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pythonnumpyfloating-pointprecisionieee-754
Kaio
Kaio

Reputation: 53

Decimal to binary Half-Precision IEEE 754 in Python

I was only able to convert a decimal into a binary single-precision IEEE754, using the struct.pack module, or do the opposite (float16 or float32) using numpy.frombuffer

Is it possible to convert a decimal to a binary half precision floating point, using Numpy?

I need to print the result of the conversion, so if I type "117.0", it should print "0101011101010000"

Upvotes: 5

Views: 8517

Answers (2)

jfs
jfs

Reputation: 414915

if I type "117.0", it should print "0101011101010000"

>>> import numpy as np
>>> bin(np.float16(117.0).view('H'))[2:].zfill(16)
'0101011101010000'

.view('H') reinterprets the memory occupied by the float16 value as an unsigned integer.

Upvotes: 12

dlask
dlask

Reputation: 9002

The float16 method suggested by Mark Dickinson has to be followed by the tostring() method to obtain the required binary representation:

data = numpy.float16(2.3).tostring()

Upvotes: 3

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