有大佬可以指点一下吗

unit_price = 0.53
eletronicNumAndPirce = input('请输入用月电量(单位：千瓦/时)和电价上调 X 的值(单位：元)，中间用空格分隔：')
try:
    eletronicNum,beyongPrice = eletronicNumAndPirce.split()
    eletronicNum = float(eletronicNum)
    beyongPrice = float(beyongPrice)
except Exception:
    exit('输入有误，请重新操作')

if eletronicNum <= float(50.0):
    total_cost = round(unit_price * eletronicNum ,2)
    print('cost={}'.format(total_cost))
else:
    beyong_cost = float(0.53 + beyongPrice) * (eletronicNum - 50.0)
    total_cost = round(unit_price * 50.0 + beyong_cost , 2)
    print('cost={}'.format(total_cost))