Is there a method to create a dict from a list of keys and a list of
values ?
TIA
Tertius 6 2420
Tertius wrote: Is there a method to create a dict from a list of keys and a list of values ? dict(zip(range( 3), "abc"))
{0: 'a', 1: 'b', 2: 'c'}
Not a method() but a method.
Peter
Peter Otten wrote: Tertius wrote:
Is there a method to create a dict from a list of keys and a list of values ?
dict(zip(ra nge(3), "abc"))
{0: 'a', 1: 'b', 2: 'c'}
Not a method() but a method.
Peter
much better than a for loop :)
thnx
|a = {}
|for k , v in zip(keys,values ):
| a[k] = v keys = (1,2,3,4) vals = 'a b c d'.split() dct = dict(zip(keys,v als)) dct
{1: 'a', 2: 'b', 3: 'c', 4: 'd'}
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[Tertius wrote] Is there a method to create a dict from a list of keys and a list of values ?
[Peter Otten] dict(zip(range( 3), "abc")) {0: 'a', 1: 'b', 2: 'c'}
If you're using Py2.3, then the itertools way is a bit nicer: dict(itertools. izip(range(3), "abc"))
{0: 'a', 1: 'b', 2: 'c'}
Raymond Hettinger
Tertius <tc****@ananzi. co.za> writes: Tertius wrote: Is there a method to create a dict from a list of keys and a list of values ? TIA Tertius
I found a way...
a = {} for k , v in zip(keys,values ): a[k] = v
Or:
python
Python 2.3 (#1, Jul 30 2003, 21:59:29)
[GCC 3.3 (SuSE Linux)] on linux2
Type "help", "copyright" , "credits" or "license" for more information. a=(1,2,3) b=(4,5,6) dict(zip(a,b))
{1: 4, 2: 5, 3: 6}
Greetings
Berthold
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On Fri, 2003-08-29 at 04:53, Peter Otten wrote: dict(izip(irang e(3), "abc")) {0: 'a', 1: 'b', 2: 'c'}
If I could use the above in Py2.4, it would be even nicer, namely:
- convert itertools to builtins
The push is to have LESS builtins. You can always import them in to the
current namespace:
from itertools import izip
- add irange(), perhaps as an alias for xrange() like file/open
I suggested an irange to Raymond, and even coded one up, a while ago.
He sees it as bloat, and rightfully so, since there is a push to allow
optimizations of range that would achieve the same effect. (ie. rather
than remembering when to use range(), xrange(), or irange(), we could
just always use range() and the language would do lazy evaluation
whenever possible.) Unless that avenue turns out to be a complete dead
end, don't expect an irange().
BTW. In the example you used, you COULD use xrange(). The only problem
is that range has been extended, in 2.3, to accept longs, and xrange()
only works with ints, and Guido wants it that way (he doesn't want to
extend xrange()'s features, since it is a pain.) irange(), if it ever
appears, would presumably be fully range() compatible.
--
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TIA
(need this for what I hope is an improvement on the Larosa/Foord OrderedDict ;-)
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