# # commoncode.py # ENRAGE # import random, string import sqlite3 as sqlite from time import strftime from array import array commoncodeVersion = 5.5 currentRDSversion = 1.1 import tempfile, shutil, os from os import environ if environ.get("CISTEMATIC_TEMP"): cisTemp = environ.get("CISTEMATIC_TEMP") else: cisTemp = '/tmp' tempfile.tempdir = cisTemp def writeLog(logFile, messenger, message): """ create a log file to write a message from a messenger or append to an existing file. """ try: logfile = open(logFile) except IOError: logfile = open(logFile, 'w') else: logfile = open(logFile, 'a') logfile.writelines('%s: [%s] %s\n' % (strftime("%Y-%m-%d %H:%M:%S"), messenger, message)) logfile.close() def getMergedRegions(regionfilename, maxDist=1000, minHits=0, verbose=False, keepLabel=False, fullChrom = False, chromField=1, scoreField=4, pad=0, compact=False, doMerge=True, keepPeak=False, returnTop=0): """ returns a list of merged overlapping regions; can optionally filter regions that have a scoreField fewer than minHits. Can also optionally return the label of each region, as well as the peak, if supplied (peakPos and peakHeight should be the last 2 fields). Can return the top regions based on score if higher than minHits. """ regions = {} infile = open(regionfilename) lines = infile.readlines() hasPvalue = 0 hasShift = 0 if 0 < returnTop < len(lines): scores = [] for line in lines: if line[0] == '#': if 'pvalue' in line: hasPvalue = 1 if 'readShift' in line: hasShift = 1 continue fields = line.strip().split('\t') if fields[0]=='chr': continue hits = float(fields[scoreField].strip()) scores.append(hits) scores.sort() returnTop = -1 * returnTop minScore = scores[returnTop] if minScore > minHits: minHits = minScore mergeCount = 0 chromField = int(chromField) count = 0 for line in lines: if line[0] == '#': if 'pvalue' in line: hasPvalue = 1 if 'readShift' in line: hasShift = 1 continue fields = line.strip().split('\t') #print fields if minHits >= 0: try: hits = float(fields[scoreField].strip()) except: continue if hits < minHits: continue if compact: (chrom, pos) = fields[chromField].split(':') if not fullChrom: chrom = chrom[3:] (front, back) = pos.split('-') start = int(front) stop = int(back) elif chromField > 1: label = string.join(fields[:chromField],'\t') if fullChrom: chrom = fields[chromField] else: chrom = fields[chromField][3:] start = int(fields[chromField + 1]) - pad stop = int(fields[chromField + 2]) + pad else: label = fields[0] if fullChrom: chrom = fields[chromField] else: chrom = fields[chromField][3:] start = int(fields[chromField+1]) - pad stop = int(fields[chromField+2]) + pad length = abs(stop - start) if keepPeak: peakPos = int(fields[-2 - hasPvalue - hasShift]) peakHeight = float(fields[-1 - hasPvalue - hasShift]) if chrom not in regions: regions[chrom] = [] merged = False if doMerge and len(regions[chrom]) > 0: for index in range(len(regions[chrom])): if keepLabel and keepPeak: (rlabel, rstart, rstop, rlen, rpeakPos, rpeakHeight) = regions[chrom][index] elif keepLabel: (rlabel, rstart, rstop, rlen) = regions[chrom][index] elif keepPeak: (rstart, rstop, rlen, rpeakPos, rpeakHeight) = regions[chrom][index] else: (rstart, rstop, rlen) = regions[chrom][index] midpoint = (rstart + rstop) / 2 #if abs(midpoint - start) < maxDist or abs(midpoint - stop) < maxDist or start == rstart or stop == rstop: if (rstart <= start <= rstop) or (rstart <= stop <= rstop) or (start <= rstart <= stop) or (start <= rstop <= stop): if start < rstart: rstart = start if rstop < stop: rstop = stop rlen = abs(rstop - rstart) if keepPeak: if peakHeight > rpeakHeight: rpeakHeight = peakHeight rpeakPos = peakPos if keepLabel and keepPeak: regions[chrom][index] = (label, rstart, rstop, rlen, rpeakPos, rpeakHeight) elif keepLabel: regions[chrom][index] = (label, rstart, rstop, rlen) elif keepPeak: regions[chrom][index] = (rstart, rstop, rlen, rpeakPos, rpeakHeight) else: regions[chrom][index] = (rstart, rstop, rlen) #print (rstart, rstop, rlen) mergeCount += 1 merged = True break if not merged: if keepLabel and keepPeak: regions[chrom].append((label, start, stop, length, peakPos, peakHeight)) elif keepLabel: regions[chrom].append((label, start, stop, length)) elif keepPeak: regions[chrom].append((start, stop, length, peakPos, peakHeight)) else: regions[chrom].append((start, stop, length)) count += 1 if verbose and (count % 100000 == 0): print count infile.close() regionCount = 0 for chrom in regions: regionCount += len(regions[chrom]) if keepLabel: regions[chrom].sort(cmp=lambda x,y:cmp(x[1], y[1])) else: regions[chrom].sort() if verbose: print 'merged %d times' % mergeCount print 'returning %d regions' % regionCount return regions def findPeak(hitList, start, length, readlen=25, doWeight=False, leftPlus=False, shift=0, returnShift=False, maxshift=75): """ find the peak in a list of reads (hitlist) in a region of a given length and absolute start point. returns a list of peaks, the number of hits, a triangular-smoothed version of hitlist, and the number of reads that are forward (plus) sense. If doWeight is True, weight the reads accordingly. If leftPlus is True, return the number of plus reads left of the peak, taken to be the first TopPos position. """ seqArray = array('f', [0.] * length) smoothArray = array('f', [0.] * length) numHits = 0. numPlus = 0. regionArray = [] # TO DO: pick best shift for region if shift == 'auto': bestShift = 0 lowestScore = 20000000000 for testShift in xrange(maxshift + 1): shiftArray = array('f', [0.] * length) for read in hitList: currentpos = read[0] - start if read[1] == '+': currentpos += testShift else: currentpos -= testShift if (currentpos < 1) or (currentpos >= length): continue if doWeight: weight = read[2] else: weight = 1.0 if read[1] == '+': shiftArray[currentpos] += weight else: shiftArray[currentpos] -= weight currentScore = 0 for score in shiftArray: currentScore += abs(score) if currentScore < lowestScore: bestShift = testShift lowestScore = currentScore shift = bestShift # once we have the best shift, compute seqArray for read in hitList: currentpos = read[0] - start if read[1] == '+': currentpos += shift else: currentpos -= shift if (currentpos < 1 - readlen) or (currentpos >= length): continue hitIndex = 0 if doWeight: weight = read[2] else: weight = 1.0 numHits += weight if leftPlus: regionArray.append(read) while currentpos < 0: hitIndex += 1 currentpos += 1 while hitIndex < readlen and currentpos < length: seqArray[currentpos] += weight hitIndex += 1 currentpos += 1 if read[1] == '+': numPlus += weight # implementing a triangular smooth for pos in range(2,length -2): smoothArray[pos] = (seqArray[pos -2] + 2 * seqArray[pos - 1] + 3 * seqArray[pos] + 2 * seqArray[pos + 1] + seqArray[pos + 2]) / 9.0 topNucleotide = 0 topPos = [] for currentpos in xrange(length): if topNucleotide < smoothArray[currentpos]: topNucleotide = smoothArray[currentpos] topPos = [currentpos] elif topNucleotide == smoothArray[currentpos]: topPos.append(currentpos) if leftPlus: numLeftPlus = 0 maxPos = topPos[0] for read in regionArray: if doWeight: weight = read[2] else: weight = 1.0 currentPos = read[0] - start if currentPos <= maxPos and read[1] == '+': numLeftPlus += weight if returnShift: return (topPos, numHits, smoothArray, numPlus, numLeftPlus, shift) else: return (topPos, numHits, smoothArray, numPlus, numLeftPlus) else: if returnShift: return (topPos, numHits, smoothArray, numPlus, shift) else: return (topPos, numHits, smoothArray, numPlus) def getFeaturesByChromDict(genomeObject, additionalRegionsDict={}, ignorePseudo=False, restrictList=[], regionComplement=False, maxStop=250000000): """ return a dictionary of cistematic gene features. Requires cistematic, obviously. Can filter-out pseudogenes. Will use additional regions dict to supplement gene models, if available. Can restrict output to a list of GIDs. If regionComplement is set to true, returns the regions *outside* of the calculated boundaries, which is useful for retrieving intronic and intergenic regions. maxStop is simply used to define the uppermost boundary of the complement region. """ featuresDict = genomeObject.getallGeneFeatures() restrictGID = False if len(restrictList) > 0: restrictGID = True if len(additionalRegionsDict) > 0: sortList = [] for chrom in additionalRegionsDict: for (label, start, stop, length) in additionalRegionsDict[chrom]: if label not in sortList: sortList.append(label) if label not in featuresDict: featuresDict[label] = [] sense = '+' else: sense = featuresDict[label][0][-1] featuresDict[label].append(('custom', chrom, start, stop, sense)) for gid in sortList: featuresDict[gid].sort(cmp=lambda x,y:cmp(x[2], y[2])) featuresByChromDict = {} for gid in featuresDict: if restrictGID and gid not in restrictList: continue featureList = featuresDict[gid] newFeatureList = [] isPseudo = False for (ftype, chrom, start, stop, sense) in featureList: if ftype == 'PSEUDO': isPseudo = True if (start, stop, ftype) not in newFeatureList: notContained = True containedList = [] for (fstart, fstop, ftype2) in newFeatureList: if start >= fstart and stop <= fstop: notContained = False if start < fstart and stop > fstop: containedList.append((fstart, fstop)) if len(containedList) > 0: newFList = [] notContained = True for (fstart, fstop, ftype2) in newFeatureList: if (fstart, fstop) not in containedList: newFList.append((fstart, fstop, ftype2)) if start >= fstart and stop <= fstop: notContained = False newFeatureList = newFList if notContained: newFeatureList.append((start, stop, ftype)) if ignorePseudo and isPseudo: continue if chrom not in featuresByChromDict: featuresByChromDict[chrom] = [] for (start, stop, ftype) in newFeatureList: featuresByChromDict[chrom].append((start, stop, gid, sense, ftype)) for chrom in featuresByChromDict: featuresByChromDict[chrom].sort() if regionComplement: complementByChromDict = {} complementIndex = 0 for chrom in featuresByChromDict: complementByChromDict[chrom] = [] listLength = len(featuresByChromDict[chrom]) if listLength > 0: currentStart = 0 for index in range(listLength): currentStop = featuresByChromDict[chrom][index][0] complementIndex += 1 if currentStart < currentStop: complementByChromDict[chrom].append((currentStart, currentStop, 'nonExon' + str(complementIndex), 'F', 'nonExon')) currentStart = featuresByChromDict[chrom][index][1] currentStop = maxStop complementByChromDict[chrom].append((currentStart, currentStop, 'nonExon' + str(complementIndex), 'F', 'nonExon')) return (featuresByChromDict, complementByChromDict) else: return featuresByChromDict def getLocusByChromDict(genomeObject, upstream = 0, downstream = 0, useCDS=True, additionalRegionsDict={}, ignorePseudo=False, upstreamSpanTSS=False, lengthCDS=0, keepSense=False, adjustToNeighbor=True): """ return a dictionary of gene loci. Can be used to retrieve additional sequence upstream or downstream of gene, up to the next gene. Requires cistematic, obviously. Can filter-out pseudogenes and use additional regions outside of existing gene models. Use upstreamSpanTSS to overlap half of the upstream region over the TSS. If lengthCDS > 0 bp, e.g. X, return only the starting X bp from CDS. If lengthCDS < 0bp, return only the last X bp from CDS. """ locusByChromDict = {} if upstream == 0 and downstream == 0 and not useCDS: print 'getLocusByChromDict: asked for no sequence - returning empty dict' return locusByChromDict elif upstream > 0 and downstream > 0 and not useCDS: print 'getLocusByChromDict: asked for only upstream and downstream - returning empty dict' return locusByChromDict elif lengthCDS != 0 and not useCDS: print 'getLocusByChromDict: asked for partial CDS but not useCDS - returning empty dict' return locusByChromDict elif upstreamSpanTSS and lengthCDS != 0: print 'getLocusByChromDict: asked for TSS spanning and partial CDS - returning empty dict' return locusByChromDict elif lengthCDS > 0 and downstream > 0: print 'getLocusByChromDict: asked for discontinuous partial CDS from start and downstream - returning empty dict' return locusByChromDict elif lengthCDS < 0 and upstream > 0: print 'getLocusByChromDict: asked for discontinuous partial CDS from stop and upstream - returning empty dict' return locusByChromDict genome = genomeObject.genome featuresDict = genomeObject.getallGeneFeatures() if len(additionalRegionsDict) > 0: sortList = [] for chrom in additionalRegionsDict: for (label, start, stop, length) in additionalRegionsDict[chrom]: if label not in sortList: sortList.append(label) if label not in featuresDict: featuresDict[label] = [] sense = '+' else: sense = featuresDict[label][0][-1] featuresDict[label].append(('custom', chrom, start, stop, sense)) for gid in sortList: featuresDict[gid].sort(cmp=lambda x,y:cmp(x[2], y[2])) for gid in featuresDict: featureList = featuresDict[gid] newFeatureList = [] isPseudo = False for (ftype, chrom, start, stop, sense) in featureList: if ftype == 'PSEUDO': isPseudo = True newFeatureList.append((start, stop)) if ignorePseudo and ftype == 'PSEUDO': continue newFeatureList.sort() sense = featureList[0][-1] gstart = newFeatureList[0][0] gstop = newFeatureList[-1][1] glen = abs(gstart - gstop) if sense == 'F': if not useCDS and upstream > 0: if upstreamSpanTSS: if gstop > (gstart + upstream / 2): gstop = gstart + upstream / 2 # otherwise leave gstop as is else: gstop = gstart elif not useCDS and downstream > 0: gstart = gstop if upstream > 0: if upstreamSpanTSS: distance = upstream / 2 else: distance = upstream if adjustToNeighbor: nextGene = genomeObject.leftGeneDistance((genome, gid), distance * 2) if nextGene < distance * 2: distance = nextGene / 2 if distance < 1: distance = 1 gstart -= distance if downstream > 0: distance = downstream if adjustToNeighbor: nextGene = genomeObject.rightGeneDistance((genome, gid), downstream * 2) if nextGene < downstream * 2: distance = nextGene / 2 if distance < 1: distance = 1 gstop += distance if lengthCDS > 0: if lengthCDS < glen: gstop = newFeatureList[0][0] + lengthCDS if lengthCDS < 0: if abs(lengthCDS) < glen: gstart = newFeatureList[-1][1] + lengthCDS else: if not useCDS and upstream > 0: if upstreamSpanTSS: if gstart < (gstop - upstream / 2): gstart = gstop - upstream / 2 # otherwise leave gstart as is else: gstart = gstop elif not useCDS and downstream > 0: gstop = gstart if upstream > 0: if upstreamSpanTSS: distance = upstream /2 else: distance = upstream if adjustToNeighbor: nextGene = genomeObject.rightGeneDistance((genome, gid), distance * 2) if nextGene < distance * 2: distance = nextGene / 2 if distance < 1: distance = 1 gstop += distance if downstream > 0: distance = downstream if adjustToNeighbor: nextGene = genomeObject.leftGeneDistance((genome, gid), downstream * 2) if nextGene < downstream * 2: distance = nextGene / 2 if distance < 1: distance = 1 gstart -= distance if lengthCDS > 0: if lengthCDS < glen: gstart = newFeatureList[-1][-1] - lengthCDS if lengthCDS < 0: if abs(lengthCDS) < glen: gstop = newFeatureList[0][0] - lengthCDS glen = abs(gstop - gstart) if chrom not in locusByChromDict: locusByChromDict[chrom] = [] if keepSense: locusByChromDict[chrom].append((gstart, gstop, gid, glen, sense)) else: locusByChromDict[chrom].append((gstart, gstop, gid, glen)) for chrom in locusByChromDict: locusByChromDict[chrom].sort() return locusByChromDict def computeRegionBins(regionsByChromDict, hitDict, bins, readlen, regionList = {}, normalizedTag=1., defaultRegionFormat = True, fixedFirstBin=-1, binLength=-1): """ returns 2 dictionaries of bin counts and region lengths, given a dictionary of predefined regions, a dictionary of reads, a number of bins, the length of reads, and optionally a list of regions or a different weight / tag. """ index = 0 regionsBins = {} regionsLen = {} if defaultRegionFormat: regionIDField = 0 startField = 1 stopField = 2 lengthField = 3 else: startField = 0 stopField = 1 regionIDField = 2 lengthField = 3 senseField = 4 print 'entering computeRegionBins' if len(regionList) > 0: for readID in regionList: regionsBins[readID] = [0.] * bins else: for chrom in regionsByChromDict: for regionTuple in regionsByChromDict[chrom]: regionsBins[regionIDField] = [0.] * bins for chrom in hitDict: if chrom not in regionsByChromDict: continue for regionTuple in regionsByChromDict[chrom]: regionsLen[regionTuple[regionIDField]] = regionTuple[lengthField] print '\n' + chrom startRegion = 0 for (tagStart, sense, weight) in hitDict[chrom]: index += 1 if index % 100000 == 0: print 'read %d ' % index, stopPoint = tagStart + readlen if startRegion < 0: startRegion = 0 for regionTuple in regionsByChromDict[chrom][startRegion:]: start = regionTuple[startField] stop = regionTuple[stopField] regionID = regionTuple[regionIDField] rlen = regionTuple[lengthField] try: rsense = regionTuple[senseField] except: rsense = 'F' if tagStart > stop: startRegion += 1 continue if start > stopPoint: startRegion -= 10 break if start <= tagStart <= stop: if binLength < 1: regionBinLength = rlen / bins else: regionBinLength = binLength startdist = tagStart - start if rsense == 'F': # we are relying on python's integer division quirk binID = startdist / regionBinLength if (fixedFirstBin > 0) and (startdist < fixedFirstBin): binID = 0 elif fixedFirstBin > 0: binID = 1 if binID >= bins: binID = bins - 1 try: regionsBins[regionID][binID] += normalizedTag * weight except: print '%s %s' % (regionID, str(binID)) else: rdist = rlen - startdist binID = rdist / regionBinLength if (fixedFirstBin > 0) and (rdist < fixedFirstBin): binID = 0 elif fixedFirstBin > 0: binID = 1 if binID >= bins: binID = bins - 1 try: regionsBins[regionID][binID] += normalizedTag * weight except: print '%s %s' % (regionID, str(binID)) stopPoint = stop return (regionsBins, regionsLen) class readDataset: """ Class for storing reads from experiments. Assumes that custom scripts will translate incoming data into a format that can be inserted into the class using the insert* methods. Default class subtype ('DNA') includes tables for unique and multireads, whereas 'RNA' subtype also includes a splices table. """ def __init__(self, datafile, initialize=False, datasetType='', verbose=False, cache=False, reportCount=True): """ creates an rds datafile if initialize is set to true, otherwise will append to existing tables. datasetType can be either 'DNA' or 'RNA'. """ self.dbcon = '' self.memcon = '' self.dataType = '' self.rdsVersion = '1.1' self.memBacked = False self.memChrom = '' self.memCursor = '' self.cachedDBFile = '' if cache: if verbose: print 'caching ....' self.cacheDB(datafile) dbfile = self.cachedDBFile else: dbfile = datafile self.dbcon = sqlite.connect(dbfile) self.dbcon.row_factory = sqlite.Row self.dbcon.execute('PRAGMA temp_store = MEMORY') if initialize: if datasetType == '': self.dataType = 'DNA' else: self.dataType = datasetType self.initializeTables(self.dbcon) else: metadata = self.getMetadata('dataType') self.dataType = metadata['dataType'] try: metadata = self.getMetadata('rdsVersion') self.rdsVersion = metadata['rdsVersion'] except: try: self.insertMetadata([('rdsVersion', currentRDSversion)]) except: print "could not add rdsVersion - read-only ?" self.rdsVersion = "pre-1.0" if verbose: if initialize: print 'INITIALIZED dataset %s' % datafile else: print 'dataset %s' % datafile metadata = self.getMetadata() print 'metadata:' pnameList = metadata.keys() pnameList.sort() for pname in pnameList: print '\t' + pname + '\t' + metadata[pname] if reportCount: ucount = self.getUniqsCount() mcount = self.getMultiCount() if self.dataType == 'DNA' and not initialize: try: print '\n%d unique reads and %d multireads' % (int(ucount), int(mcount)) except: print '\n%s unique reads and %s multireads' % (ucount, mcount) elif self.dataType == 'RNA' and not initialize: scount = self.getSplicesCount() try: print '\n%d unique reads, %d spliced reads and %d multireads' % (int(ucount), int(scount), int(mcount)) except: print '\n%s unique reads, %s spliced reads and %s multireads' % (ucount, scount, mcount) print "default cache size is %d pages" % self.getDefaultCacheSize() if self.hasIndex(): print "found index" else: print "not indexed" def __len__(self): """ return the number of usable reads in the dataset. """ try: total = self.getUniqsCount() except: total = 0 try: total += self.getMultiCount() except: pass if self.dataType == 'RNA': try: total += self.getSplicesCount() except: pass try: total = int(total) except: total = 0 return total def __del__(self): """ cleanup copy in local cache, if present. """ if self.cachedDBFile != '': self.uncacheDB() def cacheDB(self, filename): """ copy geneinfoDB to a local cache. """ self.cachedDBFile = tempfile.mktemp() + '.db' shutil.copyfile(filename, self.cachedDBFile) def saveCacheDB(self, filename): """ copy geneinfoDB to a local cache. """ shutil.copyfile(self.cachedDBFile, filename) def uncacheDB(self): """ delete geneinfoDB from local cache. """ global cachedDBFile if self.cachedDBFile != '': try: os.remove(self.cachedDBFile) except: print "could not delete %s" % self.cachedDBFile self.cachedDB = '' def attachDB(self, filename, asname): """ attach another database file to the readDataset. """ stmt = "attach '%s' as %s" % (filename, asname) self.execute(stmt) def detachDB(self, asname): """ detach a database file to the readDataset. """ stmt = "detach %s" % (asname) self.execute(stmt) def importFromDB(self, asname, table, ascolumns='*', destcolumns=''): """ import into current RDS the table (with columns destcolumns, with default all columns) from the database file asname, using the column specification of ascolumns (default all). """ stmt = "insert into %s %s select %s from %s.%s" % (table, destcolumns, ascolumns, asname, table) self.execute(stmt, forceCommit=True) def getTables(self, asname=''): """ get a list of table names in a particular database file. """ resultList = [] if self.memBacked: sql = self.memcon.cursor() else: sql = self.dbcon.cursor() if asname != '': asname += '.' stmt = "select name from %ssqlite_master where type='table'" % asname sql.execute(stmt) results = sql.fetchall() for row in results: resultList.append(row["name"]) return resultList def hasIndex(self): """ check whether the RDS file has at least one index. """ stmt = "select count(*) from sqlite_master where type='index'" count = int(self.execute(stmt, returnResults=True)[0][0]) if count > 0: return True return False def initializeTables(self, acon, cache=100000): """ creates table schema in database connection acon, which is typically a database file or an in-memory database. """ acon.execute('PRAGMA DEFAULT_CACHE_SIZE = %d' % cache) acon.execute('create table metadata (name varchar, value varchar)') acon.execute('insert into metadata values("dataType","%s")' % self.dataType) acon.execute('create table uniqs (ID INTEGER PRIMARY KEY, readID varchar, chrom varchar, start int, stop int, sense varchar, weight real, flag varchar, mismatch varchar)') acon.execute('create table multi (ID INTEGER PRIMARY KEY, readID varchar, chrom varchar, start int, stop int, sense varchar, weight real, flag varchar, mismatch varchar)') if self.dataType == 'RNA': acon.execute('create table splices (ID INTEGER PRIMARY KEY, readID varchar, chrom varchar, startL int, stopL int, startR int, stopR int, sense varchar, weight real, flag varchar, mismatch varchar)') acon.commit() def getFileCursor(self): """ returns a cursor to file database for low-level (SQL) access to the data. """ return self.dbcon.cursor() def getMemCursor(self): """ returns a cursor to memory database for low-level (SQL) access to the data. """ return self.memcon.cursor() def getMetadata(self, valueName=''): """ returns a dictionary of metadata. """ whereClause = '' results = [] resultsDict = {} if valueName != '': whereClause = ' where name = "%s" ' % valueName if self.memBacked: sql = self.memcon.cursor() else: sql = self.dbcon.cursor() sql.execute('select name, value from metadata' + whereClause) results = sql.fetchall() for row in results: pname = row["name"] pvalue = row["value"] if pname not in resultsDict: resultsDict[pname] = pvalue else: trying = True index = 2 while trying: newName = pname + ':' + str(index) if newName not in resultsDict: resultsDict[newName] = pvalue trying = False index += 1 return resultsDict def getReadSize(self): """ returns readsize if defined in metadata. """ metadata = self.getMetadata() if 'readsize' not in metadata: print 'no readsize parameter defined - returning 0' return 0 else: return int(metadata["readsize"].split(' ')[0]) def getDefaultCacheSize(self): """ returns the default cache size. """ return int(self.execute("PRAGMA DEFAULT_CACHE_SIZE", returnResults=True)[0][0]) def getChromosomes(self, table = 'uniqs', fullChrom=True): """ returns a list of distinct chromosomes in table. """ statement = 'select distinct chrom from %s' % table if self.memBacked: sql = self.memcon.cursor() else: sql = self.dbcon.cursor() sql.execute(statement) results = [] for row in sql: if len(row["chrom"][3:].strip()) < 1: continue if fullChrom: if row["chrom"] not in results: results.append(row["chrom"]) else: if row["chrom"][3:] not in results: results.append(row["chrom"][3:]) results.sort() return results def getMaxCoordinate(self, chrom, verbose=False, doUniqs = True, doMulti = False, doSplices = False): """ returns the maximum coordinate for reads on a given chromosome. """ maxCoord = 0 if self.memBacked: sql = self.memcon.cursor() else: sql = self.dbcon.cursor() if doUniqs: try: sql.execute('select max(start) from uniqs where chrom = "%s"' % chrom) maxCoord = int(sql.fetchall()[0][0]) except: print "couldn't retrieve coordMax for chromosome %s" % chrom if doSplices: sql.execute('select max(startR) from splices where chrom = "%s"' % chrom) try: spliceMax = int(sql.fetchall()[0][0]) if spliceMax > maxCoord: maxCoord = spliceMax except: pass if doMulti: sql.execute('select max(start) from multi where chrom = "%s"' % chrom) try: multiMax = int(sql.fetchall()[0][0]) if multiMax > maxCoord: maxCoord = multiMax except: pass if verbose: print '%s maxCoord: %d' % (chrom, maxCoord) return maxCoord def getReadsDict(self, verbose=False, bothEnds=False, noSense=False, fullChrom=False, chrom='', flag='',withWeight=False, withFlag=False, withMismatch=False, withID=False, withChrom=False, withPairID=False, doUniqs=True, doMulti=False, findallOptimize=False, readIDDict=False, readLike = '', start=-1, stop=-1, limit=-1, hasMismatch=False, flagLike=False, strand=''): """ returns a dictionary of reads in a variety of formats and which can be restricted by chromosome or custom-flag. Returns unique reads by default, but can return multireads with doMulti set to True. """ whereClause = '' results = [] resultsDict = {} whereClause = '' if (chrom != '' and chrom != self.memChrom): whereClause = ' where ' if chrom != '' and chrom != self.memChrom: whereClause += ' chrom = "%s" ' % chrom if flag != '': if whereClause != '': whereClause += ' and ' else: whereClause = ' where ' if flagLike: whereClause += ' flag LIKE "%' whereClause += '%s' % flag whereClause += '%"' else: whereClause += ' flag = "%s" ' % flag if start > -1: if whereClause != '': whereClause += ' and ' else: whereClause = ' where ' whereClause += ' start > %d ' % start if stop > -1: if whereClause != '': whereClause += ' and ' else: whereClause = ' where ' whereClause += ' stop < %d ' % stop if len(readLike) > 0: if whereClause != '': whereClause += ' and ' else: whereClause = ' where ' whereClause += " readID LIKE '" + readLike + "%' " if hasMismatch: if whereClause != '': whereClause += ' and ' else: whereClause = ' where ' whereClause += " mismatch != '' " if strand == '+' or strand == '-': if whereClause != '': whereClause += ' and ' else: whereClause = ' where ' whereClause += " sense = '%s' " % strand groupBy = '' if findallOptimize: selectClause = 'select start, sense, sum(weight) ' #selectClause = 'select start, sense, weight ' groupBy = ' GROUP BY start, sense ' else: selectClause = 'select ID, chrom, start, readID' if bothEnds: selectClause += ',stop' if not noSense: selectClause += ',sense' if withWeight: selectClause += ',weight' if withFlag: selectClause += ',flag' if withMismatch: selectClause += ',mismatch' if limit > 0: groupBy += ' LIMIT %d ' % limit if doUniqs: stmt = selectClause + ' from uniqs ' + whereClause + groupBy if doMulti: stmt += ' UNION ALL ' + selectClause + ' from multi ' + whereClause + groupBy else: stmt = selectClause + ' from multi ' + whereClause if findallOptimize: if self.memBacked: self.memcon.row_factory = None sql = self.memcon.cursor() else: self.dbcon.row_factory = None sql = self.dbcon.cursor() stmt += ' order by start' elif readIDDict: if self.memBacked: sql = self.memcon.cursor() else: sql = self.dbcon.cursor() stmt += ' order by readID, start ' else: if self.memBacked: sql = self.memcon.cursor() else: sql = self.dbcon.cursor() stmt += ' order by chrom, start' sql.execute(stmt) if findallOptimize: resultsDict[chrom] = [[int(row[0]), row[1], float(row[2])] for row in sql] if self.memBacked: self.memcon.row_factory = sqlite.Row else: self.dbcon.row_factory = sqlite.Row else: currentChrom = '' currentReadID = '' pairID = 0 for row in sql: readID = row["readID"] if fullChrom: chrom = row["chrom"] else: chrom = row["chrom"][3:] if not readIDDict and chrom != currentChrom: resultsDict[chrom] = [] currentChrom = chrom dictKey = chrom elif readIDDict: theReadID = readID if '::' in readID: (theReadID, multiplicity) = readID.split('::') if '/' in theReadID and withPairID: (theReadID, pairID) = readID.split('/') if theReadID != currentReadID: resultsDict[theReadID] = [] currentReadID = theReadID dictKey = theReadID newrow = [int(row["start"])] if bothEnds: newrow.append(int(row["stop"])) if not noSense: newrow.append(row["sense"]) if withWeight: newrow.append(float(row["weight"])) if withFlag: newrow.append(row["flag"]) if withMismatch: newrow.append(row["mismatch"]) if withID: newrow.append(readID) if withChrom: newrow.append(chrom) if withPairID: newrow.append(pairID) resultsDict[dictKey].append(newrow) return resultsDict def getSplicesDict(self, verbose=False, noSense=False, fullChrom=False, chrom='', flag='', withWeight=False, withFlag=False, withMismatch=False, withID=False, withChrom=False, withPairID=False, readIDDict=False, splitRead=False, hasMismatch=False, flagLike=False, start=-1, stop=-1, strand=''): """ returns a dictionary of spliced reads in a variety of formats and which can be restricted by chromosome or custom-flag. Returns unique spliced reads for now. """ whereClause = '' results = [] resultsDict = {} conditions = False if (chrom != '' and chrom != self.memChrom) or flag != '' or hasMismatch: whereClause = ' where ' if chrom != '' and chrom != self.memChrom: whereClause += ' chrom = "%s" ' % chrom conditions = True if flag != '': if conditions: whereClause += ' and ' if flagLike: whereClause += ' flag LIKE "%' whereClause += '%s' % flag whereClause += '%"' else: whereClause += ' flag = "%s" ' % flag conditions = True if hasMismatch: if conditions: whereClause += ' and ' whereClause += " mismatch != '' " if strand != '': if whereClause != '': whereClause += ' and ' else: whereClause = ' where ' whereClause += " sense = '%s' " % strand if start > -1: if whereClause != '': whereClause += ' and ' else: whereClause = ' where ' whereClause += ' startL > %d ' % start if stop > -1: if whereClause != '': whereClause += ' and ' else: whereClause = ' where ' whereClause += ' stopR < %d ' % stop selectClause = 'select ID, chrom, startL, stopL, startR, stopR, readID' if not noSense: selectClause += ', sense' if withWeight: selectClause += ', weight' if withFlag: selectClause += ', flag' if withMismatch: selectClause += ', mismatch' if self.memBacked: sql = self.memcon.cursor() else: sql = self.dbcon.cursor() if chrom == '' and not readIDDict: stmt = 'select distinct chrom from splices ' + whereClause sql.execute(stmt) for row in sql: if fullChrom: chrom = row["chrom"] else: chrom = row["chrom"][3:] resultsDict[chrom] = [] elif chrom != '' and not readIDDict: resultsDict[chrom] = [] stmt = selectClause + ' from splices ' + whereClause + ' order by chrom, startL' sql.execute(stmt) currentReadID = '' for row in sql: pairID = 0 readID = row["readID"] if fullChrom: chrom = row["chrom"] else: chrom = row["chrom"][3:] if readIDDict: if '/' in readID: (theReadID, pairID) = readID.split('/') else: theReadID = readID if theReadID != currentReadID: resultsDict[theReadID] = [] currentReadID = theReadID dictKey = theReadID else: dictKey = chrom newrow = [int(row["startL"])] newrow.append(int(row["stopL"])) newrow.append(int(row["startR"])) newrow.append(int(row["stopR"])) if not noSense: newrow.append(row["sense"]) if withWeight: newrow.append(float(row["weight"])) if withFlag: newrow.append(row["flag"]) if withMismatch: newrow.append(row["mismatch"]) if withID: newrow.append(readID) if withChrom: newrow.append(chrom) if withPairID: newrow.append(pairID) if splitRead: resultsDict[dictKey].append(newrow[:2] + newrow[4:]) resultsDict[dictKey].append(newrow[2:]) else: resultsDict[dictKey].append(newrow) return resultsDict def getCounts(self, chrom='', rmin='', rmax='', uniqs=True, multi=False, splices=False, reportCombined=True, sense='both'): """ return read counts for a given region. """ ucount = 0 mcount = 0 scount = 0 restrict = '' if sense in ['+','-']: restrict = " sense ='%s' " % sense if uniqs: try: ucount = float(self.getUniqsCount(chrom, rmin, rmax, restrict)) except: ucount = 0 if multi: try: mcount = float(self.getMultiCount(chrom, rmin, rmax, restrict)) except: mcount = 0 if splices: try: scount = float(self.getSplicesCount(chrom, rmin, rmax, restrict)) except: scount = 0 if reportCombined: total = ucount + mcount + scount return total else: return (ucount, mcount, scount) def getUniqsCount(self, chrom='', rmin='', rmax='',restrict='', distinct=False): """ returns the number of row in the uniqs table. """ whereclause = '' count = 0 if restrict != '' or (chrom != '' and chrom != self.memChrom) or rmin != '' or rmax != '': whereclause = ' where ' if chrom !='' and chrom != self.memChrom: whereclause += 'chrom="' + chrom + '" ' if rmin != '': if len(whereclause) > 8: whereclause += ' and ' whereclause += 'start >= %s' % str(rmin) if rmax != '': if len(whereclause) > 8: whereclause += ' and ' whereclause += 'start <= %s' % str(rmax) if restrict != '': if len(whereclause) > 8: whereclause += ' and ' whereclause += restrict if self.memBacked: sql = self.memcon.cursor() else: sql = self.dbcon.cursor() if distinct: sql.execute('select count(distinct chrom+start+sense) from uniqs' + whereclause) else: sql.execute('select sum(weight) from uniqs' + whereclause) result = sql.fetchone() try: count = int(result[0]) except: count = 0 return count def getSplicesCount(self, chrom='', rmin='', rmax='', restrict=''): """ returns the number of row in the splices table. """ whereclause = '' count = 0 if restrict != '' or (chrom != '' and chrom != self.memChrom) or rmin != '' or rmax != '': whereclause = ' where ' if chrom !='' and chrom != self.memChrom: whereclause += 'chrom="' + chrom + '" ' if rmin != '': if len(whereclause) > 8: whereclause += ' and ' whereclause += 'startL >= %s' % str(rmin) if rmax != '': if len(whereclause) > 8: whereclause += ' and ' whereclause += 'startL <= %s' % str(rmax) if restrict != '': if len(whereclause) > 8: whereclause += ' and ' whereclause += restrict if self.memBacked: sql = self.memcon.cursor() else: sql = self.dbcon.cursor() if self.memBacked: sql = self.memcon.cursor() else: sql = self.dbcon.cursor() sql.execute('select sum(weight) from splices' + whereclause) result = sql.fetchone() try: count = int(result[0]) except: count = 0 return count def getMultiCount(self, chrom='', rmin='', rmax='', restrict=''): """ returns the number of distinct readIDs in the multi table. """ whereclause = '' count = 0 if restrict != '' or (chrom != '' and chrom != self.memChrom) or rmin != '' or rmax != '': whereclause = ' where ' if chrom !='' and chrom != self.memChrom: whereclause += 'chrom="' + chrom + '" ' if rmin != '': if len(whereclause) > 8: whereclause += ' and ' whereclause += 'start >= %s' % str(rmin) if rmax != '': if len(whereclause) > 8: whereclause += ' and ' whereclause += 'start <= %s' % str(rmax) if restrict != '': if len(whereclause) > 8: whereclause += ' and ' whereclause += restrict if self.memBacked: sql = self.memcon.cursor() else: sql = self.dbcon.cursor() sql.execute('select sum(weight) from multi' + whereclause) result = sql.fetchone() try: count = int(result[0]) except: count = 0 return count def getReadIDs(self, uniqs=True, multi=False, splices=False, paired=False, limit=-1): """ get readID's. """ stmt = '' limitPart = '' if limit > 0: limitPart = ' LIMIT %d ' % limit if uniqs: stmt += 'select readID from uniqs ' if multi: if len(stmt) > 0: stmt += ' union ' stmt += 'select readID from multi ' if splices: if len(stmt) > 0: stmt += ' union ' stmt += 'select readID from splices ' stmt += ' group by readID ' + limitPart if self.memBacked: sql = self.memcon.cursor() else: sql = self.dbcon.cursor() sql.execute(stmt) result = sql.fetchall() if paired: return [x.split('/')[0][0] for x in result] else: return [x[0] for x in result] def getMismatches(self, mischrom = None, verbose=False, useSplices=True): """ returns the uniq and spliced mismatches in a dictionary. """ revcomp = {"A":"T", "T":"A", "G":"C", "C":"G", "N":"N"} readlen = self.getReadSize() if mischrom: hitChromList = [mischrom] else: hitChromList = self.getChromosomes() hitChromList.sort() snpDict = {} for achrom in hitChromList: if verbose: print 'getting mismatches from chromosome %s' % (achrom) snpDict[achrom] = [] hitDict = self.getReadsDict(fullChrom=True, chrom=achrom, withMismatch=True, findallOptimize=False, hasMismatch=True) if useSplices and self.dataType == 'RNA': spliceDict = self.getSplicesDict(fullChrom=True, chrom=achrom, withMismatch=True, readIDDict=True, hasMismatch=True) spliceIDList = spliceDict.keys() for k in spliceIDList: (startpos, lefthalf, rightstart, endspos, sense, mismatches) = spliceDict[k][0] spMismatchList = mismatches.split(',') for mismatch in spMismatchList: if 'N' in mismatch: continue change_len = len(mismatch) if sense == '+': change_from = mismatch[0] change_base = mismatch[change_len-1] change_pos = int(mismatch[1:change_len-1]) elif sense == '-': change_from = revcomp[mismatch[0]] change_base = revcomp[mismatch[change_len-1]] change_pos = readlen - int(mismatch[1:change_len-1]) + 1 firsthalf = int(lefthalf)-int(startpos)+1 secondhalf = 0 if int(change_pos) <= int(firsthalf): change_at = startpos + change_pos - 1 else: secondhalf = change_pos - firsthalf change_at = rightstart + secondhalf #print "sense %s startpos %s changepos %s changeat %s firsthalf %s secondhalf %s rightstart %s lefthalf %s from %s to %s" % (sense, startpos, change_pos, change_at, firsthalf, secondhalf, rightstart, lefthalf, change_from, change_base) snpDict[achrom].append([startpos, change_at, change_base, change_from]) if achrom not in hitDict: continue for (start, sense, mismatches) in hitDict[achrom]: mismatchList = mismatches.split(',') for mismatch in mismatchList: if 'N' in mismatch: continue change_len = len(mismatch) if sense == '+': change_from = mismatch[0] change_base = mismatch[change_len-1] change_pos = int(mismatch[1:change_len-1]) elif sense == '-': change_from = revcomp[mismatch[0]] change_base = revcomp[mismatch[change_len-1]] change_pos = readlen - int(mismatch[1:change_len-1]) + 1 change_at = start + change_pos - 1 snpDict[achrom].append([start, change_at, change_base, change_from]) return snpDict def getChromProfile(self, chromosome, cstart=-1, cstop=-1, useMulti=True, useSplices=False, normalizationFactor = 1.0, trackStrand=False, keepStrand='both'): """return a profile of the chromosome as an array of per-base read coverage.... keepStrand = 'both', 'plusOnly', or 'minusOnly' """ metadata = self.getMetadata() readlen = int(metadata['readsize'].split(' ')[0]) dataType = metadata['dataType'] readlenRange = range(readlen) scale = 1. / normalizationFactor if cstop > 0: lastNT = self.getMaxCoordinate(chromosome, doMulti=useMulti, doSplices=useSplices) + readlen else: lastNT = cstop - cstart + readlen chromModel = array('f',[0.] * lastNT) hitDict = self.getReadsDict(fullChrom=True, chrom=chromosome, withWeight=True, doMulti=useMulti, start=cstart, stop=cstop, findallOptimize=True) if cstart < 0: cstart = 0 for (hstart, sense, weight) in hitDict[chromosome]: for index in readlenRange: currentpos = hstart - cstart + index if not trackStrand or (sense == '+' and keepStrand != 'minusOnly'): chromModel[currentpos] += scale * weight elif sense == '-' and keepStrand != 'plusOnly': chromModel[currentpos] -= scale * weight del hitDict if useSplices and dataType == 'RNA': if cstop > 0: spliceDict = self.getSplicesDict(fullChrom=True, chrom=chromosome, withID=True, start=cstart, stop=cstop) else: spliceDict = self.getSplicesDict(fullChrom=True, chrom=chromosome, withID=True) if chromosome in spliceDict: for (Lstart, Lstop, Rstart, Rstop, rsense, readName) in spliceDict[chromosome]: if (Rstop - cstart) < lastNT: for index in range(abs(Lstop - Lstart)): currentpos = Lstart - cstart + index # we only track unique splices if not trackStrand or (sense == '+' and keepStrand != 'minusOnly'): chromModel[currentpos] += scale elif sense == '-' and keepStrand != 'plusOnly': chromModel[currentpos] -= scale for index in range(abs(Rstop - Rstart)): currentpos = Rstart - cstart + index # we only track unique splices if not trackStrand or (sense == '+' and keepStrand != 'minusOnly'): chromModel[currentpos] += scale elif sense == '-' and keepStrand != 'plusOnly': chromModel[currentpos] -= scale del spliceDict return chromModel def insertMetadata(self, valuesList): """ inserts a list of (pname, pvalue) into the metadata table. """ self.dbcon.executemany("insert into metadata(name, value) values (?,?)", valuesList) self.dbcon.commit() def updateMetadata(self, pname, newValue, originalValue=''): """ update a metadata field given the original value and the new value. """ stmt = "update metadata set value='%s' where name='%s'" % (str(newValue), pname) if originalValue != '': stmt += " and value='%s' " % str(originalValue) self.dbcon.execute(stmt) self.dbcon.commit() def insertUniqs(self, valuesList): """ inserts a list of (readID, chrom, start, stop, sense, weight, flag, mismatch) into the uniqs table. """ self.dbcon.executemany("insert into uniqs(ID, readID, chrom, start, stop, sense, weight, flag, mismatch) values (NULL,?,?,?,?,?,?,?,?)", valuesList) self.dbcon.commit() def insertMulti(self, valuesList): """ inserts a list of (readID, chrom, start, stop, sense, weight, flag, mismatch) into the multi table. """ self.dbcon.executemany("insert into multi(ID, readID, chrom, start, stop, sense, weight, flag, mismatch) values (NULL,?,?,?,?,?,?,?,?)", valuesList) self.dbcon.commit() def insertSplices(self, valuesList): """ inserts a list of (readID, chrom, startL, stopL, startR, stopR, sense, weight, flag, mismatch) into the splices table. """ self.dbcon.executemany("insert into splices(ID, readID, chrom, startL, stopL, startR, stopR, sense, weight, flag, mismatch) values (NULL,?,?,?,?,?,?,?,?,?,?)", valuesList) self.dbcon.commit() def flagReads(self, regionsList, uniqs=True, multi=False, splices=False, sense='both'): """ update reads on file database in a list region of regions for a chromosome to have a new flag. regionsList must have 4 fields per region of the form (flag, chrom, start, stop) or, with sense set to '+' or '-', 5 fields per region of the form (flag, chrom, start, stop, sense). """ restrict = "" if sense != 'both': restrict = " and sense = ? " if uniqs: self.dbcon.executemany("UPDATE uniqs SET flag = ? where chrom = ? and start >= ? and start < ? " + restrict, regionsList) if multi: self.dbcon.executemany("UPDATE multi SET flag = ? where chrom = ? and start >= ? and start < ? " + restrict, regionsList) if self.dataType == 'RNA' and splices: self.dbcon.executemany("UPDATE splices SET flag = flag || ' L:' || ? where chrom = ? and startL >= ? and startL < ? " + restrict, regionsList) self.dbcon.executemany("UPDATE splices SET flag = flag || ' R:' || ? where chrom = ? and startR >= ? and startR < ? " + restrict, regionsList) self.dbcon.commit() def setFlags(self, flag, uniqs=True, multi=True, splices=True): """ set the flag fields in the entire dataset to clear. Useful for rerunning an analysis from scratch. """ if uniqs: self.dbcon.execute("UPDATE uniqs SET flag = '%s'" % flag) if multi: self.dbcon.execute("UPDATE multi SET flag = '%s'" % flag) if self.dataType == 'RNA' and splices: self.dbcon.execute("UPDATE splices SET flag = '%s'" % flag) self.dbcon.commit() def resetFlags(self, uniqs=True, multi=True, splices=True): """ reset the flag fields in the entire dataset to clear. Useful for rerunning an analysis from scratch. """ if uniqs: self.dbcon.execute("UPDATE uniqs SET flag = ''") if multi: self.dbcon.execute("UPDATE multi SET flag = ''") if self.dataType == 'RNA' and splices: self.dbcon.execute("UPDATE splices SET flag = ''") self.dbcon.commit() def reweighMultireads(self, readList): self.dbcon.executemany("UPDATE multi SET weight = ? where chrom = ? and start = ? and readID = ? ", readList) def setSynchronousPragma(self, value='ON'): try: self.dbcon.execute("PRAGMA SYNCHRONOUS = %s" % value) except: print "warning: couldn't set PRAGMA SYNCHRONOUS = %s" % value def setDBcache(self, cache, default=False): self.dbcon.execute("PRAGMA CACHE_SIZE = %d" % cache) if default: self.dbcon.execute('PRAGMA DEFAULT_CACHE_SIZE = %d' % cache) def execute(self, statement, returnResults=False, forceCommit=False): if self.memBacked: sql = self.memcon.cursor() else: sql = self.dbcon.cursor() sql.execute(statement) if returnResults: result = sql.fetchall() return result if forceCommit: if self.memBacked: self.memcon.commit() else: self.dbcon.commit() def buildIndex(self, cache=100000): """ Builds the file indeces for the main tables. Cache is the number of 1.5 kb pages to keep in memory. 100000 pages translates into 150MB of RAM, which is our default. """ if cache > self.getDefaultCacheSize(): self.setDBcache(cache) self.setSynchronousPragma('OFF') self.dbcon.execute("CREATE INDEX uPosIndex on uniqs(chrom, start)") print 'built uPosIndex' self.dbcon.execute("CREATE INDEX uChromIndex on uniqs(chrom)") print 'built uChromIndex' self.dbcon.execute("CREATE INDEX mPosIndex on multi(chrom, start)") print 'built mPosIndex' self.dbcon.execute("CREATE INDEX mChromIndex on multi(chrom)") print 'built mChromIndex' if self.dataType == 'RNA': self.dbcon.execute("CREATE INDEX sPosIndex on splices(chrom, startL)") print 'built sPosIndex' self.dbcon.execute("CREATE INDEX sPosIndex2 on splices(chrom, startR)") print 'built sPosIndex2' self.dbcon.execute("CREATE INDEX sChromIndex on splices(chrom)") print 'built sChromIndex' self.dbcon.commit() self.setSynchronousPragma('ON') def dropIndex(self): """ drops the file indices for the main tables. """ try: self.setSynchronousPragma('OFF') self.dbcon.execute("DROP INDEX uPosIndex") self.dbcon.execute("DROP INDEX uChromIndex") self.dbcon.execute("DROP INDEX mPosIndex") self.dbcon.execute("DROP INDEX mChromIndex") if self.dataType == 'RNA': self.dbcon.execute("DROP INDEX sPosIndex") try: self.dbcon.execute("DROP INDEX sPosIndex2") except: pass self.dbcon.execute("DROP INDEX sChromIndex") self.dbcon.commit() except: print "problem dropping index" self.setSynchronousPragma('ON') def memSync(self, chrom='', index=False): """ makes a copy of the dataset into memory for faster access. Can be restricted to a "full" chromosome. Can also build the memory indices. """ self.memcon = '' self.memcon = sqlite.connect(":memory:") self.initializeTables(self.memcon) cursor = self.dbcon.cursor() whereclause = '' if chrom != '': print 'memSync %s' % chrom whereclause = ' where chrom = "%s" ' % chrom self.memChrom = chrom else: self.memChrom = '' self.memcon.execute('PRAGMA temp_store = MEMORY') self.memcon.execute("PRAGMA CACHE_SIZE = 1000000") # copy metadata to memory self.memcon.execute('delete from metadata') results = cursor.execute('select name, value from metadata') results2 = [] for row in results: results2.append((row["name"], row["value"])) self.memcon.executemany("insert into metadata(name, value) values (?,?)", results2) # copy uniqs to memory results = cursor.execute('select chrom, start, stop, sense, weight, flag, mismatch, readID from uniqs' + whereclause) results2 = [] for row in results: results2.append((row["readID"], row["chrom"], int(row["start"]), int(row["stop"]), row["sense"], row["weight"], row["flag"], row["mismatch"])) self.memcon.executemany("insert into uniqs(ID, readID, chrom, start, stop, sense, weight, flag, mismatch) values (NULL,?,?,?,?,?,?,?,?)", results2) # copy multi to memory results = cursor.execute('select chrom, start, stop, sense, weight, flag, mismatch, readID from multi' + whereclause) results2 = [] for row in results: results2.append((row["readID"], row["chrom"], int(row["start"]), int(row["stop"]), row["sense"], row["weight"], row["flag"], row["mismatch"])) self.memcon.executemany("insert into multi(ID, readID, chrom, start, stop, sense, weight, flag, mismatch) values (NULL,?,?,?,?,?,?,?,?)", results2) # copy splices to memory if self.dataType == 'RNA': results = cursor.execute('select chrom, startL, stopL, startR, stopR, sense, weight, flag, mismatch, readID from splices' + whereclause) results2 = [] for row in results: results2.append((row["readID"], row["chrom"], int(row["startL"]), int(row["stopL"]), int(row["startR"]), int(row["stopR"]), row["sense"], row["weight"], row["flag"], row["mismatch"])) self.memcon.executemany("insert into splices(ID, readID, chrom, startL, stopL, startR, stopR, weight, sense, flag, mismatch) values (NULL,?,?,?,?,?,?,?,?,?,?)", results2) if index: if chrom != '': self.memcon.execute("CREATE INDEX uPosIndex on uniqs(start)") self.memcon.execute("CREATE INDEX mPosIndex on multi(start)") if self.dataType == 'RNA': self.memcon.execute("CREATE INDEX sPosLIndex on splices(startL)") self.memcon.execute("CREATE INDEX sPosRIndex on splices(startR)") else: self.memcon.execute("CREATE INDEX uPosIndex on uniqs(chrom, start)") self.memcon.execute("CREATE INDEX mPosIndex on multi(chrom, start)") if self.dataType == 'RNA': self.memcon.execute("CREATE INDEX sPosLIndex on splices(chrom, startL)") self.memcon.execute("CREATE INDEX sPosRIndex on splices(chrom, startR)") self.memBacked = True self.memcon.row_factory = sqlite.Row self.memcon.commit()