On 31 May 2014, at 11:13, Jonathan Hartley <tart...@tartley.com> wrote:
> That's what I thought too, but: > > $ python3 > Python 3.4.0 (default, Apr 19 2014, 12:20:10) > [GCC 4.8.1] on linux > Type "help", "copyright", "credits" or "license" for more information. > >>> class Some(object): > ... tokens = ['a', 'b', 'c'] > ... untokenized = [Some.tokens.index(a) for a in ['b']] > ... > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > File "<stdin>", line 3, in Some > File "<stdin>", line 3, in <listcomp> > NameError: name 'Some' is not defined > The name Some is not bound until the class body has finished executing. You should just be able to access the name "tokens" from inside the class body though: python3 Python 3.3.4 (v3.3.4:7ff62415e426, Feb 9 2014, 00:29:34) [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> class Some: ... tokens = [1, 2, 3] ... thing = [token ** 2 for token in tokens] ... >>> Michael > > On 30/05/14 16:07, Sven Marnach wrote: >> On 30 May 2014 15:49, Harry Percival <harry.perci...@gmail.com> wrote: >> I had the problem outside of a class body, in a normal function... >> >> The particular problem mentioned in the StackOverflow quesiton you linked >> only ever occurs inside class bodies. They are the only enclosing scopes >> that are skipped in name lookups. You can still access class attributes of >> the class by using ClassName.attribute inside the list comprehension, like >> you would have to do to access class attributes from inside methods. >> >> Cheers, >> Sven >> >> >> >> _______________________________________________ >> python-uk mailing list >> >> python-uk@python.org >> https://mail.python.org/mailman/listinfo/python-uk > > -- > Jonathan Hartley > tart...@tartley.com http://tartley.com > > Made of meat. +44 7737 062 225 twitter/skype: tartley > > > _______________________________________________ > python-uk mailing list > python-uk@python.org > https://mail.python.org/mailman/listinfo/python-uk -- http://www.voidspace.org.uk/ May you do good and not evil May you find forgiveness for yourself and forgive others May you share freely, never taking more than you give. -- the sqlite blessing http://www.sqlite.org/different.html _______________________________________________ python-uk mailing list python-uk@python.org https://mail.python.org/mailman/listinfo/python-uk
