| In development mode and in debug build, *encoding* and *errors* arguments are | |
| now checked on string encoding and decoding operations. Examples: :func:`open`, | |
| :meth:`str.encode` and :meth:`bytes.decode`. | |
| By default, for best performances, the *errors* argument is only checked at the | |
| first encoding/decoding error, and the *encoding* argument is sometimes ignored | |
| for empty strings. |