python - List of variable length lists -

i want have n lists of different length , refer them list. possible. example, can hard code:

list1 = [0, 2, 3, 4, 1] list2 = [1, 4, 2, 1] list4 = [1, 1, 0] 

and refer them directly, able call list[1][1] , same thing list1[1] return or have list[3][2] return error since list3 not defined (and list[3] have length 0).

is possible?

i looking way dynamically create list of lists , append various lists later.

you try initializing list

lists = [[] _ in xrange(3)] 

now when assigning elements, do:

lists[0].append(value) lists[2].append(value2) 

which add value first sublist within lists, value2 third sublist , on..

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you can use approach dict also.

>>> data = {'list%i' % : [] in range(4)} >>> data {'list0': [], 'list1': [], 'list2': [], 'list3': []} 

so append items in list way

>>> data['list1'].append(1) >>> data {'list0': [], 'list1': [1], 'list2': [], 'list3': []}