Python3 bytes与hex字符串之间相互转换

环境：Python 3.6

1、字符串转bytes

'''
string to bytes
eg:

'0123456789ABCDEF0123456789ABCDEF'
b'0123456789ABCDEF0123456789ABCDEF'
'''

def stringTobytes(str):
    return bytes(str,encoding='utf8')

2、bytes转字符串

'''
bytes to string
eg:

b'0123456789ABCDEF0123456789ABCDEF'

'0123456789ABCDEF0123456789ABCDEF'
'''

def bytesToString(bs):
    return bytes.decode(bs,encoding='utf8')

3、十六进制字符串转bytes

'''
hex string to bytes
eg:

'01 23 45 67 89 AB CD EF 01 23 45 67 89 AB CD EF'

b'x01#Egx89xabxcdxefx01#Egx89xabxcdxef'
'''

def hexStringTobytes(str):
    str = str.replace(" ", "")
    return bytes.fromhex(str)
    # return a2b_hex(str)

4、bytes转十六进制字符串

'''
bytes to hex string 
eg:

b'x01#Egx89xabxcdxefx01#Egx89xabxcdxef'

'01 23 45 67 89 AB CD EF 01 23 45 67 89 AB CD EF'
'''

def bytesToHexString(bs):
    # hex_str = ''
    # for item in bs:
    #     hex_str += str(hex(item))[2:].zfill(2).upper() + " "
    # return hex_str
    return ''.join(['%02X ' % b for b in bs])