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1 import sys, re
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2
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3 def stop_err( msg ):
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4 sys.stderr.write( msg )
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5 sys.exit()
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6
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7 def __main__():
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8 try:
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9 infile = open ( sys.argv[1], 'r')
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10 outfile = open ( sys.argv[2], 'w')
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11 except:
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12 stop_err( 'Cannot open or create a file\n' )
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13
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14 if len( sys.argv ) < 5:
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15 stop_err( 'No columns to merge' )
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16 else:
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17 delimiter = sys.argv[3]
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18 cols = sys.argv[4:]
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19
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20 skipped_lines = 0
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21
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22 char_dict = {
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23 'T': '\t',
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24 's': '\s',
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25 'Dt': '\.',
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26 'Sl': '\\',
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27 'Sr': '/',
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28 'C': ',',
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29 'D': '-',
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30 'U': '_',
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31 'P': '\|',
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32 'Co': ':',
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33 'Sc': ';',
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34 'Ep': ''
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35 }
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36 for line in infile:
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37 line = line.rstrip( '\r\n' )
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38 if line and not line.startswith( '#' ):
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39 fields = line.split( '\t' )
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40 line += '\t'
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41 for i, col in enumerate(cols):
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42 try:
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43 if i!=len(cols)-1:
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44 line += fields[ int( col ) -1 ] + char_dict[delimiter]
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45 else:
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46 line += fields[ int( col ) -1 ]
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47
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48 except:
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49 skipped_lines += 1
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50
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51 print >>outfile, line
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52
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53 if skipped_lines > 0:
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54 print 'Skipped %d invalid lines' % skipped_lines
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55
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56 if __name__ == "__main__" : __main__()
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