mscz.py: Add comments

src/modules/mscz.py

@@ -9,6 +9,14 @@ import json
 Patches
 """
 class Patches:
+    """
+    Is meant to index and simplify the way to access a patch.
+    Instead of doing apply(.., .., mscz.create_pagebreaks(ext="mscx")) which is redundant and needs to specify mscx,
+    you can just do apply(.., .., mscz.patches.create_pagebreaks)
+
+    To register a new patch outside of this file, just use @mscz.register_patch(ext=.., filename=..) (one of the two)
+    You can then access it the same way
+    """
     def __init__(self):
         self._data = {}
     def __getattr__(self, key):
@@ -18,6 +26,9 @@ class Patches:
 patches = Patches()
 
 def register_patch(ext=None, filename=None):
+    """
+    Register a new patch. One of the two arguments is mandatory
+    """
     if ext is None and filename is None:
         raise ValueError("You must specify at least one of the two parameters")