add formatter macros for \begin{macrocode}

PyTeX/format/default_macros.py

@@ -29,7 +29,9 @@ def get_default_macros(tex_flavour: TeXFlavour):
         make_simple_macro('repodirty', FormatterProperty.repo_dirty),
         make_simple_macro('sourcename', FormatterProperty.source_file_name),
         ConfigEndMacro(),
-        ConfigBeginMacro()
+        ConfigBeginMacro(),
+        MacroCodeBeginMacro(),
+        MacroCodeBeginMacro(),
     ]
     tex2 = [
         ArgumentMacro(

PyTeX/format/macros.py

@@ -138,6 +138,28 @@ class ConfigEndMacro(SingleLineMacro):
         return []
 
 
+class MacroCodeBeginMacro(SingleLineMacro):
+    def __init__(self):
+        super(MacroCodeBeginMacro, self).__init__(r'\begin{macrocode}')
+
+    def apply(self, line: str, formatter) -> Union[str, List[str]]:
+        if not formatter.mode == FormatterMode.meta:
+            raise NotImplementedError
+        formatter.mode = FormatterMode.macrocode
+        return r'%    \begin{macrocode}'
+
+
+class MacroCodeEndMacro(SingleLineMacro):
+    def __init__(self):
+        super(MacroCodeEndMacro, self).__init__(r'\end{macrocode}')
+
+    def apply(self, line: str, formatter) -> Union[str, List[str]]:
+        if not formatter.mode == FormatterMode.macrocode:
+            raise NotImplementedError
+        formatter.mode = FormatterMode.meta
+        return r'%    \end{macrocode}'
+
+
 class ArgumentMacro(Macro):
     def __init__(
             self,