code: def initialize(context):
      context.assets = [symbol("eth_btc"), symbol("eth_usdt")]
  
imports: from catalyst import run_algorithm
  from catalyst.api import order, record, symbol
  import pandas
  from catalyst.exchange.utils.stats_utils import get_pretty_stats
label_desc: Use image node_id 1 for calling a global function with example usage: initialize(context) without return types