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python Programming Glossary: rechttp://stackoverflow.com/questions/10062954/valueerror-the-truth-value-of-an-array-with-more-than-one-element-is-ambiguous of a logical AND . I changed the code from r mlab.csv2rec datafile delimiter ' ' names COL_HEADERS mask r dt startdate.. r dt startdate r dt enddate selected r mask TO r mlab.csv2rec datafile delimiter ' ' names COL_HEADERS mask r dt startdate.. matplotlib share improve this question r is a numpy rec array. So r dt startdate is also a boolean array. For numpy..
Handle generator exceptions in its consumer http://stackoverflow.com/questions/11366892/handle-generator-exceptions-in-its-consumer reads data in different formats. All formats are line or record oriented and for each format there's a dedicated parsing.. reads its respective format from the input and delivers records back to the main function def read stream parsefunc for.. back to the main function def read stream parsefunc for record in parsefunc stream do_stuff record where parsefunc is something..
Simple implementation of N-Gram, tf-idf and Cosine similarity in Python http://stackoverflow.com/questions/2380394/simple-implementation-of-n-gram-tf-idf-and-cosine-similarity-in-python you how to comute tf.idf # reader lucene.IndexReader FSDirectory.open index_loc docs reader.numDocs for i in xrange docs.. docs tfv reader.getTermFreqVector i fieldname if tfv rec terms tfv.getTerms frequencies tfv.getTermFrequencies for t.. of docs with the given term tmap.setdefault t len tmap rec t sim.tf f sim.idf df max_doc #compute TF.IDF # and normalize..
How to convert list into a string? http://stackoverflow.com/questions/2906092/how-to-convert-list-into-a-string open ' ddfs user data k ktrip_01 hmm_write.txt' 'w' buffer rec file.readlines for line in rec field line.split print ' ' field.. hmm_write.txt' 'w' buffer rec file.readlines for line in rec field line.split print ' ' field 0 term field 0 buffer.append..
Can a lambda function call itself recursively in Python? http://stackoverflow.com/questions/481692/can-a-lambda-function-call-itself-recursively-in-python a lambda function call itself recursively in Python A regular function can contain a call to.. name to refer back to. Is there a way to do it How python recursion lambda y combinator share improve this question The.. single unnamed lambda map lambda n lambda f a f f a lambda rec n 1 if n 0 else n rec rec n 1 n range 10 1 1 2 6 24 120 720..
Efficient way of parsing fixed width files in Python http://stackoverflow.com/questions/4914008/efficient-way-of-parsing-fixed-width-files-in-python fmtstring parse fieldstruct.unpack_from print 'fmtstring r recsize chars'.format fmtstring fieldstruct.size line 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.. 'fields '.format fields Output fmtstring '2s 10x 24s' recsize 36 chars fields 'AB' 'MNOPQRSTUVWXYZ0123456789' Update 1.. make_parser fieldwidths fields parse line print 'format r rec size chars'.format parse.fmtstring parse.size print 'fields..
Is there a function to make scatterplot matrices in matplotlib? http://stackoverflow.com/questions/7941207/is-there-a-function-to-make-scatterplot-matrices-in-matplotlib If you're always going to be working with structured or rec arrays then you can simplify this a touch. i.e. There's always..
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