warning(msg, *_, **__):
     return str(msg) + "\n"
 
 
+import warnings
+
 # Redefine the format of the warnings
 warnings.formatwarning = _itk_format_warning
 
 
-def _normalized_path(relative_posix_path):
-    if relative_posix_path != "None":
-        file_dir = os.path.split(__file__)[0]
-        relative_path = relative_posix_path.replace("/", os.sep)
-        return os.path.normpath(os.path.join(file_dir, relative_path))
+def _initialize():
+    import os
+
+    def _normalized_path(relative_posix_path):
+        if relative_posix_path != "None":
+            file_dir = os.path.split(__file__)[0]
+            relative_path = relative_posix_path.replace("/", os.sep)
+            return os.path.normpath(os.path.join(file_dir, relative_path))
+
+    # swig_lib: location of the swig-generated shared libraries
+    _swig_lib = _normalized_path("@CONFIG_PYTHON_SWIGLIB_DIR@")
 
+    # swig_py: location of the xxxPython.py swig-generated python interfaces
+    _swig_py = _normalized_path("@CONFIG_PYTHON_SWIGPY_DIR@")
 
-# swig_lib: location of the swig-generated shared libraries
-swig_lib = _normalized_path("@CONFIG_PYTHON_SWIGLIB_DIR@")
+    # config_py: location of xxxConfig.py CMake-generated library descriptions
+    _config_py = _normalized_path("@CONFIG_PYTHON_CONFIGPY_DIR@")
 
-# swig_py: location of the xxxPython.py swig-generated python interfaces
-swig_py = _normalized_path("@CONFIG_PYTHON_SWIGPY_DIR@")
+    # put the itkConfig.py path in the path list
+    _path = [os.path.join(_config_py, "..")]
+    # also populate path with the WRAPITK_PYTHON_PATH var
+    if "WRAPITK_PYTHON_PATH" in os.environ:
+        _path.extend(os.environ["WRAPITK_PYTHON_PATH"].split(":"))
 
-# config_py: location of xxxConfig.py CMake-generated library descriptions
-config_py = _normalized_path("@CONFIG_PYTHON_CONFIGPY_DIR@")
+    _doxygen_root = _normalized_path("../Doc")
 
-# put the itkConfig.py path in the path list
-path = [os.path.join(config_py, "..")]
-# also populate path with the WRAPITK_PYTHON_PATH var
-if "WRAPITK_PYTHON_PATH" in os.environ:
-    path.extend(os.environ["WRAPITK_PYTHON_PATH"].split(":"))
+    return _swig_lib, _swig_py, _config_py, _doxygen_root, _path
 
-doxygen_root = _normalized_path("../Doc")
 
 ITK_GLOBAL_VERSION_STRING: str = "@ITK_VERSION_MAJOR@.@ITK_VERSION_MINOR@.@ITK_VERSION_PATCH@"
 
+(swig_lib, swig_py, config_py, doxygen_root, path) = _initialize()
+del _initialize
 del _normalized_path
 del os
 del warnings