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1 try :
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2 import pysam
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3 except ImportError :
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4 print "[Error] It seems that you haven't install \"pysam\" package.. Please do it before you run this script."
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5 exit(-1)
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6
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7 import sys
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8 from bs_align_utils import *
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9
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10 BAM = 'bam'
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11 SAM = 'sam'
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12 BS_SEEKER1 = 'bs_seeker1'
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13
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14 formats = [BAM, SAM, BS_SEEKER1]
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15
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16 class outfile:
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17 def __init__(self, filename, format, chrom_len, cmd_line, suppress_SAM_header):
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18 self.filename = filename
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19 self.format = format
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20 self.chrom_ids = dict((k, i) for i, k in enumerate(sorted(chrom_len)))
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21
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22 if format == BS_SEEKER1:
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23 self.f = open(filename, 'w')
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24 elif format in [SAM, BAM]:
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25 header = { 'HD' : { 'VN': '1.0'},
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26 'SQ' : [ {'LN' : chrom_len[c], 'SN' : c} for c in sorted(chrom_len) ],
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27 'PG' : [ { 'ID' : 1, 'PN' : 'BS Seeker 2', 'CL' : cmd_line} ]
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28 }
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29 self.f = pysam.Samfile(filename, 'w' + ('b' if format == BAM else ('' if suppress_SAM_header else 'h')), header = header)
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30
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31
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32
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33 def close(self):
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34 self.f.close()
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35
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36 def store(self, qname, N_mismatch, FR, refname, strand, pos, cigar, original_BS, methy, STEVE, rnext = -1, pnext = -1, qual = None, output_genome = None,
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37 rrbs = False, my_region_serial = -1, my_region_start = 0, my_region_end = 0):
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38
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39 if self.format == BS_SEEKER1:
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40
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41 # remove the soft clipped bases from the read
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42 # this is done for backwards compatibility with the old format
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43 r_start, r_end, _ = get_read_start_end_and_genome_length(cigar)
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44 original_BS = original_BS[r_start : r_end]
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45
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46 if rrbs:
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47 self.f.write('%s\t%2d\t%s\t%s%s%s\t%s\t%s\t%s\t%d\n' % (qname, N_mismatch, FR, refname, strand, str(pos+1).zfill(10), output_genome, original_BS, methy, STEVE))
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48 else:
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49 self.f.write('%s\t%2d\t%s\t%s%s%s\t%s\t%s\t%s\t%d\t%d\t%d\t%d\n' % (qname, N_mismatch, FR, refname, strand, str(pos+1).zfill(10), output_genome, original_BS, methy, my_region_serial, my_region_start, my_region_end, STEVE))
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50
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51
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52 elif self.format == BAM or self.format == SAM:
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53
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54 a = pysam.AlignedRead()
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55 a.qname = qname
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56 a.seq = original_BS if strand == '+' else reverse_compl_seq(original_BS)
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57 a.flag = 0x10 if strand == '-' else 0
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58 a.tid = self.chrom_ids[refname]
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59 a.pos = pos
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60 a.mapq = 255
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61 a.cigar = cigar if strand == '+' else list(reversed(cigar))
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62 a.rnext = rnext if rnext == -1 else self.chrom_ids[rnext]
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63 a.pnext = pnext
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64 a.qual= qual
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65 if rrbs:
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66 a.tags = (('XO', FR),
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67 ('XS', STEVE),
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68 ('NM', N_mismatch),
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69 ('XM', methy),
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70 ('XG', output_genome),
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71 ('YR', my_region_serial),
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72 ('YS', my_region_start),
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73 ('YE', my_region_end)
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74 )
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75
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76 else:
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77 a.tags = (('XO', FR),
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78 ('XS', STEVE),
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79 ('NM', N_mismatch),
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80 ('XM', methy),
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81 ('XG', output_genome))
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82
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83 self.f.write(a)
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