"aurora" wrote:
> The only issue is when s does not contain the character '=', let's say it is
> 'xyz', the result
> list has a len of 1 and the unpacking would fail. Is there some really handy
> trick to pack the
> result list into len of 2 so that it unpack as name='xyz' and value=''?
do you need a trick? spelling it out works just fine:
try:
key, value = field.split("=", 1)
except:
key = field; value = ""
or
if "=" in field:
key, value = field.split("=", 1)
else:
key = field; value = ""
(the former might be slightly more efficient if the "="-less case is uncommon)
or, if you insist:
key, value = re.match("([^=]*)(?:=(.*))?", field).groups()
or
key, value = (field + "="["=" in field:]).split("=", 1)
but that's not really worth the typing. better do
key, value = splitfield(field)
with a reasonable definition of splitfield (I recommend the try-except form).
> So more generally, is there an easy way to pad a list into length of n with
> filler items appended
> at the end?
some variants (with varying semantics):
list = (list + n*[item])[:n]
or
list += (n - len(list)) * [item]
or (readable):
if len(list) < n:
list.extend((n - len(list)) * [item])
etc.
</F>
--
http://mail.python.org/mailman/listinfo/python-list
