diff options
Diffstat (limited to 'Lib/sre_parse.py')
| -rw-r--r-- | Lib/sre_parse.py | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/Lib/sre_parse.py b/Lib/sre_parse.py index 98afd7cb4a..af729c30db 100644 --- a/Lib/sre_parse.py +++ b/Lib/sre_parse.py @@ -21,6 +21,7 @@ DIGITS = frozenset("0123456789") OCTDIGITS = frozenset("01234567") HEXDIGITS = frozenset("0123456789abcdefABCDEF") +ASCIILETTERS = frozenset("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ") WHITESPACE = frozenset(" \t\n\r\v\f") @@ -344,6 +345,10 @@ def _class_escape(source, escape): elif c in DIGITS: raise ValueError if len(escape) == 2: + if c in ASCIILETTERS: + import warnings + warnings.warn('bad escape %s' % escape, + DeprecationWarning, stacklevel=8) return LITERAL, ord(escape[1]) except ValueError: pass @@ -407,6 +412,10 @@ def _escape(source, escape, state): return GROUPREF, group raise ValueError if len(escape) == 2: + if c in ASCIILETTERS: + import warnings + warnings.warn('bad escape %s' % escape, + DeprecationWarning, stacklevel=8) return LITERAL, ord(escape[1]) except ValueError: pass @@ -903,7 +912,10 @@ def parse_template(source, pattern): try: this = chr(ESCAPES[this][1]) except KeyError: - pass + if c in ASCIILETTERS: + import warnings + warnings.warn('bad escape %s' % this, + DeprecationWarning, stacklevel=5) lappend(this) else: lappend(this) |