Python：在十六进制中打印一个变量 [英] Python: print a variable in hex

问题描述

我试图找到一种在十六进制中打印字符串的方法。例如，我有这个字符串，然后转换为它的十六进制值。

  my_string =deadbeef
 my_hex = my_string.decode（'hex'）
  

如何打印 my_hex as 0xde 0xad 0xbe 0xef ？



为了让我的问题变得清晰...假设我有一些数据，比如 0x01，0x02，0x03，0x04 存储在一个变量中。现在我需要用十六进制打印它，以便我可以读取它。我想我正在寻找一个python相当于 printf（％02x，my_hex）。我知道有 print'{0：x}'.format（）但这不适用于 my_hex 它也不会填零。

你的意思是你有一串字节在 my_hex 中你想以十六进制数字打印出来，对吗？例如，从你的例子：

 >>> my_string =deadbeef
>>> my_hex = my_string.decode（'hex'）＃python 2 only 
>>>打印my_hex 
 
  

以下是一种方法：

 >>> print.join（my_hex中的n（hex（ord（n）））
 0xde 0xad 0xbe 0xef 
  

理解将字符串分解为字节， ord（）将每个字节转换为相应的整数，并且 hex（）格式化从 0x ## 中的每个整数。然后我们在两者之间添加空格。

额外奖励：如果您对unicode字符串使用此方法，则理解将为您提供unicode字符（不是字节），您将获得即使它们大于两位数，也是适当的十六进制值。

I'm trying to find a way to print a string in hex. For example I have this string which I then convert to its hex value.

my_string = "deadbeef"
my_hex = my_string.decode('hex')

How can I print my_hex as 0xde 0xad 0xbe 0xef? Thank you.

To make my question clear... Let's say I have some data like 0x01, 0x02, 0x03, 0x04 stored in a variable. Now I need to print it in hex so that I can read it. I guess I am looking for a python equivalent of printf("%02x", my_hex). I know there is print '{0:x}'.format() but that won't work with my_hex and it also won't pad with zeroes.

解决方案

You mean you have a string of bytes in my_hex which you want to print out as hex numbers, right? E.g., from your example:

>>> my_string = "deadbeef"
>>> my_hex = my_string.decode('hex')  # python 2 only
>>> print my_hex
Þ ­ ¾ ï

Here's one way to do it:

>>> print " ".join(hex(ord(n)) for n in my_hex)
0xde 0xad 0xbe 0xef

The comprehension breaks the string into bytes, ord() converts each byte to the corresponding integer, and hex() formats each integer in the from 0x##. Then we add spaces in between.

Bonus: If you use this method with unicode strings, the comprehension will give you unicode characters (not bytes), and you'll get the appropriate hex values even if they're larger than two digits.

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