[英]How do I represent a hex value in a python string?
I have some code in C that expects char buffer that looks like this: 我在C中有一些代码需要char缓冲区,如下所示:
char buf[ 64 ];
buf[0] = 0x01;
buf[1] = 0x11;
buf[2] = 0x61;
buf[3] = 0x08;
buf[4] = 0x01;
I am trying to create this buffer in Python, and pass the pointer to the C code. 我试图在Python中创建此缓冲区,并将指针传递给C代码。 I created buf as follows, 我创建了如下buf,
buf = create_string_buffer('0x01 0x11 0x61 0x08 0x01', 64)
but when I pass the pointer to my C code, it looks like the C code is reading the ASCII code for 01, not a hex literal. 但是当我将指针传递给我的C代码时,看起来C代码正在读取01的ASCII代码,而不是十六进制文字。
How do I fix this? 我该如何解决?
In Python hex literals are escaped by \\x
在Python中,十六进制文字由\\x
转义
so in your case the string to pass into your c function would be written as 所以在你的情况下,传递给你的c函数的字符串将被写为
'\x01\x11\x61\x08\x01'
There is a table here in the python docs listing the escape sequences that python understands. 有一个表在这里的python文档列出了蟒蛇理解转义序列。
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