Python 에서 문단 추출

#!/usr/bin/ruby
 
linenum  = ARGV[0].to_i
filename = ARGV[1]
 
if ARGV.size != 2 or linenum.to_s != ARGV[0]
  puts "Usage: ruby ./sample.rb linenum filename"
  puts "The linenum should be integer"
  puts "Example: ruby ./sample.rb  0 filename"
  puts "         ruby ./sample.rb 10 filename"
  exit
end
 
sharp_pos      = -1
dollar_pos     = -1
new_line_pos   = -1
new_line_count = 0
 
file = File.open(filename)
 
until file.eof?
 
  c = file.read(1)
 
  case c
  when "\n"
    if (new_line_count < linenum + 1) and (sharp_pos >= 0)
      new_line_pos = file.pos - 1
      new_line_count += 1
    end
  when "#"
    sharp_pos = file.pos - 1 if sharp_pos == -1
  when "$"
    dollar_pos = file.pos - 1 if dollar_pos == -1
  end
 
  break if sharp_pos > 0 and dollar_pos > 0 and new_line_count > linenum
end
 
if (sharp_pos >= 0 and dollar_pos > 0)
  file.seek(sharp_pos, IO::SEEK_SET)
  puts file.read(dollar_pos - sharp_pos + 1)
end
 
puts "--------------"
 
if (sharp_pos >= 0)
  file.seek(sharp_pos, IO::SEEK_SET)
  if (new_line_pos > 0)
    puts file.read(new_line_pos - sharp_pos)
  else
    puts file.readline
  end
end
 
file.close