Data science, I'm sorry to say, often involves cleaning up input data into a usable and uniform format. Command line tools like grep, awk and sed provide an arcane power to manipulate text in files of arbitrary size. Mastering these tools can separate data science novices from data scientists with …
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Often when working with text documents it is useful to filter out words that occur frequently in all documents (e.g. 'the', 'is', ...). These words, called stop words, don't give any special hint about the document's content. The nltk (Natural Language Toolkit) library for python includes a list of stop …
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