how to get first 10 items in a dictionary in python code example

Example 1: how to make every item compare the rest items of list in python

for i in range(len(mylist)):
    for j in range(i + 1, len(mylist)):
        compare(mylist[i], mylist[j])

Example 2: get first and last item list c#

List<string> _ids = new List<string>() { "aaa", "bbb", "ccc", "ddd" };
var first = _ids.First();
var last = _ids.Last();
Console.WriteLine(first);
Console.WriteLine(last);