#大端與小端
print((1024).to_bytes(2, byteorder = 'big'))
print((65536).to_bytes(8, byteorder = 'little'))
#有符號與無符號
print((-1024).to_bytes(4, byteorder = 'big', signed = True))#b'\xff\xff\xfc\x00'
print((-1024).to_bytes(4, byteorder = 'little', signed = True))#b'\x00\xfc\xff\xff'
#異常現象（把有些數字直接根據ASCII碼表翻譯過來了）
print((3124).to_bytes(2, byteorder = 'big')) # why \x0c4 => \x0c + 4(0x34)
print((3140).to_bytes(2, byteorder ='little')) # why D\x0c => D(0x44) + 0x0c
#把十進制轉換成十六進制
print('%x' % 3345) #d11
print('%x' % 3124) #c34
#把十六進制轉換成十進制
print(0xd11) #3345
print(0xc34) #3124
b = b'china\r\nus'
print(type(b)) #<class 'bytes'>
#將其他編碼的字符串轉換成Unicode編碼
s = b.decode()
print(s)#china us
#將Unicode編碼轉換成其他進制編碼
print(s.encode())#b'china\r\nus'
