how to make a list python
list = ['list element', 'list element']
# or t obe more effecient:
import numpy #if you do not have numpy, do "pip install numpy"
numpyarray = numpy.array(['array element', 'array element'])
#a numpy array is faster than a standard listarraylist of arraylist
public static void main(String[] args) {
ArrayList<ArrayList<Integer>> outer = new ArrayList<ArrayList<Integer>>();
ArrayList<Integer> inner = new ArrayList<Integer>();
inner.add(100);
inner.add(200);
outer.add(inner); // add first list
inner = new ArrayList<Integer>(inner); // create a new inner list that has the same content as
// the original inner list
outer.add(inner); // add second list
outer.get(0).add(300); // changes only the first inner list
System.out.println(outer);
}Copyright © 2021 Codeinu
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