refactor the codegenerator

comtypes/tools/codegenerator.py

@@ -573,14 +573,7 @@ def generate_wrapper_code(
         print(self.declarations.getvalue(), file=output)
         print(file=output)
         print(self.stream.getvalue(), file=output)
-        names = ", ".join(repr(str(n)) for n in self.names)
-        dunder_all = "__all__ = [%s]" % names
-        if len(dunder_all) > 80:
-            wrapper = textwrap.TextWrapper(
-                subsequent_indent="    ", initial_indent="    ", break_long_words=False
-            )
-            dunder_all = "__all__ = [\n%s\n]" % "\n".join(wrapper.wrap(names))
-        print(dunder_all, file=output)
+        print(self._make_dunder_all_part(), file=output)
         print(file=output)
         if tlib_mtime is not None:
             print("_check_version(%r, %f)" % (version, tlib_mtime), file=output)
@@ -604,37 +597,57 @@ def generate_friendly_code(self, modname: str) -> str:
         wrapper_module_name = modname.split(".")[-1]
         print("from enum import IntFlag", file=output)
         print(file=output)
-        importing_symbols = set(self.names)
-        importing_symbols -= set(self.enums.get_symbols())
-        enum_aliases = {k: v for k, v in self.aliases.items() if v in self.enums}
-        importing_symbols -= set(enum_aliases)
-        importing_symbols.update(self.imports.get_symbols())
-        importing_symbols.update(self.declarations.get_symbols())
-        joined_names = ", ".join(str(n) for n in importing_symbols)
-        symbols = f"from {modname} import {joined_names}"
-        if len(symbols) > 80:
-            wrapped_names = "\n".join(txtwrapper.wrap(joined_names))
-            symbols = f"from {modname} import (\n{wrapped_names}\n)"
         print(f"from comtypes.gen import {wrapper_module_name}", file=output)
-        print(symbols, file=output)
+        print(self._make_friendly_module_import_part(modname), file=output)
         print(file=output)
         print(file=output)
         print(self.enums.getvalue(wrapper_module_name), file=output)
+        print(file=output)
+        print(file=output)
+        enum_aliases = self.enum_aliases
         if enum_aliases:
             for k, v in enum_aliases.items():
                 print(f"{k} = {v}", file=output)
-        else:
-            print("# no alias for enumerations", file=output)
-        print(file=output)
-        print(file=output)
-        quoted_names = ", ".join(repr(str(n)) for n in self.names)
-        dunder_all = f"__all__ = [{quoted_names}]"
-        if len(dunder_all) > 80:
-            wrapped_quoted_names = "\n".join(txtwrapper.wrap(quoted_names))
-            dunder_all = f"__all__ = [\n{wrapped_quoted_names}\n]"
-        print(dunder_all, file=output)
+            print(file=output)
+            print(file=output)
+        print(self._make_dunder_all_part(), file=output)
         return output.getvalue()
 
+    def _make_dunder_all_part(self) -> str:
+        joined_names = ", ".join(repr(str(n)) for n in self.names)
+        dunder_all = f"__all__ = [{joined_names}]"
+        if len(dunder_all) > 80:
+            txtwrapper = textwrap.TextWrapper(
+                subsequent_indent="    ", initial_indent="    ", break_long_words=False
+            )
+            joined_names = "\n".join(txtwrapper.wrap(joined_names))
+            dunder_all = f"__all__ = [\n{joined_names}\n]"
+        return dunder_all
+
+    def _make_friendly_module_import_part(self, modname: str) -> str:
+        # The `modname` is the wrapper module name like `comtypes.gen._xxxx..._x_x_x`
+        txtwrapper = textwrap.TextWrapper(
+            subsequent_indent="    ", initial_indent="    ", break_long_words=False
+        )
+        symbols = set(self.names)
+        symbols.update(self.imports.get_symbols())
+        symbols.update(self.declarations.get_symbols())
+        symbols -= set(self.enums.get_symbols())
+        symbols -= set(self.enum_aliases)
+        joined_names = ", ".join(str(n) for n in symbols)
+        part = f"from {modname} import {joined_names}"
+        if len(part) > 80:
+            txtwrapper = textwrap.TextWrapper(
+                subsequent_indent="    ", initial_indent="    ", break_long_words=False
+            )
+            joined_names = "\n".join(txtwrapper.wrap(joined_names))
+            part = f"from {modname} import (\n{joined_names}\n)"
+        return part
+
+    @property
+    def enum_aliases(self) -> Dict[str, str]:
+        return {k: v for k, v in self.aliases.items() if v in self.enums}
+
     def need_VARIANT_imports(self, value):
         text = repr(value)
         if "Decimal(" in text:
@@ -1575,4 +1588,4 @@ def getvalue(self, wrapper_module_name: str) -> str:
                 ref = f"{wrapper_module_name}.{member_name}"
                 lines.append(f"    {member_name} = {ref}")
             blocks.append("\n".join(lines))
-        return "\n\n".join(blocks)
+        return "\n\n\n".join(blocks)