https://www.cnblogs.com/fat39/p/7159881.html
https://blog.csdn.net/powerdoom/article/details/62218516
Python进制转换和补零
https://blog.csdn.net/iridescent_mian/article/details/89061212
python数据类型转化
https://blog.csdn.net/zhubao124/article/details/79416892
https://www.cnblogs.com/klb561/p/9211268.html
//学会join方法与strip方法
https://blog.csdn.net/qq_29011249/article/details/88077732
print("%x" %15)
print("%2x" %15)
print("%02x" %15)
print("%04x" %15)
print("%#x" %15)
print("%#2x" %15)
print("%#02x" %15)
print("%#04x" %15)
原文：https://www.cnblogs.com/retry/p/11729314.html