EasyNLPnlp-016

Type-Token Ratio

Problem

Return the type-token ratio: the number of distinct tokens divided by the total number of tokens.

Return 0.0 when the token list is empty.

Hint

Types are unique tokens; divide by the token count.

case 1

in: [["a","b","c","a"]]

expected: 0.75

case 2

in: [["a","a","a"]]

expected: 0.3333333333333333

case 3

in: [[]]

expected: 0

case 4

in: [["the","cat","sat","on","the","mat"]]

expected: 0.8333333333333334

Starter codePython

def type_token_ratio(tokens):
    # Your code here
    pass

4 test cases · run your code against them in the editor