Luhmann wrote:
I'd suggest you load all your data into a list of lists, then use the
.sort() method to sort it.
The sort method takes a key= argument, which should be a function that
does some transformation to your data, then returns something to be
compared.
for instance:
>>> l=[[1,2,3],[2,3,4],[0,9,1]]
>>> def cp(a):
return a[2]
>>> l
[[0, 9, 1], [1, 2, 3], [2, 3, 4]]
>>> def cp(a):
return a[1]
>>> l.sort(key=cp)
>>> l
[[1, 2, 3], [2, 3, 4], [0, 9, 1]]
>>> def cp(a):
return a[0]
>>> l.sort(key=cp)
>>> l
[[0, 9, 1], [1, 2, 3], [2, 3, 4]]
>>>
Actually, I was fooling around with that today by adding to the list
from the file and then sort. I was using the following simplify method:
newlist = []
newlist = [
456, 54, 8, 158, 878
]
(above data read from file)
newlist.sort()
print newlist
[8, 54, 158, 456, 878]
(still working adding to new file]
The actual sorted list has, as I recall, an apostrophe at the beginning
and an \n at the end of every number I had. I will be working on that.
Thanks for your suggestion.
Ken
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