Multidimensional Lists in Python

List elements can be not only strings and numbers, but also lists. In this case, such a list of lists is called multidimensional. In the following example, the list lst consists of three elements, which in turn are lists:

pythonlst = [
  ['a', 'b', 'c'],
  ['d', 'e', 'f'],
  ['g', 'h', 'i'],
]

Depending on the nesting level, lists can be two-dimensional - a list of lists, three-dimensional - a list of lists of lists (and so on - four-dimensional, five-dimensional, etc.).

The list above is two-dimensional, since inside one list there are other sublists that do not contain other lists. To output any element from a two-dimensional list, you should write not one pair of square brackets, but two:

pythonprint(lst[0][1]) # 'b'
print(lst[1][2]) # 'f'

Multidimensional lists can also contain other iterables, such as dictionaries, sets, and tuples. Let's change the second element of the list to a dictionary:

pythonlst = [
  ['a', 'b', 'c'],
  {'d': 1, 'e': 2, 'f': 3},
  ['g', 'h', 'i'],
]

To get a dictionary element, you first need to get to the dictionary itself using the first square brackets. Then, in the second square brackets, write the dictionary key:

pythonprint(lst[1]['d']) # 1

pythonlst = [
  [1, 2, 3],
  [4, 5, 6],
  [7, 8, 9],
]

pythonlst = [
  ['a', 'b'],
  {'c': 1, 'd': 2},
  {'e': 3, 'f': 4}
]