Path-based Similarity: It is a similarity measure that finds the distance that is the length of the shortest path between two synsets.
Leacock Chordorow (LCH) : It is a similarity measure which is an extended version of Path-based similarity as it incorporates the depth of the taxonomy. Therefore, it is the negative log of the shortest path (spath) between two concepts (synset_1 and synset_2) divided by twice the total depth of the taxonomy (D) as defined in fig below.
Code #1 : Introducing Synsets.
from nltk.corpus import wordnet
syn1 = wordnet.synsets('hello')[0]
syn2 = wordnet.synsets('selling')[0]
print ("hello name : ", syn1.name())
print ("selling name : ", syn2.name())
|
Output :
hello name : hello.n.01 selling name : selling.n.01
Code #2 : Path Similarity
syn1.path_similarity(syn2) |
Output :
0.08333333333333333
Code #3 : Leacock Chordorow (LCH) Similarity
syn1.lch_similarity(syn2) |
Output :
1.1526795099383855