import math,sys

def Exposure2Intensity(exposure): 
    exp = float(exposure)
    result = math.pow(2,exp)
    print(result)

Exposure2Intensity(0)

def Intensity2Exposure(intensity):
    inarg = float(intensity)
    
    if inarg == 0:
        print("Exposure of zero intensity is undefined.")
        return
    
    if inarg < 1e-323:
        inarg = max(inarg, 1e-323)
        print("Exposure of negative intensities is undefined. Clamping to a very small value instead (1e-323)")
    
    result = math.log(inarg, 2)
    print(result)

Intensity2Exposure(0.1)

https://github.com/Sosoyan/make-hdr

Feature notes

• Merge up to 16 inputs with 8, 10 or 12 bit depth processing
• User friendly logarithmic Tone Mapping controls within the tool
• Advanced controls such as Sampling rate and Smoothness

Available at cross platform on Linux, MacOS and Windows Works consistent in compositing applications like Nuke, Fusion, Natron.

NOTE: The goal is to clean the initial individual brackets before or at merging time as much as possible.
This means:

• keeping original shooting metadata
• de-fringing
• removing aberration (through camera lens data or automatically)
• at 32 bit
• in ACEScg (or ACES) wherever possible