By Jacob Perkins

This publication is meant for Python programmers drawn to studying the way to do normal language processing. might be you’ve realized the bounds of normal expressions the challenging means, or you’ve learned that human language can't be deterministically parsed like a working laptop or computer language. possibly you may have extra textual content than you recognize what to do with, and wish computerized how one can study and constitution that textual content. This Cookbook will make it easier to teach and use statistical language versions to strategy textual content in ways in which are essentially most unlikely with general programming instruments. A uncomplicated wisdom of Python and the elemental textual content processing options is anticipated. a few event with standard expressions can be invaluable.

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In this recipe, we will take on the less extreme case of correcting minor spelling issues using Enchant—a spelling correction API. Getting ready You will need to install Enchant and a dictionary for it to use. com/projects/enchant/. net/. org/pyenchant/ You should be able to install it with the easy_install command that comes with Python setuptools, such as by typing sudo easy_install pyenchant on Linux or Unix. On a Mac machine, PyEnchant may be difficult to install. html. 39 Replacing and Correcting Words How to do it...

The repeat_regexp pattern matches three groups: ff 0 or more starting characters (\w*) ff A single character (\w) that is followed by another instance of that character (\2) ff 0 or more ending characters (\w*) The replacement string is then used to keep all the matched groups, while discarding the backreference to the second group. So, the word looooove gets split into (looo)(o)o(ve) and then recombined as loooove, discarding the last o. This continues until only one o remains, when repeat_regexp no longer matches the string and no more characters are removed.

This tree can be traced all the way up to a root hypernym. Hypernyms provide a way to categorize and group words based on their similarity to each other. 01')] As you can see, reference_book is a hypernym of cookbook, but cookbook is only one of the many hyponyms of reference_book. And all these types of books have the same root hypernym, which is entity, one of the most abstract terms in the English language. 01')]] 19 Tokenizing Text and WordNet Basics The hypernym_paths() method returns a list of lists, where each list starts at the root hypernym and ends with the original Synset.

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