code: def fastaReadHeaders(fasta):
      
      headers = []
      fileHandle = open(fasta, 'r')
      line = fileHandle.readline()
      while line != '':
          assert line[-1] == '\n'
          if line[0] == '>':
              headers.append(line[1:-1])
          line = fileHandle.readline()
      fileHandle.close()
      return headers
docs: Returns a list of fasta header lines, excluding