I have found the following code in Python that is doing the same work but it only replaces with manually selected synonym.
import nltk
from nltk.corpus import wordnet
synonyms = []
string="i love winter season"
for syn in wordnet.synsets("love"):
for l in syn.lemmas():
synonyms.append(l.name())
print(synonyms)
rep=synonyms[2]
st=string.replace("love",rep, 1)
print(st)
rep=synonyms[2] will be taking any synonym at index 2
What i want is to replace the selected word with its randomly selected synonym?