Use buffer protocol to retrieve result from python post_process (#605)

Saves an extra copy, gives post processing functions more flexibility

1 files changed, 3 insertions, 0 deletions

diff --git a/docs/custom_mutators.md b/docs/custom_mutators.md
index 2516e511..53f783fe 100644
--- a/docs/custom_mutators.md
+++ b/docs/custom_mutators.md
@@ -130,6 +130,9 @@ def introspection():
     `post_process` function. This function is then transforming the data into the
     format expected by the API before executing the target.
 
+    This can return any python object that implements the buffer protocol and
+    supports PyBUF_SIMPLE. These include bytes, bytearray, etc.
+
 - `queue_new_entry` (optional):
 
     This methods is called after adding a new test case to the queue.