On Wed, Sep 23, 2009 at 10:03 PM, AggieDan04 <danb...@yahoo.com> wrote: > On Sep 23, 3:02 pm, Simon Forman <sajmik...@gmail.com> wrote: >> On Wed, Sep 23, 2009 at 1:14 PM, Rudolf <yellowblueyel...@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. >> > -- >> >http://mail.python.org/mailman/listinfo/python-list >> >> 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] > > or > > two_dimensional_list = [[]] * num_copies > -- > http://mail.python.org/mailman/listinfo/python-list >
Oh, you're right. I was thinking of the [[]] * n form. My bad. ~Simon -- http://mail.python.org/mailman/listinfo/python-list
