diff options
Diffstat (limited to 'Doc/reference/lexical_analysis.rst')
| -rw-r--r-- | Doc/reference/lexical_analysis.rst | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/Doc/reference/lexical_analysis.rst b/Doc/reference/lexical_analysis.rst index 566e90b..2a9fd79 100644 --- a/Doc/reference/lexical_analysis.rst +++ b/Doc/reference/lexical_analysis.rst @@ -423,8 +423,9 @@ characters that otherwise have a special meaning, such as newline, backslash itself, or the quote character. String literals may optionally be prefixed with a letter ``'r'`` or ``'R'``; -such strings are called :dfn:`raw strings` and use different rules for -interpreting backslash escape sequences. +such strings are called :dfn:`raw strings` and treat backslashes as literal +characters. As a result, ``'\U'`` and ``'\u'`` escapes in raw strings are not +treated specially. Bytes literals are always prefixed with ``'b'`` or ``'B'``; they produce an instance of the :class:`bytes` type instead of the :class:`str` type. They @@ -520,15 +521,6 @@ is more easily recognized as broken.) It is also important to note that the escape sequences only recognized in string literals fall into the category of unrecognized escapes for bytes literals. -When an ``'r'`` or ``'R'`` prefix is used in a string literal, then the -``\uXXXX`` and ``\UXXXXXXXX`` escape sequences are processed while *all other -backslashes are left in the string*. For example, the string literal -``r"\u0062\n"`` consists of three Unicode characters: 'LATIN SMALL LETTER B', -'REVERSE SOLIDUS', and 'LATIN SMALL LETTER N'. Backslashes can be escaped with a -preceding backslash; however, both remain in the string. As a result, -``\uXXXX`` escape sequences are only recognized when there is an odd number of -backslashes. - Even in a raw string, string quotes can be escaped with a backslash, but the backslash remains in the string; for example, ``r"\""`` is a valid string literal consisting of two characters: a backslash and a double quote; ``r"\"`` |