code: def sample_lines(lines, n):
      '''Draw a sample of n lines from filename, largely evenly.'''
      if len(lines) <= n:
          return ''.join(lines)
      else:
          m = len(lines)
          return ''.join([lines[x * m // n + m // (2 * n)] for x in range(n)]f sample_lines(lines, n):
      '''Draw a sample of n lines from filename, largely evenly.'''
      if len(lines) <= n:
          return ''.join(lines)
      else:
          m = len(lines)
          return ''.join([lines[x * m // n + m // (2 * n)] for x in range(n)])
docs: Draw a sample of n lines from filename, largely evenly.