Python Datatype Conversions

​​​​​​python - Convert Bytes to Floating Point Numbers? - Stack Overflow

==> struct

Python struct pack, unpack - JournalDev

official doc: struct — Interpret bytes as packed binary data — Python 3.7.12 documentation

note:

e

(6)

float

2

(4)

4. For the 'f', 'd' and 'e' conversion codes, the packed representation uses the IEEE 754 binary32, binary64 or binary16 format (for 'f', 'd' or 'e' respectively), regardless of the floating-point format used by the platform.

6. The IEEE 754 binary16 “half precision” type was introduced in the 2008 revision of the IEEE 754 standard. It has a sign bit, a 5-bit exponent and 11-bit precision (with 10 bits explicitly stored), and can represent numbers between approximately                         ​​​​​​​        ​​​​​​​6.1e-05 and 6.5e+04 at full precision. This type is not widely supported by C compilers: on a typical machine, an unsigned short can be used for storage, but not for math operations. See the Wikipedia page on the half-precision floating-point format for more information.

python - Convert numpy array of float32 data type to hex format - Stack Overflow

fromhex — Python Reference (The Right Way) 0.1 documentation

a hex string in the example below is really just a string of bytes in hexadecimal representation

python - Convert hex to float - Stack Overflow

==> fromhex() is a class specific method ==> the best answer in the example use bytes.fromhex() to get a packed buffer, while float.fromhex() requires a entirely different style of hex string. 

suggestion: use numpy.ndarray.tobytes() ==> give python bytes and can convert to bytes in hex form by:

        result = "0x"
		for byte in list(datum.tobytes())[::-1]:
			result += hex(byte)[2:].zfill(2) #byte converts to 2 hex. digits
		return result