docs: def get_top_exchanges(fsym, tsym, limit=5):
  	"""Get top exchanges by 24 hour trading volume for the currency pair.
  	
  	Args:
  		fsym: FROM symbol.
  		tsym: TO symbol.
  		limit: Number of results. Default value returns top 5 exchanges.
  
  	Returns:
  		Function returns a list containing a dictionary for each result:
  
  		[{'exchange': ..., 'fromSymbol': ..., 'toSymbole': ..., 
  		  'volume24h': ..., 'volume24hTo': ...}, 
  		 {...}, 
  		 ...]
  
  		The list is ordered based on the volume of the FROM currency starting 
  		with the highest value.
  	"""
  
  	# load data
  	url = build_url('exchanges', fsym=fsym, tsym=tsym, limit=limit)
  	data = load_data(url)
  
  	# price_data = data['Data']
  	# return [{'exchange': p['exchange'],
  	#		  'volume24hto': p['volume24hTo']} for p in price_data]
  
  	return data['Data']