"Moos Heintzen" <iwasr...@gmail.com> wrote
>>> d = [[]]
>>> d[0][0]=1
IndexError: list assignment index out of range
>>> d[0].append(1)
>>> d
[[1]]
I guess I can't reference [0] on an empty list.
Thats right. You can't assign a value to a position in
a list that hasn't been created yet. It has nothing to
do with nesting, its the same for a simople lust:
lst = []
lst[0] = 66
Traceback (most recent call last):
File "<input>", line 1, in <module>
IndexError: list assignment index out of range
lst.append(66)
lst
[66]
You can also use insert, which takes an index.
But if the index is non existent it appends...
lst2 = []
lst2.insert(3,66)
lst2
[66]
lst.insert(3,66)
lst
[66, 66]
HTH,
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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