Seebs <usenet-nos...@seebs.net> writes:
> I have an existing hunk of Makefile code:
> CPPFLAGS = "$(filter -D* -I* -i* -U*,$(TARGET_CFLAGS))"
> For those not familiar with GNU makeisms, this means "assemble a string
> which consists of all the words in $(TARGET_CFLAGS) which start with one
> of -D, -I, -i, or -U". So if you give it
> foo -Ibar baz
> it'll say
> -Ibar
>
> I have a similar situation in a Python context, and I am wondering
> whether this is an idiomatic spelling:
>
> ' '.join([x for x in target_cflags.split() if re.match('^-[DIiU]', x)])
You can also use the (less favoured) filter:
>>> target_cflags="-ifoo -abar -U -Dbaz".split()
>>> def matches_flags(flags):
... return re.compile("^-[%s]" % flags).match
...
>>> ' '.join(filter(matches_flags("DiIU"), target_cflags))
'-ifoo -U -Dbaz'
--
Arnaud
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