On Nov 10, 10:02 am, Mel wrote:
> xoff wrote:
> > I was wondering what the best method was in Python programming for 2
> > discontinued ranges. e.g. I want to use the range 3 to 7 and 17 to 23.
> > Am I obliged to use 2 for loops defining the 2 ranges like this:
>
> > for i in range (3,7):
> > do
xoff writes:
> I am curious, why wouldn't you advise something like this:
> for i in chain(range(3,7) + range(17,23)):
First of all, the outer chain does nothing. Second, concatenating the
two lists creates a new list, consuming storage and taking time copying
all the elements. Third, if there
On 10/11/2010 17:34, xoff wrote:
On 10 nov, 18:15, Paul Rubin wrote:
you could use itertools.chain:
from itertools import chain
for i in chain(range(3,7), range(17,23)):
...
I'm assuming you're using python 3. In python 2 each of those ranges
expands immediately to a list, so on
On 11/10/2010 9:34 AM xoff said...
On 10 nov, 18:15, Paul Rubin wrote:
potentially lots of storage (you should use xrange instead). On the
other hand you could just concatenate the lists with +, but I wouldn't
advise that.
I am curious, why wouldn't you advise something like this:
for i in c
I was wondering what the best method was in Python programming for 2
discontinued ranges. e.g. I want to use the range 3 to 7 and 17 to 23.
Am I obliged to use 2 for loops defining the 2 ranges like this:
for i in range (3,7):
do bla
for i in range (7,17):
do bla
or is there a more clever way t
xoff writes:
> I was wondering what the best method was in Python programming for 2
> discontinued ranges. e.g. I want to use the range 3 to 7 and 17 to 23.
> Am I obliged to use 2 for loops defining the 2 ranges like this:
>
> for i in range (3,7):
> do bla
> for i in range (7,17):
> do bla
>
xoff wrote:
> I was wondering what the best method was in Python programming for 2
> discontinued ranges. e.g. I want to use the range 3 to 7 and 17 to 23.
> Am I obliged to use 2 for loops defining the 2 ranges like this:
>
> for i in range (3,7):
> do bla
> for i in range (7,17):
> do bla
>
On Wed, 10 Nov 2010 09:34:14 -0800, xoff wrote:
> I am curious, why wouldn't you advise something like this:
> for i in chain(range(3,7) + range(17,23)):
Because it constructs all three lists (both of the individual ranges and
their concatenation) in memory. For a trivial example, that isn't a
pr
On 10 nov, 18:15, Paul Rubin wrote:
> you could use itertools.chain:
>
> from itertools import chain
>
> for i in chain(range(3,7), range(17,23)):
> ...
>
> I'm assuming you're using python 3. In python 2 each of those ranges
> expands immediately to a list, so on the one hand they're con
On 10 nov, 18:13, Paul Rudin wrote:
> xoff writes:
> > I was wondering what the best method was in Python programming for 2
> > discontinued ranges. e.g. I want to use the range 3 to 7 and 17 to 23.
> > Am I obliged to use 2 for loops defining the 2 ranges like this:
>
> > for i in range (3,7):
>
xoff wrote:
> I was wondering what the best method was in Python programming for 2
> discontinued ranges. e.g. I want to use the range 3 to 7 and 17 to 23.
> Am I obliged to use 2 for loops defining the 2 ranges like this:
>
> for i in range (3,7):
> do bla
> for i in range (7,17):
> do bla
>
xoff writes:
> I was wondering what the best method was in Python programming for 2
> discontinued ranges. e.g. I want to use the range 3 to 7 and 17 to 23.
you could use itertools.chain:
from itertools import chain
for i in chain(range(3,7), range(17,23)):
...
I'm assuming you're usi
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