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NAMEBio::DB::NCBIHelper - A collection of routines useful for queries to NCBI databases.SYNOPSIS# Do not use this module directly. # get a Bio::DB::NCBIHelper object somehow my $seqio = $db->get_Stream_by_acc(['J00522']); foreach my $seq ( $seqio->next_seq ) { # process seq } DESCRIPTIONProvides a single place to setup some common methods for querying NCBI web databases. This module just centralizes the methods for constructing a URL for querying NCBI GenBank and NCBI GenPept and the common HTML stripping done in postprocess_data().The base NCBI query URL used is: https://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi FEEDBACKMailing ListsUser feedback is an integral part of the evolution of this and other Bioperl modules. Send your comments and suggestions preferably to one of the Bioperl mailing lists. Your participation is much appreciated.bioperl-l@bioperl.org - General discussion http://bioperl.org/wiki/Mailing_lists - About the mailing lists SupportPlease direct usage questions or support issues to the mailing list:bioperl-l@bioperl.org rather than to the module maintainer directly. Many experienced and reponsive experts will be able look at the problem and quickly address it. Please include a thorough description of the problem with code and data examples if at all possible. Reporting BugsReport bugs to the Bioperl bug tracking system to help us keep track the bugs and their resolution. Bug reports can be submitted via the web.https://github.com/bioperl/bioperl-live/issues AUTHOR - Jason StajichEmail jason@bioperl.orgAPPENDIXThe rest of the documentation details each of the object methods. Internal methods are usually preceded with a _newTitle : new Usage : Function: the new way to make modules a little more lightweight Returns : Args : get_paramsTitle : get_params Usage : my %params = $self->get_params($mode) Function: returns key,value pairs to be passed to NCBI database for either 'batch' or 'single' sequence retrieval method Returns : a key,value pair hash Args : 'single' or 'batch' mode for retrieval default_formatTitle : default_format Usage : my $format = $self->default_format Function: returns default sequence format for this module Returns : string Args : none get_requestTitle : get_request Usage : my $url = $self->get_request Function: HTTP::Request Returns : Args : %qualifiers = a hash of qualifiers (ids, format, etc) get_seq_streamTitle : get_seq_stream Usage : my $seqio = $self->get_seq_stream(%qualifiers) Function: builds a url and queries a web db Returns : a Bio::SeqIO stream capable of producing sequence Args : %qualifiers = a hash qualifiers that the implementing class will process to make a url suitable for web querying get_Stream_by_batchTitle : get_Stream_by_batch Usage : $seq = $db->get_Stream_by_batch($ref); Function: Retrieves Seq objects from Entrez 'en masse', rather than one at a time. For large numbers of sequences, this is far superior than get_Stream_by_id or get_Stream_by_acc. Example : Returns : a Bio::SeqIO stream object Args : $ref : either an array reference, a filename, or a filehandle from which to get the list of unique ids/accession numbers. NOTE: deprecated API. Use get_Stream_by_id() instead. get_Stream_by_queryTitle : get_Stream_by_query Usage : $seq = $db->get_Stream_by_query($query); Function: Retrieves Seq objects from Entrez 'en masse', rather than one at a time. For large numbers of sequences, this is far superior to get_Stream_by_id and get_Stream_by_acc. Example : Returns : a Bio::SeqIO stream object Args : An Entrez query string or a Bio::DB::Query::GenBank object. It is suggested that you create a Bio::DB::Query::GenBank object and get the entry count before you fetch a potentially large stream. postprocess_dataTitle : postprocess_data Usage : $self->postprocess_data ( 'type' => 'string', 'location' => \$datastr ); Function: Process downloaded data before loading into a Bio::SeqIO. This works for Genbank and Genpept, other classes should override it with their own method. Returns : void Args : hash with two keys: 'type' can be 'string' or 'file' 'location' either file location or string reference containing data request_formatTitle : request_format Usage : my ($req_format, $ioformat) = $self->request_format; $self->request_format("genbank"); $self->request_format("fasta"); Function: Get/Set sequence format retrieval. The get-form will normally not be used outside of this and derived modules. Returns : Array of two strings, the first representing the format for retrieval, and the second specifying the corresponding SeqIO format. Args : $format = sequence format redirect_refseqTitle : redirect_refseq Usage : $db->redirect_refseq(1) Function: simple getter/setter which redirects RefSeqs to use Bio::DB::RefSeq Returns : Boolean value Args : Boolean value (optional) Throws : 'unparseable output exception' Note : This replaces 'no_redirect' as a more straightforward flag to redirect possible RefSeqs to use Bio::DB::RefSeq (EBI interface) instead of retrieving the NCBI records complexityTitle : complexity Usage : $db->complexity(3) Function: get/set complexity value Returns : value from 0-4 indicating level of complexity Args : value from 0-4 (optional); if unset server assumes 1 Throws : if arg is not an integer or falls outside of noted range above Note : From efetch docs, the complexity regulates the display: 0 - get the whole blob 1 - get the bioseq for gi of interest (default in Entrez) 2 - get the minimal bioseq-set containing the gi of interest 3 - get the minimal nuc-prot containing the gi of interest 4 - get the minimal pub-set containing the gi of interest strandTitle : strand Usage : $db->strand(1) Function: get/set strand value Returns : strand value if set Args : value of 1 (plus) or 2 (minus); if unset server assumes 1 Throws : if arg is not an integer or is not 1 or 2 Note : This differs from BioPerl's use of strand: 1 = plus, -1 = minus 0 = not relevant. We should probably add in some functionality to convert over in the future. seq_startTitle : seq_start Usage : $db->seq_start(123) Function: get/set sequence start location Returns : sequence start value if set Args : integer; if unset server assumes 1 Throws : if arg is not an integer seq_stopTitle : seq_stop Usage : $db->seq_stop(456) Function: get/set sequence stop (end) location Returns : sequence stop (end) value if set Args : integer; if unset server assumes 1 Throws : if arg is not an integer Title : email Usage : $db->email('foo@bar.edu') Function: get/set email value Returns : email (string) or undef Args : string with a valid email address; note we do not vallidate this currently! Throws : if arg is not an integer or falls outside of noted range above Note : This is required if you wish to speed up mulltiple requests faster than 4s per request. Bio::DB::WebDBSeqI methodsOverriding WebDBSeqI method to help newbies to retrieve sequencesget_Stream_by_accTitle : get_Stream_by_acc Usage : $seq = $db->get_Stream_by_acc([$acc1, $acc2]); Function: gets a series of Seq objects by accession numbers Returns : a Bio::SeqIO stream object Args : $ref : a reference to an array of accession numbers for the desired sequence entries Note : For GenBank, this just calls the same code for get_Stream_by_id() delay_policyTitle : delay_policy Usage : $secs = $self->delay_policy Function: NCBI requests a delay of 4 seconds between requests unless email is provided. This method implements a 4 second delay; use 'delay()' to override, though understand if no email is provided we are not responsible for users being IP-blocked by NCBI Returns : number of seconds to delay Args : none cookieTitle : cookie Usage : ($cookie,$querynum) = $db->cookie Function: return the NCBI query cookie, this information is used by Bio::DB::GenBank in conjunction with efetch, ripped from Bio::DB::Query::GenBank Returns : list of (cookie,querynum) Args : none _parse_responseTitle : _parse_response Usage : $db->_parse_response($content) Function: parse out response for cookie, this is a trimmed-down version of _parse_response from Bio::DB::Query::GenBank Returns : empty Args : none Throws : 'unparseable output exception' no_redirectTitle : no_redirect Usage : $db->no_redirect($content) Function: DEPRECATED - Used to indicate that Bio::DB::GenBank instance retrieves possible RefSeqs from EBI instead; default behavior is now to retrieve directly from NCBI Returns : None Args : None Throws : Method is deprecated in favor of positive flag method 'redirect_refseq'
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