> On 7/6/06, Girish Sahani <[EMAIL PROTECTED]> wrote:
> Thus, for the above list, my output should be:
> [['a.1','b.3','c.2'],['a.1','b.4','c.2']]
> Another example: Let l = ['a.1','b.3','b.4','c.2','c.6','d.3']. Then
> output should be [['a.1','b.3','c.2','d.3'],['a.1','b.3','c.6','d.3'],
> ['a.1','b.4','c.2','d.3'],[['a.1','b.4','c.6','d.3']
>
> Can anyone suggest me a time-efficient method for doing this??
-----------------------------------------------------------------------------
x = ['a.1','b.3','b.4','c.2','c.6','d.3']
d = {}
for y in x:
l = d.get(y.split('.')[0], [])
l.append(y)
d[y.split('.')[0]] = l
output = [[]]
for l in d.values():
dfdf = output[:]
## ugly hack to work around references +
for i in range(len(l)-1):
for j in dfdf:
k = j[:]
output.append(k)
# hack -
for i in range(0, len(l)):
for l1 in
output[i*len(output)/len(l):((i+1)*len(output)/len(l))]:
l1.append(l[i])
print output
--------------------------------------------------------------------------------------------------------------------
hope that helps !
cheers,
amit.
> hello ppl,
>
> Consider a list like ['a.1','b.3','b.4','c.2']. Here 'a','b','c' are
> objects and 1,3,4,2 are their instance ids and they are unique e.g. a.1
> and b.1 cannot exist together. From this list i want to generate
> multiple lists such that each list must have one and only one instance of
> every object.
> Thus, for the above list, my output should be:
> [['a.1','b.3','c.2'],['a.1','b.4','c.2']]
> Another example: Let l = ['a.1','b.3','b.4','c.2','c.6','d.3']. Then
> output should be [['a.1','b.3','c.2','d.3'],['a.1','b.3','c.6','d.3'],
> ['a.1','b.4','c.2','d.3'],[['a.1','b.4','c.6','d.3']
>
> Can anyone suggest me a time-efficient method for doing this??
>
> TIA,
> girish
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
--
----
Amit Khemka -- onyomo.com
Home Page: www.cse.iitd.ernet.in/~csd00377
Endless the world's turn, endless the sun's Spinning, Endless the quest;
I turn again, back to my own beginning, And here, find rest.
--
http://mail.python.org/mailman/listinfo/python-list
