bytes型をintにして計算
b'0x7f613623eb80' の中身0x7f613623eb80をintの計算に使いたい!
code:python
>> x
b'0x7f613623eb80'
>> x.decode()
'0x7f613623eb80' # str
>> int(x.decode(), 16)
140055496878976 # == 0x7f613623eb80
>> int(x.decode(), 16) - 0x3eb80
140055496622080 # == 0x7f6136200000