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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def load_extra(cls, filename):
 """Loads extra JSON configuration parameters from a file on the filesystem. Args: filename: str, the filename to open. Returns: bool: True if the extra configuration parameters were read. """

    try:
      with open(filename, 'rb') as configuration_file:
        cls.load_extra_data(configuration_file.read())
        sys.stderr.write("Config successfully loaded from {0:s}\n".format(
            filename))
        return True
    except IOError:
      return False