code: def getline(file_or_script, line_number, opts=default_opts):
      
      filename = unmap_file(file_or_script)
      filename, line_number = unmap_file_line(filename, line_number)
      lines = getlines(filename, opts)
      if lines and line_number >=1 and line_number <= maxline(filename):
          line = lines[line_number-1]
          if get_option('strip_nl', opts):
              return line.rstrip('\n')
          else:
              return line
          pass
      else:
          return None
      return
docs: Get line *line_number* from file named *file_or_script*. Return None if
      there was a problem or it is not found.
  
      Example:
  
      lines = pyficache.getline("/tmp/myfile.py")