traverseda
/
cpython
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Add information about DeprecationWarning for invalid escaped characters in the re module (GH-5255)

This commit is contained in:
Pablo Galindo 2019-01-20 18:57:56 +00:00 committed by GitHub
parent b2dc4a3313
commit e8239b8e81
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
Doc/library/re.rst
View File

@ -28,7 +28,10 @@ character for the same purpose in string literals; for example, to match
a literal backslash, one might have to write ``'\\\\'`` as the pattern
string, because the regular expression must be ``\\``, and each
backslash must be expressed as ``\\`` inside a regular Python string
literal.
literal. Also, please note that any invalid escape sequences in Python's
usage of the backslash in string literals now generate a :exc:`DeprecationWarning`
and in the future this will become a :exc:`SyntaxError`. This behaviour
will happen even if it is a valid escape sequence for a regular expression.
The solution is to use Python's raw string notation for regular expression
patterns; backslashes are not handled in any special way in a string literal