.. _anomalous-unicode-escape-in-string:

anomalous-unicode-escape-in-string / W1402
==========================================

**Message emitted:**

Anomalous Unicode escape in byte string: '%s'. String constant might be missing an r or u prefix.

**Description:**

*Used when an escape like \u is encountered in a byte string where it has no effect.*


**Correct code:**

.. code-block:: python

  print(b"\\u{0}".format("0394"))


**Problematic code:**

.. code-block:: python

  print(b"\u{0}".format("0394"))  # [anomalous-unicode-escape-in-string]




Created by ``string`` checker