Word Frequency

In order to obtain the frequency of words in your document you can use the TextChunk class word frequency tool. Word frequency lets you know how common a word is.

After you've installed the Lettria package on Python you'll need to import the library.

import lettria

Next you are going to need to include your personal API key which can be found

via the Lettria platform in the dashboard.

api_key = 'your personal API key'
nlp = lettria.NLP(api_key)

Now you will need to open your saved document. Be sure to add the name of

‘your file’ since it may differ from the name of my example file.

with open("example.txt", "r") as f:
	example_data = f.readlines()

Next, add the document to the NLP.

nlp.add_document(example_data)

In order to extract the word frequency from this document use the following command:

word_frequency = nlp.word_frequency
word_frequency(filter_pos = None, lemma=False)

In the results you will have a list of words, part of speech and the inverse document frequency.

If you would like to filter out parts of speech such as ‘noun’ you can change the filter criteria.

word_frequency = nlp.word_frequency
word_frequency(filter_pos = 'N', lemma=False)

Now you can see within the results all the words and number of occurrences falling under ‘noun’ has been filtered out.

In order to save your results you can use the following command.

nlp.save_results(‘example_results')

And a json file with your results that can be used for further analysis will be saved.

import lettria

api_key = 'your personal API key'
nlp = lettria.NLP(api_key)

with open("example.txt", "r") as f:
	example_data = f.readlines()

nlp.add_document(example_data)

word_frequency = nlp.word_frequency
word_frequency(filter_pos = None, lemma=False)

word_frequency = nlp.word_frequency
word_frequency(filter_pos = 'N', lemma=False)

nlp.save_results(‘example_results')