class_docstr: A pair of financial instruments to be traded on a specific exchange.
  
  Parameters
  ----------
  exchange : `Exchange`
      An exchange that contains the `pair` for trading.
  pair : `TradingPair`
      A trading pair available on the `exchange`.
code: def __init__(self, exchange: "Exchange", pair: "TradingPair"):
      self.exchange = exchange
      self.pair = pair
  
file_path: tensortrade/tensortrade/oms/instruments/exchange_pair.py
imports: from decimal import Decimal
label_desc: Use image node_id 1 to create a new ExchangePair object  with example: obj = ExchangePair(exchange, pair)