Here's a very terse version of @JavDomGum's answer, for those that want something quick-and-dirty and which is easier to paste into a debug console.

import struct
b2f = lambda bi: f'{struct.unpack(">d", int(bi, 2).to_bytes(8))[0]}'
f2b = lambda fl: f'{struct.unpack(">Q", struct.pack(">d", fl))[0]:064b}'