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#!/usr/bin/python3 -O
############################################################################
# Copyright (c) 2015 Saint Petersburg State University
# Copyright (c) 2011-2014 Saint Petersburg Academic University
# All Rights Reserved
# See file LICENSE for details.
############################################################################
import sys
import os
# crop genome to first n basepairs
gf = open(sys.argv[1])
n = int(sys.argv[2])
ogf = open(sys.argv[3], 'w')
for line in gf:
ogf.write(line.strip() + ",_cropped_to_first_" + str(n) + "_nucleotides\n")
break
cnt = 0
for line in gf:
line = line.strip()
if (n <= 0):
break;
if n < len(line):
line = line[0:n]
ogf.write(line)
ogf.write('\n')
n -= len(line)
gf.close()
ogf.close()
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