class Logger

def level=(severity)


Logger#sev_threshold= is an alias for Logger#level=.

logger.level = :error # => :error
logger.level = 'error' # => "error"
logger.level = 3 # => 3
logger.level = Logger::ERROR # => 3

Argument +severity+ may be an integer, a string, or a symbol:

See {Log Level}[rdoc-ref:Logger@Log+Level].
Sets the log level; returns +severity+. 
def level=(severity)
  if severity.is_a?(Integer)
    @level = severity
  else
    case severity.to_s.downcase
    when 'debug'
      @level = DEBUG
    when 'info'
      @level = INFO
    when 'warn'
      @level = WARN
    when 'error'
      @level = ERROR
    when 'fatal'
      @level = FATAL
    when 'unknown'
      @level = UNKNOWN
    else
      raise ArgumentError, "invalid log level: #{severity}"
    end
  end
end