擅长:python、mysql、java
<p>这里有一个方法可以帮助您:</p>
<pre><code>''' Returns the frequency of letters '''
def get_freq_letters(words):
fdist = nltk.FreqDist([char.lower() for word in words for char in word if char.isalpha()])
freq_letters = {}
for key,value in fdist.iteritems():
freq_letters[key] = value
return freq_letters
</code></pre>