Convert bytestring to float in python

I am working on a project where I read data which is written into memory by a Delphi/Pascal program using memory mapping on a Windows PC. I am now mapping the memory again using pythons mmap and the handle given by the other program and as expected get back a bytestring.

I know that this should represent 13 8-byte floating-point numbers but I do not know how I could correctly convert this bytestring back into those. I also know the aproximate value of the floating-point numbers to check my results.

The code I am using to get the bytestring looks like this:

import mmap
import time

size_map = 13*8
mmf_name = "MMF"
mm = mmap.mmap(-1, size_map, mmf_name, access=mmap.ACCESS_READ)

while True:
    mm.seek(0)
    mmf = mm.read()
    print(mmf)
    
    time.sleep(0.04)
    
mm.close()

For now I am just running the code again every 40 ms because the data is written every 40 ms into memory.

The output looks something like this:

b'xcdxccxccxe0xe6vxb9xbfx9ax99x99!Fxcd&@xf5xa2xc5,.xafxbdxbfx95xb0xeaxb5xaenxd9?333/x9bx165@x00x00x00hx89D1xc08xd1xc3xc3x92x82xf7?tAx8fBxd6Gx04@]xc1xedx98rAx07@x9ax99x99x99x99x191@x00x00x00xc0xccxcc=@x00x00x00xc0x1eE7@x00x00x00x00xb8x1ex1a@'

I tried struct.unpack(), .decode() and float.fromhex() to somehow get back the right value but it didn’t work. For example the first 8 bytes should roughly represent a value between -0.071 and -0.090.

The problem seems to be very basic but I still wasn’t able to figure it out by now. I would be very grateful for any suggestions how to deal with this and get the right floating-point values from a bytestring. If I am missing any needed Information I am of course willing do give that too.

Thank you!