python 2.7相当于内置方法int.from_bytes

I'm trying to make my project python2.7 and 3 compatible and python 3 has the built in method int.from_bytes. Does the equivalent exist in python 2.7 or rather what would be the best way to make this code 2.7 and 3 compatible?

我正在尝试使我的项目python2.7和3兼容，而python 3具有内置方法int.from_bytes。是否存在python 2.7中的等价物，或者说这个代码2.7和3兼容的最佳方法是什么？

>>> int.from_bytes(b"f483", byteorder="big")
1714698291

3 个解决方案

#1

You can treat it as an encoding (Python 2 specific):

您可以将其视为编码（特定于Python 2）：

>>> int('f483'.encode('hex'), 16)
1714698291

Or in Python 2 and Python 3:

或者在Python 2和Python 3中：

>>> int(codecs.encode(b'f483', 'hex'), 16)
1714698291

The advantage is the string is not limited to a specific size assumption. The disadvantage is it is unsigned.

优点是字符串不限于特定大小的假设。缺点是它是未签名的。

#2

struct.unpack(">i","f483")[0]

maybe?

也许？

> means big-endian and i means signed 32 bit int

>表示big-endian，我的意思是签名32位int

另见：https：//docs.python.org/2/library/struct.html

#3

Use the struct module to unpack your bytes into integers.

使用struct模块将字节解压缩为整数。

import struct
>>> struct.unpack("<L", "y\xcc\xa6\xbb")[0]
3148270713L

#1