MonkeeSage <[EMAIL PROTECTED]> wrote:
> In ruby there are several special literal notations, just like python.
> In ruby it goes like this:
>
> %{blah} / %Q{blah} # same as "blah" but igornes " and '
> %q{blah} # same as 'blah' but no interpolation
> %w{blah blah} # same as "blah blah".split
> %r{blah} # same as /blah/
> %x{ls} # same as `ls`
These are snatched straight from perl. In perl they are spelt
slightly differently
q{blah} r"""blah""" # not identical but similar
qq{blah} """blah""" # no interpolation in python so no direct concept
qw{blah blah} "blah blah".split()
qr{blah} re.compile(r"blah")
qx{ls} commands.getoutput("ls")
In perl (and maybe in ruby I don't know) the { } can be replaced with
any two identical chars, or the matching pair if bracketty, so q/blah/
or q(blah).
As a perl refugee, the only one I miss at all is qw{}, ie %w{} in ruby
the subject of this post.
In python when making __slots__ or module.__all__ you end up typing
lists of objects or methods and they turn out like this which is quite
a lot of extra typing
__slots__ = ["method1", "method2", "method3", "method4", "method5"]
You can of course write it like this
__slots__ = "method1 method2 method3 method4 method5".split()
which is nearly as neat as qw//, but not quite since the split() bit
comes at the end so it doesn't notify you that you have an array of
strings rather than a string.
I don't expect a replacement for %w{}, qw// to ever be added to
python, it is not the python way. And the python way is why I am now
a python programmer not a perl programmer!
--
Nick Craig-Wood <[EMAIL PROTECTED]> -- http://www.craig-wood.com/nick
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