使用 NLTK 计算语料库中单词列表的频率

Question

I have downloaded a corpus and tokenised the words. I have a list of the main characters and I want to find out how many times each name appears in the corpus. I have tried using a frequency function with a dictionary but I don't know how to get the name count..

character_list = ['Myriel','Bishop','Baptistine','Magloire','Cravatte','Valjean','Gervais','Fantine','Tholomyès'
                  ,'Blachevelle','Dahlia','Fameuil','Favourite','Listolier','Zéphine','Cosette','Thénardier',
                  'Éponine','Azelma','Javert','Fauchelevent','Bamatabois','Champmathieu',
                  'Brevet','Simplice','Chenildieu','Cochepaille','Innocente','Reverend','Ascension','Crucifixion',
                  'Gavroche','Magnon',
                  'Gillenormand','Marius','Colonel','Mabeuf','Enjolras','Combeferre','Prouvaire',
                 'Feuilly','Courfeyrac','Bahorel','Lesgle','Joly','Grantaire','Patron-Minette','Brujon',
                 'Toussaint'] 


fdist_mis = FreqDist(word_tokens)

filtered_word_freqt = dict((character_list, freq) for character_list, freq in fdist_mis.items())

When I explore filtered_word_freqt, it just returns all of the word tokens instead of a dictionary of the unique characters and their occurrences. Any help? Thanks a lot.

Answer 1

How would you like to see the frequency? You can get a count of # times each word was seen or a ratio of how often within the total text or even a fancy formatted table. Relevant functions copied from here :

N()[source]
Return the total number of sample outcomes that have been recorded by this FreqDist. For the number of unique sample values (or bins) with counts greater than zero, use FreqDist.B().
Return type:    int

freq(sample)[source]
Return the frequency of a given sample. The frequency of a sample is defined as the count of that sample divided by the total number of sample outcomes that have been recorded by this FreqDist. The count of a sample is defined as the number of times that sample outcome was recorded by this FreqDist. Frequencies are always real numbers in the range [0, 1].

tabulate(*args, **kwargs)[source]
Tabulate the given samples from the frequency distribution (cumulative), displaying the most frequent sample first. If an integer parameter is supplied, stop after this many samples have been plotted.
Parameters: samples (list) – The samples to plot (default is all samples)