(int_variable).to_bytes(bytes_length, byteorder='big'|'little').hex()

例如:

>>> (434).to_bytes(4, byteorder='big').hex()
'000001b2'
>>> (434).to_bytes(4, byteorder='little').hex()
'b2010000'

这将把一个整数转换成带有0x前缀的2位十六进制字符串:

strHex = "0x%0.2X" % integerVariable

我想要一个随机整数转换成一个六位数十六进制字符串与#在开始。为了得到这个，我用了

"#%6x" % random.randint(0xFFFFFF)

注意，对于大值，hex()仍然有效(其他一些答案不适用):

x = hex(349593196107334030177678842158399357)
print(x)

Python 2: 0x4354467b746f6f5f736d616c3f7dl 蟒蛇3:0x4354467b746f6f5f736d616c3f7d

对于解密的RSA消息，可以执行以下操作:

import binascii

hexadecimals = hex(349593196107334030177678842158399357)

print(binascii.unhexlify(hexadecimals[2:-1])) # python 2
print(binascii.unhexlify(hexadecimals[2:])) # python 3

使用format()，按照format-examples，我们可以做到:

>>> # format also supports binary numbers
>>> "int: {0:d};  hex: {0:x};  oct: {0:o};  bin: {0:b}".format(42)
'int: 42;  hex: 2a;  oct: 52;  bin: 101010'
>>> # with 0x, 0o, or 0b as prefix:
>>> "int: {0:d};  hex: {0:#x};  oct: {0:#o};  bin: {0:#b}".format(42)
'int: 42;  hex: 0x2a;  oct: 0o52;  bin: 0b101010'

对于Python >= 3.6，使用f-string格式:

>>> x = 114514
>>> f'{x:0x}'
'1bf52'
>>> f'{x:#x}'
'0x1bf52'