refactor(cli): move sections list parsing to function

src/jcloud_docsgen/cli/languages/python.py

@@ -18,11 +18,47 @@ from typing import Optional
 
 __all__ = [
     'VALID_SECTIONS',
+    'parse_sections_list',
     'generate'
 ]
 
 VALID_SECTIONS = list(PythonDefinitionDocumentationIncludeSections()._args.keys())
 
+def parse_sections_list(include_sections: Optional[list[str]] = None, exclude_sections: list[str] = []) -> PythonDefinitionDocumentationIncludeSections:
+    '''
+    Returns a Python definition documentation sections list from the
+    sections list to be included and the sections list to be excluded.
+    These lists both consist of the sections as strings which contain
+    the section name.
+
+    :param include_sections: The list of sections to be included.
+    :type include_sections: Optional[list[str]]
+    :param exclude_sections: The list of sections to be excluded.
+    :type exclude_sections: list[str]
+
+    :return: The Python definition documentation sections object.
+    :rtype: PythonDefinitionDocumentationIncludeSections
+    '''
+
+    if include_sections is None:
+        include_sections = VALID_SECTIONS
+
+    for section in exclude_sections:
+        while section in include_sections:
+            del include_sections[include_sections.index(section)]
+
+    return PythonDefinitionDocumentationIncludeSections(
+        signature  = 'signature'  in include_sections,
+        returns    = 'returns'    in include_sections,
+        params     = 'params'     in include_sections,
+        exceptions = 'exceptions' in include_sections,
+        examples   = 'examples'   in include_sections,
+        docstring  = 'docstring'  in include_sections,
+        bases      = 'bases'      in include_sections,
+        decorators = 'decorators' in include_sections,
+        class_body = 'class_body' in include_sections
+    )
+
 def _generate(
     project_directory: pathlib.Path,
     output_directory: pathlib.Path,
@@ -86,24 +122,7 @@ def generate(
                          Warning: Markdown tables are not CommonMark.
     '''
 
-    if include_sections is None:
+    sections = parse_sections_list(include_sections, exclude_sections)
-        include_sections = VALID_SECTIONS
-
-    for section in exclude_sections:
-        while section in include_sections:
-            del include_sections[include_sections.index(section)]
-
-    sections = PythonDefinitionDocumentationIncludeSections(
-        signature  = 'signature'  in include_sections,
-        returns    = 'returns'    in include_sections,
-        params     = 'params'     in include_sections,
-        exceptions = 'exceptions' in include_sections,
-        examples   = 'examples'   in include_sections,
-        docstring  = 'docstring'  in include_sections,
-        bases      = 'bases'      in include_sections,
-        decorators = 'decorators' in include_sections,
-        class_body = 'class_body' in include_sections
-    ) if include_sections else PythonDefinitionDocumentationIncludeSections()
 
     _generate(
         project_directory,