New submission from Chi Hsuan Yen:
In issue27364, invalid escape sequences in string literals are deprecated.
Currently the deprecation message is not so useful when fixing lots of files in
one or more large projects. For example, I have two files foo.py and bar.py:
# foo.py
import bar
# bar.py
print('\d')
It gives:
$ python3.6 -W error foo.py
Traceback (most recent call last):
File "foo.py", line 1, in <module>
import bar
DeprecationWarning: invalid escape sequence '\d'
My idea is that the warning message can be improved to provide more
information. In http://bugs.python.org/issue27364#msg269373 it's proposed to
let a linter check such misuses. It's useful within a single project. For a
project that depends on lots of external projects, a linter is not enough.
Things are worse when __import__, imp or importlib are involved, or sys.path is
modified. I have to either add some codes or use a debugger to show which
module is imported.
For above reasons, I propose to add at least the filename and the line number
to the warning message. For example:
$ ./python -W error foo.py
Traceback (most recent call last):
File "foo.py", line 1, in <module>
import bar
File "/home/yen/Projects/cpython/build/bar.py", line 1
print('\d')
^
SyntaxError: (deprecated usage) invalid escape sequence '\d'
With that I can know which file or project I should blame.
Added some of reviewers from issue27364 to nosy list.
----------
components: Interpreter Core, Library (Lib)
messages: 276285
nosy: Chi Hsuan Yen, martin.panter, r.david.murray, serhiy.storchaka
priority: normal
severity: normal
status: open
title: Improve the warning message for invalid escape sequences
type: enhancement
versions: Python 3.6, Python 3.7
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Python tracker <[email protected]>
<http://bugs.python.org/issue28128>
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