code: def get_ticker(self, symbol=None):
          
          data = {}
          tick_path = 'market/allTickers'
          if symbol is not None:
              tick_path = 'market/orderbook/level1'
              data = {
                  'symbol': symbol
              }
          return self._get(tick_path, False, data=data)
docs: Get symbol tick
  
          https://docs.kucoin.com/#get-ticker
  
          :param symbol: (optional) Name of symbol e.g. KCS-BTC
          :type symbol: string
  
          .. code:: python
  
              all_ticks = client.get_ticker()
  
              ticker = client.get_ticker('ETH-BTC')
  
          :returns: ApiResponse
  
          .. code:: python
  
              {
                  "sequence": "1545825031840",      # now sequence
                  "price": "3494.367783",           # last trade price
                  "size": "0.05027185",             # last trade size
                  "bestBid": "3494.367783",         # best bid price
                  "bestBidSize": "2.60323254",      # size at best bid price
                  "bestAsk": "3499.12",             # best ask price
                  "bestAskSize": "0.01474011"       # size at best ask price
              }
  
          :raises: KucoinResponseException, KucoinAPIException