old_contents: from Bio import SeqIO
  genome = list(SeqIO.parse("/home/maxwell.a.sherman/genomes/ecoli.fa", "fasta"))
  k = 3 # k-mers
  
  kmers = {}
  for i in range(0, len(genome[0]) - k + 1):
      if str(genome[0].seq[i:i + k]) not in kmers:
          kmers[str(genome[0].seq[i:i + k])] = 0
      else:
          kmers[str(genome[0].seq[i:i + k])] += 1
  
  print kmers
new_contents: from Bio import SeqIO
  genome = list(SeqIO.parse("/home/maxwell.a.sherman/genomes/ecoli.fa", "fasta"))
  k = raw_input("Lengh of k for k-mers: ")
  
  kmers = {}
  for i in range(0, len(genome[0]) - k + 1):
      if str(genome[0].seq[i:i + k]) not in kmers:
          kmers[str(genome[0].seq[i:i + k])] = 0
      else:
          kmers[str(genome[0].seq[i:i + k])] += 1
  
  print kmers
subject: Add user input