All problems
Most Frequent Token Tiebreak
Problem
The most frequent token is the mode; on ties, prefer the token that appears first in the text (stable selection).
Given the token list, return the most frequent token, or None for an empty list.
Hint
Update the best token only on a strict improvement.
Test cases
case 1
in: [["a","b","b","a"]]
expected: "b"
case 2
in: [["x","y"]]
expected: "x"
case 3
in: [[]]
expected: null
Starter codePython
def most_frequent_token_tiebreak(tokens):
# Your code here
pass3 test cases · run your code against them in the editor