Python | NLTK NLTK . token ize . conditionalreqdist()
原文:https://www . geeksforgeeks . org/python-nltk-nltk-token ize-conditionalforgedist/
借助**nltk.tokenize.ConditionalFreqDist()**方法，我们可以用tokenize.ConditionalFreqDist()方法统计一个句子中单词的出现频率。
语法:
tokenize.ConditionalFreqDist()返回: 返回字典中单词的频率分布。
例#1 :
在这个例子中我们可以看到，通过使用tokenize.ConditionalFreqDist()方法，我们能够统计一个句子中单词的出现次数。
# import ConditionalFreqDist() method from nltk
from nltk.probability import ConditionalFreqDist
from nltk.tokenize import word_tokenize
# Create a reference variable for Class SExprTokenizer
tk = ConditionalFreqDist()
# Create a string input
gfg = "Geeks for Geeks"
for word in word_tokenize(gfg):
condition = len(word)
tk[condition][word] += 1
print(tk)
输出:
FreqDist({“极客”:2，“for”:1 })
例 2 :
# import ConditionalFreqDist() method from nltk
from nltk.probability import ConditionalFreqDist
from nltk.tokenize import word_tokenize
# Create a reference variable for Class SExprTokenizer
tk = ConditionalFreqDist()
# Create a string input
gfg = "G F G"
for word in word_tokenize(gfg):
condition = len(word)
tk[condition][word] += 1
print(tk)
输出:
freqdis({ ' g ':' 2，' f ':' 1 })
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