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Computing in 571

Computing in 571. Programming. For standalone code, you can use anything you like That runs on the department cluster For some exercises, we will use a Python-based toolikt. Department Cluster. Resources on CLMA wiki http://depts.washington.edu/uwcl/twiki/bin/view.cgi/ Main

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Computing in 571

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  1. Computing in 571

  2. Programming • For standalone code, you can use anything you like • That runs on the department cluster • For some exercises, we will use a Python-based toolikt

  3. Department Cluster • Resources on CLMA wiki • http://depts.washington.edu/uwcl/twiki/bin/view.cgi/Main • Installed corpora, software, etc. • patas.ling.washington.edu • dryas.ling.washington.edu

  4. Condor • Distributes software processes to cluster nodes • All homework will be tested with condor_submit • See documentation on CLMA wiki • Construction of condor scripts

  5. NLTK • Natural Language Toolkit (NLTK) • Large, integrated, fairly comprehensive • Stemmers • Taggers • Parsers • Semantic analysis • Corpus samples, etc • Extensively documented • Pedagogically oriented • Implementations strive for clarity • Sometimes at the expense of speed/efficiency

  6. NLTK Information • http://www.nltk.org • Online book • Demos of software • HOWTOs for specific components • API information, etc

  7. Python & NLTK • NLTK is installed on cluster • Use python2.6 with NLTK • NLTK data is also installed • /corpora/nltk/nltk-data • NLTK is written in Python • http://www.python.org; http://docs.python.org • Many good online intros, fairly simple

  8. Python & NLTK • Interactive mode allows experimentation, introspection • patas$ python2.6 • >>> import nltk • >>> dir(nltk) • ….. AbstractLazySequence', 'AffixTagger', 'AnnotationTask', 'Assignment', 'BigramAssocMeasures', 'BigramCollocationFinder', 'BigramTagger', 'BinaryMaxentFeatureEncoding', • >>> help(AffixTagger) • …… • Prints properties, methods, comments,…

  9. Turning in Homework • Class CollectIt • Linked from course webpage • Homeworks due Tuesday night • CollectIt time = Wednesday (00:01) • Should submit as hw#.tar • Where # = homework number • Tar file contains top-level condor scripts to run

  10. Programming with NLTK

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