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-rw-r--r--Doc/library/re.rst6
-rw-r--r--Lib/sre_constants.py11
2 files changed, 14 insertions, 3 deletions
diff --git a/Doc/library/re.rst b/Doc/library/re.rst
index 96338dc..0b9d975 100644
--- a/Doc/library/re.rst
+++ b/Doc/library/re.rst
@@ -839,15 +839,15 @@ form.
.. attribute:: pos
- The index of *pattern* where compilation failed.
+ The index in *pattern* where compilation failed (may be ``None``).
.. attribute:: lineno
- The line corresponding to *pos*.
+ The line corresponding to *pos* (may be ``None``).
.. attribute:: colno
- The column corresponding to *pos*.
+ The column corresponding to *pos* (may be ``None``).
.. versionchanged:: 3.5
Added additional attributes.
diff --git a/Lib/sre_constants.py b/Lib/sre_constants.py
index b016431..0261e9e 100644
--- a/Lib/sre_constants.py
+++ b/Lib/sre_constants.py
@@ -21,6 +21,17 @@ from _sre import MAXREPEAT, MAXGROUPS
# should this really be here?
class error(Exception):
+ """Exception raised for invalid regular expressions.
+
+ Attributes:
+
+ msg: The unformatted error message
+ pattern: The regular expression pattern
+ pos: The index in the pattern where compilation failed (may be None)
+ lineno: The line corresponding to pos (may be None)
+ colno: The column corresponding to pos (may be None)
+ """
+
def __init__(self, msg, pattern=None, pos=None):
self.msg = msg
self.pattern = pattern