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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 show(config, section, opt):
 """Prints option value from the config. Args: config (configobj.ConfigObj):
 config to work on. section (str):
 section name. opt (str):
 option name. """

        if section not in config.keys():
            raise ConfigError("section '{}' doesn't exist".format(section))

        if opt not in config[section].keys():
            raise ConfigError(
                "option '{}.{}' doesn't exist".format(section, opt)
            )

        logger.info(config[section][opt])