from datetime import datetime
from ibkr import Client as IBKR, OptionLeg
from ibkr.option_type import CALL, PUT
from ibkr.order_action import BUY, SELL

client = IBKR()

symbol, sub_symbol = 'SPX', 'SPXW'
expiration = datetime.now()
short_leg = OptionLeg(symbol, expiration, 4525.0, CALL, SELL, sub_symbol)
long_leg = OptionLeg(symbol, expiration, 4550.0, CALL, BUY, sub_symbol)

client.submit_combo_option_order([short_leg, long_leg], 1)