From 1b43e2d776b2f8d7400259ab229247fc4f747f22 Mon Sep 17 00:00:00 2001
From: Anton Petnitsky <168552591+Mukller@users.noreply.github.com>
Date: Wed, 29 Jul 2026 17:47:52 +0300
Subject: [PATCH] fix(path): handle bytes/memoryview keys in stringify_element
 (#472)
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stringify_element() checks `"'" in param` to detect single-quoted strings
before choosing a quote style. When param is bytes (e.g. a dict key b"foo"),
the str needle `"'"` raises TypeError: a bytes-like object is required.

bytes and memoryview have a canonical repr() that round-trips safely
(b"foo" → repr → "b'foo'") and needs no additional quoting, so we
return repr(param) immediately for those types before the str-search.

Reproducer:
    from deepdiff import DeepDiff
    DeepDiff({b"foo": 1}, {b"foobar": 1})  # TypeError before, works after
---
 deepdiff/path.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/deepdiff/path.py b/deepdiff/path.py
index 3854b6bf..d9443192 100644
--- a/deepdiff/path.py
+++ b/deepdiff/path.py
@@ -311,6 +311,8 @@ def parse_path(path, root_element=DEFAULT_FIRST_ELEMENT, include_actions=False):
 
 
 def stringify_element(param, quote_str=None):
+    if isinstance(param, (bytes, memoryview)):
+        return repr(param)
     has_quote = "'" in param
     has_double_quote = '"' in param
     if has_quote and has_double_quote and not quote_str: