sorting

[ashishbathini]

I am very new to python ... I am using windows xp

i am writing a program in python , in which i want to sort the first elements of say 5 arrays

eg :

a = [3,2,1]
b=[7,5,3]
c=[56,242,4]
r=[3,146,124]

so i used zip to make them in to a single array

t= zip(a,b,c,d)

which = >
t= (a[0],b[0],c[0],r[0]),a[1],b[1],............r( 2))

now i used y=t(:1)
=> y = (a[0],b[0],c[0])


now if i say
y.sort()
print y


the result is y but its not gettin sorted

[bartonc]

I am very new to python ... I am using windows xp

i am writing a program in python , in which i want to sort the first elements of say 5 arrays

eg :

a = [3,2,1]
b=[7,5,3]
c=[56,242,4]
r=[3,146,124]

so i used zip to make them in to a single array

t= zip(a,b,c,d)

which = >
t= (a[0],b[0],c[0],r[0]),a[1],b[1],............r( 2))

now i used y=t(:1)
=> y = (a[0],b[0],c[0])


now if i say
y.sort()
print y


the result is y but its not gettin sorted

I didn't try zip(). I simply add the lists together:[CODE=python]a = [3, 2, 1]
b = [7, 5, 3]
c = [56, 242, 4]
r = [3, 146, 124]

t = a + b + c + r
print t
# [3, 2, 1, 7, 5, 3, 56, 242, 4, 3, 146, 124]
t.sort()
print t
# [1, 2, 3, 3, 3, 4, 5, 7, 56, 124, 146, 242][/CODE]

[ashishbathini]

I didn't try zip(). I simply add the lists together:[CODE=python]a = [3, 2, 1]
b = [7, 5, 3]
c = [56, 242, 4]
r = [3, 146, 124]

t = a + b + c + r
print t
# [3, 2, 1, 7, 5, 3, 56, 242, 4, 3, 146, 124]
t.sort()
print t
# [1, 2, 3, 3, 3, 4, 5, 7, 56, 124, 146, 242][/CODE]

here what i'm trying to do is ......
i want to sort the elements

a[o],b[0].c[0]

thats all ... i dont want to sort all the arrays ...

[bartonc]

I didn't try zip(). I simply add the lists together:[CODE=python]a = [3, 2, 1]
b = [7, 5, 3]
c = [56, 242, 4]
r = [3, 146, 124]

t = a + b + c + r
print t
# [3, 2, 1, 7, 5, 3, 56, 242, 4, 3, 146, 124]
t.sort()
print t
# [1, 2, 3, 3, 3, 4, 5, 7, 56, 124, 146, 242][/CODE]

If zip()ing all the nth items together is what you are really after, then this will work:[CODE=python]
a = [3, 2, 1]
b = [7, 5, 3]
c = [56, 242, 4]
r = [3, 146, 124]

t = zip(a, b, c, r)
print t
# [(3, 7, 56, 3), (2, 5, 242, 146), (1, 3, 4, 124)]
for i, intTuple in enumerate(t):
t[i] = sorted(intTuple )
print t
# [[3, 3, 7, 56], [2, 5, 146, 242], [1, 3, 4, 124]]
t.sort()
print t
# [[1, 3, 4, 124], [2, 5, 146, 242], [3, 3, 7, 56]][/CODE]

[bartonc]

If zip()ing all the nth items together is what you are really after, then this will work:[CODE=python]
a = [3, 2, 1]
b = [7, 5, 3]
c = [56, 242, 4]
r = [3, 146, 124]

t = zip(a, b, c, r)
print t
# [(3, 7, 56, 3), (2, 5, 242, 146), (1, 3, 4, 124)]
for i, intTuple in enumerate(t):
t[i] = sorted(intTuple )
print t
# [[3, 3, 7, 56], [2, 5, 146, 242], [1, 3, 4, 124]]
t.sort()
print t
# [[1, 3, 4, 124], [2, 5, 146, 242], [3, 3, 7, 56]][/CODE]

If you want to preserve the original lists, order them and sort them individually, you might do this:[CODE=python]
a = [3, 2, 1]
b = [7, 5, 3]
c = [56, 242, 4]
r = [3, 146, 124]

t = [a, b, c, r]
print t
# [[3, 2, 1], [7, 5, 3], [56, 242, 4], [3, 146, 124]]
# notice that t is now a list of lists, to tuples #
for intList in t:
intList.sort()
print t
# [[1, 2, 3], [3, 5, 7], [4, 56, 242], [3, 124, 146]]
t.sort()
print t
# [[1, 2, 3], [3, 5, 7], [3, 124, 146], [4, 56, 242]][/CODE]

[bartonc]

here what i'm trying to do is ......
i want to sort the elements

a[o],b[0].c[0]

thats all ... i dont want to sort all the arrays ...

If I understand correctly, in order to sort the lists ("arrays") into their proper oder, you'll need to sort the individual lists as well.

[bvdet]

I am very new to python ... I am using windows xp

i am writing a program in python , in which i want to sort the first elements of say 5 arrays

eg :

a = [3,2,1]
b=[7,5,3]
c=[56,242,4]
r=[3,146,124]

so i used zip to make them in to a single array

t= zip(a,b,c,d)

which = >
t= (a[0],b[0],c[0],r[0]),a[1],b[1],............r( 2))

now i used y=t(:1)
=> y = (a[0],b[0],c[0])


now if i say
y.sort()
print y


the result is y but its not gettin sorted

It looks like you are trying to do this:[code=Python]a = [3,2,1]
b = [7,5,3]
c = [56,242,4]
r = [3,146,124]

sort_list1 = [r,b,c,a]
sort_list1.sort ()
print sort_list1


sort_list2 = [a,b,c,r]
sort_list2.sort ()
print sort_list2[/code][code=Python]>>> [[3, 2, 1], [3, 146, 124], [7, 5, 3], [56, 242, 4]]
[[3, 2, 1], [3, 146, 124], [7, 5, 3], [56, 242, 4]]
>>> [/code]

[ashishbathini]

It looks like you are trying to do this:[code=Python]a = [3,2,1]
b = [7,5,3]
c = [56,242,4]
r = [3,146,124]

sort_list1 = [r,b,c,a]
sort_list1.sort ()
print sort_list1


sort_list2 = [a,b,c,r]
sort_list2.sort ()
print sort_list2[/code][code=Python]>>> [[3, 2, 1], [3, 146, 124], [7, 5, 3], [56, 242, 4]]
[[3, 2, 1], [3, 146, 124], [7, 5, 3], [56, 242, 4]]
>>> [/code]

in the above example if i have to print just the numbers of the first tuple
i.e

say in [[3, 2, 1], [3, 146, 124], [7, 5, 3], [56, 242, 4]]

how do i print only [3,2,1 ]
or [3,146,124]

bcos i tried

for i in range(1):
print

[bartonc]

in the above example if i have to print just the numbers of the first tuple
i.e

say in [[3, 2, 1], [3, 146, 124], [7, 5, 3], [56, 242, 4]]

how do i print only [3,2,1 ]
or [3,146,124]

bcos i tried

for i in range(1):
print

Just like this:
[CODE=python]print sort_list2[0]
# or
print sort_list2[1]
# or
for itme in sort_list2:
print item[/CODE]