unicode within a RE grouping

[bluefrog]

Hi

I'm getting an error for the following:

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import re pattern = re.compile(r"(?u)\w+") list = pattern.findall(ur"ñ") print(list)

Error:
    list = pattern.findall(ur"ñ")
                               ^
SyntaxError: invalid syntax

Can anybody suggest what the problem might be ?

[scidam]

If you look at Python lexical analysis rules, you can see that stringprefix doesn't contain ur as a prefix for strings. So, ur"some_string" is illegal construction in Python.

[snippsat]

It's illegal in python 3 as pointed out bye @scidam.
In python 2 ur prefix was used when needed to combine raw string and Unicode in a regex pattern.

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# Python 2.7 >>> import re >>> >>> pattern = re.compile(ur"(ñ)") >>> uni_char = pattern.search(u'helloñ world') >>> uni_char.group(1) u'\xf1' >>> print(uni_char.group(1)) ñ

One of the biggest changes moving to Python 3 was Unicode.
In Python 3 are all strings sequences of Unicode character.
So there is no longer need for u prefix,we will not see u'\xf1'.
r raw string should still always be used in regex patten,because of escape character.

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# Python 3.6 >>> s = 'ñ' >>> s 'ñ'

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# Python 3.6 >>> import re >>> >>> pattern = re.compile(r"(ñ)") >>> uni_char = pattern.search('helloñ world') >>> uni_char.group(1) 'ñ'