1 | #!/usr/bin/env python |
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2 | |
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3 | import sys |
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4 | import optparse |
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5 | |
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6 | def stop_err( msg ): |
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7 | sys.stderr.write( msg ) |
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8 | sys.exit() |
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9 | |
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10 | def main(): |
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11 | usage = """%prog [options] |
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12 | |
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13 | options (listed below) default to 'None' if omitted |
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14 | """ |
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15 | parser = optparse.OptionParser(usage=usage) |
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16 | |
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17 | parser.add_option( |
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18 | '--0x0001','--is_paired', |
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19 | choices = ( '0','1' ), |
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20 | dest='is_paired', |
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21 | metavar="<0|1>", |
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22 | help='The read is paired in sequencing') |
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23 | |
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24 | parser.add_option( |
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25 | '--0x0002','--is_proper_pair', |
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26 | choices = ( '0','1' ), |
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27 | metavar="<0|1>", |
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28 | dest='is_proper_pair', |
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29 | help='The read is mapped in a proper pair') |
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30 | |
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31 | parser.add_option( |
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32 | '--0x0004','--is_unmapped', |
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33 | choices = ( '0','1' ), |
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34 | metavar="<0|1>", |
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35 | dest='is_unmapped', |
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36 | help='The query sequence itself is unmapped') |
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37 | |
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38 | parser.add_option( |
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39 | '--0x0008','--mate_is_unmapped', |
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40 | choices = ( '0','1' ), |
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41 | metavar="<0|1>", |
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42 | dest='mate_is_unmapped', |
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43 | help='The mate is unmapped') |
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44 | |
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45 | parser.add_option( |
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46 | '--0x0010','--query_strand', |
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47 | dest='query_strand', |
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48 | metavar="<0|1>", |
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49 | choices = ( '0','1' ), |
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50 | help='Strand of the query: 0 = forward, 1 = reverse.') |
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51 | |
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52 | parser.add_option( |
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53 | '--0x0020','--mate_strand', |
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54 | dest='mate_strand', |
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55 | metavar="<0|1>", |
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56 | choices = ('0','1'), |
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57 | help='Strand of the mate: 0 = forward, 1 = reverse.') |
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58 | |
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59 | parser.add_option( |
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60 | '--0x0040','--is_first', |
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61 | choices = ( '0','1' ), |
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62 | metavar="<0|1>", |
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63 | dest='is_first', |
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64 | help='The read is the first read in a pair') |
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65 | |
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66 | parser.add_option( |
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67 | '--0x0080','--is_second', |
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68 | choices = ( '0','1' ), |
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69 | metavar="<0|1>", |
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70 | dest='is_second', |
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71 | help='The read is the second read in a pair') |
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72 | |
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73 | parser.add_option( |
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74 | '--0x0100','--is_not_primary', |
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75 | choices = ( '0','1' ), |
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76 | metavar="<0|1>", |
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77 | dest='is_not_primary', |
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78 | help='The alignment for the given read is not primary') |
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79 | |
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80 | parser.add_option( |
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81 | '--0x0200','--is_bad_quality', |
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82 | choices = ( '0','1' ), |
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83 | metavar="<0|1>", |
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84 | dest='is_bad_quality', |
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85 | help='The read fails platform/vendor quality checks') |
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86 | |
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87 | parser.add_option( |
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88 | '--0x0400','--is_duplicate', |
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89 | choices = ( '0','1' ), |
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90 | metavar="<0|1>", |
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91 | dest='is_duplicate', |
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92 | help='The read is either a PCR or an optical duplicate') |
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93 | |
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94 | parser.add_option( |
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95 | '-f','--input_sam_file', |
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96 | metavar="INPUT_SAM_FILE", |
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97 | dest='input_sam', |
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98 | default = False, |
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99 | help='Name of the SAM file to be filtered. STDIN is default') |
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100 | |
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101 | parser.add_option( |
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102 | '-c','--flag_column', |
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103 | dest='flag_col', |
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104 | default = '2', |
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105 | help='Column containing SAM bitwise flag. 1-based') |
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106 | |
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107 | parser.add_option( |
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108 | '-d','--debug', |
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109 | dest='debug', |
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110 | action='store_true', |
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111 | default = False, |
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112 | help='Print debugging info') |
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113 | |
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114 | options, args = parser.parse_args() |
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115 | |
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116 | if options.input_sam: |
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117 | infile = open ( options.input_sam, 'r') |
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118 | else: |
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119 | infile = sys.stdin |
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120 | |
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121 | option_values = { '0': False, '1': True, None: None } |
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122 | |
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123 | states = []; |
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124 | states.append( option_values[ options.is_paired ] ) |
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125 | states.append( option_values[ options.is_proper_pair ] ) |
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126 | states.append( option_values[ options.is_unmapped ] ) |
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127 | states.append( option_values[ options.mate_is_unmapped ] ) |
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128 | states.append( option_values[ options.query_strand ] ) |
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129 | states.append( option_values[ options.mate_strand ] ) |
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130 | states.append( option_values[ options.is_first ] ) |
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131 | states.append( option_values[ options.is_second ] ) |
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132 | states.append( option_values[ options.is_not_primary ] ) |
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133 | states.append( option_values[ options.is_bad_quality ] ) |
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134 | states.append( option_values[ options.is_duplicate ] ) |
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135 | |
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136 | for line in infile: |
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137 | line = line.rstrip( '\r\n' ) |
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138 | if line and not line.startswith( '#' ) and not line.startswith( '@' ) : |
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139 | fields = line.split( '\t' ) |
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140 | sam_states = [] |
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141 | sam_states.append( bool( int( fields[ int( options.flag_col ) - 1 ] ) & 0x0001 ) ) |
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142 | sam_states.append( bool( int( fields[ int( options.flag_col ) - 1 ] ) & 0x0002 ) ) |
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143 | sam_states.append( bool( int( fields[ int( options.flag_col ) - 1 ] ) & 0x0004 ) ) |
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144 | sam_states.append( bool( int( fields[ int( options.flag_col ) - 1 ] ) & 0x0008 ) ) |
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145 | sam_states.append( bool( int( fields[ int( options.flag_col ) - 1 ] ) & 0x0010 ) ) |
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146 | sam_states.append( bool( int( fields[ int( options.flag_col ) - 1 ] ) & 0x0020 ) ) |
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147 | sam_states.append( bool( int( fields[ int( options.flag_col ) - 1 ] ) & 0x0040 ) ) |
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148 | sam_states.append( bool( int( fields[ int( options.flag_col ) - 1 ] ) & 0x0080 ) ) |
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149 | sam_states.append( bool( int( fields[ int( options.flag_col ) - 1 ] ) & 0x0100 ) ) |
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150 | sam_states.append( bool( int( fields[ int( options.flag_col ) - 1 ] ) & 0x0200 ) ) |
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151 | sam_states.append( bool( int( fields[ int( options.flag_col ) - 1 ] ) & 0x0400 ) ) |
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152 | |
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153 | joined_states = zip(states,sam_states) |
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154 | searchable_fields = [] |
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155 | |
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156 | for i in range( len( joined_states ) ): |
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157 | if joined_states[i][0] != None: |
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158 | searchable_fields.append( joined_states[ i ] ) |
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159 | |
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160 | valid_line = True |
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161 | |
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162 | for i in range( len( searchable_fields ) ): |
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163 | if searchable_fields[i][0] != searchable_fields[i][1]: |
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164 | valid_line = False |
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165 | |
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166 | if valid_line: |
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167 | print line |
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168 | if options.debug: |
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169 | for i in range( len( joined_states ) ): |
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170 | print i, joined_states[i][0], joined_states[i][1] |
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171 | |
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172 | # if skipped_lines > 0: |
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173 | # print 'Skipped %d invalid lines' % skipped_lines |
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174 | |
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175 | |
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176 | if __name__ == "__main__": main() |
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177 | |
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