arrays in python
sajmikins at gmail.com
Thu Sep 24 05:22:15 CEST 2009
On Wed, Sep 23, 2009 at 10:03 PM, AggieDan04 <danb_83 at yahoo.com> wrote:
> On Sep 23, 3:02 pm, Simon Forman <sajmik... at gmail.com> wrote:
>> On Wed, Sep 23, 2009 at 1:14 PM, Rudolf <yellowblueyel... at gmail.com> wrote:
>> > Can someone tell me how to allocate single and multidimensional arrays
>> > in python. I looked online and it says to do the following x =
>> > ['1','2','3','4']
>> > However, I want a much larger array like a 100 elements, so I cant
>> > possibly do that. I want to allocate an array and then populate it
>> > using a for loop. Thanks for your help.
>> > --
>> In python they're called 'lists'. There are C-style array objects but
>> you don't want to use them unless you specifically have to.
>> But if you do this:
>> two_dimensional_list = [  for var in some_iterable]
>> The list of lists you create thereby will contain multiple references
>> to the /same/ inner list object.
> No, that creates a list of distinct empty lists. If you want multiple
> references to the same inner list, it's
> inner_list = 
> two_dimensional_list = [inner_list for var in some_iterable]
> two_dimensional_list = [] * num_copies
Oh, you're right. I was thinking of the [] * n form. My bad.
More information about the Python-list