将32位int值转换为float

Question

I have a program that reads from a file that grabs 4 bytes from that file. The below hex should be 0.5 in float:

00 00 00 3F

I currently have a method that displays integer values and would like to convert the integer from 1056964608 to 0.5. This should also be able to handle negative float numbers. Can someone explain to me how this can be done in Python 2.6?

Answer 1

Using the struct module:

>>> struct.unpack("<f", "\x00\x00\x00\x3f")
(0.5,)

If you really need to convert from the integer, rather than just from the bytes, you can do that too:

>>> struct.unpack("<f", struct.pack("<I", 1056964608))
(0.5,)