Hi Huji,

It does look like the difference in Python versions is the problem. The Python 3 docs say:

Both string and bytes literals may optionally be prefixed with a letter 'r' or 'R'; such strings are called raw strings and treat backslashes as literal characters. As a result, in string literals, '\U' and '\u' escapes in raw strings are not treated specially. Given that Python 2.x’s raw unicode literals behave differently than Python 3.x’s the 'ur' syntax is not supported.

So the syntax you tried to use is indeed invalid. I don't really know what the exact difference is between Python 2 and Python 3 raw Unicode literals, but since in Python 3 literal strings are always taken as Unicode, you can probably just use r'...' for your regular expression and settle on Python 3 for both local development and on Toolforge.

Hope this helps!

2018-08-19 21:57 GMT+01:00 Huji Lee <huji.huji@gmail.com>:

Excellent question. On my own computer, I am using 2.7.12 but on labs it is 3.4.3

Of note, when I changed my code such that all cases of ur'...' now read u'...' the script worked in both environments. So it has to do with how escaping works in python, I guess. But I am not sure.

On Sun, Aug 19, 2018 at 4:48 PM Alex Monk <krenair@gmail.com> wrote:

What are the versions of Python involved?

On Sun, 19 Aug 2018 at 21:34, Huji Lee <huji.huji@gmail.com> wrote:

Hello,

When I run this script[1] on my own machine it runs without any problem. When I run it on Labs, I get an invalid syntax error, pasted below. Can you please help me figure out why?

Thanks!

(venv)tools.huji@tools-bastion-03:~$ python core/pwb.py webcite -page:"SOME PAGE"
Traceback (most recent call last):
  File "core/pwb.py", line 253, in <module>
    if not main():
  File "core/pwb.py", line 246, in main
    run_python_file(filename, [filename] + args, argvu, file_package)
  File "core/pwb.py", line 114, in run_python_file
    exec(compile(source, filename, "exec", dont_inherit=True),
  File "core/scripts/userscripts/webcite.py", line 125
    faCitationPattern = ur'\{\{\s*یادکرد(?:\{\{.*?\}\}|.)*?\}\}'

  [1] https://github.com/PersianWikipedia/fawikibot/blob/master/webcite.py

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--

Guilherme P. Gonçalves

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