diff --git a/bindings/python/tokenizers/__init__.pyi b/bindings/python/tokenizers/__init__.pyi
index ef5612da..95332e51 100644
--- a/bindings/python/tokenizers/__init__.pyi
+++ b/bindings/python/tokenizers/__init__.pyi
@@ -21,7 +21,15 @@ class IndexableString:
     Works almost like a `str`, but allows indexing on offsets
     provided on an `Encoding`
     """
-    pass
+
+    def offsets(self, offsets: Tuple[int, int]) -> Optional[Tuple[int, int]]:
+        """ Convert the Encoding's offsets to the current string.
+
+        `Encoding` provides a list of offsets that are actually offsets to the Normalized
+        version of text. Calling this method with the offsets provided by `Encoding` will make
+        sure that said offsets can be used to index the `str` directly.
+        """
+        pass
 
 class Encoding:
     """ An Encoding as returned by the Tokenizer """
@@ -53,7 +61,11 @@ class Encoding:
 
     @property
     def offsets(self) -> List[Offsets]:
-        """ The offsets """
+        """ The offsets.
+        These offsets can be used to index any `IndexableString` directly. If you want to
+        index the original `str`, make sure to retrieve the converted offsets using the `.offsets`
+        method on the `original_str`.
+        """
         pass
 
     @property
diff --git a/bindings/python/tokenizers/decoders/__init__.pyi b/bindings/python/tokenizers/decoders/__init__.pyi
index 4b04c3e1..e101aa25 100644
--- a/bindings/python/tokenizers/decoders/__init__.pyi
+++ b/bindings/python/tokenizers/decoders/__init__.pyi
@@ -11,14 +11,14 @@ class Decoder:
         """ Decode the given list of string to a final string """
         pass
 
-class ByteLevel:
+class ByteLevel(Decoder):
     """ ByteLevel Decoder """
 
     def __init__(self) -> None:
         """ Instantiate a new ByteLevel Decoder """
         pass
 
-class WordPiece:
+class WordPiece(Decoder):
     """ WordPiece Decoder """
 
     @staticmethod
@@ -31,7 +31,7 @@ class WordPiece:
         """
         pass
 
-class Metaspace:
+class Metaspace(Decoder):
     """ Metaspace decoder """
 
     def __init__(self, replacement: str = "▁", add_prefix_space: bool = True) -> None:
@@ -48,7 +48,7 @@ class Metaspace:
         """
         pass
 
-class BPEDecoder:
+class BPEDecoder(Decoder):
     """ BPEDecoder """
 
     def __init__(self, suffix: str = "</w>") -> None:
diff --git a/bindings/python/tokenizers/processors/__init__.pyi b/bindings/python/tokenizers/processors/__init__.pyi
index 4c037eae..bf7f9f03 100644
--- a/bindings/python/tokenizers/processors/__init__.pyi
+++ b/bindings/python/tokenizers/processors/__init__.pyi
@@ -7,7 +7,7 @@ class PostProcessor:
     a PostProcessor will return an instance of this class when instantiated.
     """
 
-class BertProcessing:
+class BertProcessing(PostProcessor):
     """ BertProcessing
 
     This post-processor takes care of adding the special tokens needed by
@@ -31,7 +31,7 @@ class BertProcessing:
         """
         pass
 
-class RobertaProcessing:
+class RobertaProcessing(PostProcessor):
     """ RobertaProcessing
 
     This post-processor takes care of adding the special tokens needed by
diff --git a/bindings/python/tokenizers/trainers/__init__.pyi b/bindings/python/tokenizers/trainers/__init__.pyi
index dae564ef..688ca85d 100644
--- a/bindings/python/tokenizers/trainers/__init__.pyi
+++ b/bindings/python/tokenizers/trainers/__init__.pyi
@@ -7,7 +7,7 @@ class Trainer:
     Trainer will return an instance of this class when instantiated.
     """
 
-class BpeTrainer:
+class BpeTrainer(Trainer):
     """ BpeTrainer
 
     Capable of training a BPE model
@@ -59,7 +59,7 @@ class BpeTrainer:
         """
         pass
 
-class WordPieceTrainer:
+class WordPieceTrainer(Trainer):
     """ WordPieceTrainer
 
     Capable of training a WordPiece model