import pandas as pd import pybitflyer import time from datetime import datetime # size : 注文数量、price : 価格(省略可) def buy(api, size, product_code = "BTC_JPY", child_order_type = "MARKET", price = None, minute_to_expire = 10000, time_in_force = "GTC"): if price is None: buy_btc = api.sendchildorder(product_code=product_code, child_order_type=child_order_type, side="BUY",size=size, minute_to_expire=minu