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1 #!/usr/bin/env python
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2 # This code exists in 2 places: ~/datatypes/converters and ~/tools/fasta_tools
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3 """
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4 Input: fasta (input file), tabular (output file), int (truncation of id), int (columns from description)
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5 Output: tabular
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6 format convert: fasta to tabular
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7 """
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8
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9 import sys, os
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10
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11 def stop_err( msg ):
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12 sys.stderr.write( msg )
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13 sys.exit()
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14
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15 def __main__():
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16 if len(sys.argv) != 5:
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17 stop_err("Wrong number of argument. Expect four (fasta, tabular, truncation, columns)")
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18 infile = sys.argv[1]
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19 outfile = sys.argv[2]
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20 keep_first = int( sys.argv[3] )
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21 descr_split = int( sys.argv[4] )
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22 fasta_title = fasta_seq = ''
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23 if keep_first == 0:
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24 keep_first = None
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25 elif descr_split == 1:
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26 #Added one for the ">" character
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27 #(which is removed if using descr_split > 1)
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28 keep_first += 1
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29 if descr_split < 1:
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30 stop_err("Bad description split value (should be 1 or more)")
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31 out = open( outfile, 'w' )
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32 for i, line in enumerate( open( infile ) ):
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33 line = line.rstrip( '\r\n' )
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34 if not line or line.startswith( '#' ):
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35 continue
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36 if line.startswith( '>' ):
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37 #Don't want any existing tabs to trigger extra columns:
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38 line = line.replace('\t', ' ')
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39 if i > 0:
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40 out.write('\n')
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41 if descr_split == 1:
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42 out.write(line[1:keep_first])
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43 else:
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44 words = line[1:].split(None, descr_split-1)
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45 #apply any truncation to first word (the id)
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46 words[0] = words[0][0:keep_first]
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47 #pad with empty columns if required
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48 words += [""]*(descr_split-len(words))
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49 out.write("\t".join(words))
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50 out.write('\t')
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51 else:
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52 out.write(line)
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53 if i > 0:
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54 out.write('\n')
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55 out.close()
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56
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57 if __name__ == "__main__" : __main__()
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