seems to fix float inaccuracies not too badly x)

precision_fixer.py

import math
import sys

CORRECTOR = ((4 - sys.float_info.max * sys.float_info.min) / 2.5)


def fix_float(value: float) -> float:
    if abs(value) < sys.float_info.epsilon:
        return 0.0

    corrector = math.copysign(CORRECTOR, value)
    epsilon = math.copysign(sys.float_info.epsilon, value)

    return value - epsilon + corrector


def main() -> None:
    x = 0.1 + 0.2
    fixed_x = fix_float(x)
    print(x, fixed_x)

    y = 0.2 + 0.4
    fixed_y = fix_float(y)
    print(y, fixed_y)

    # let's try with a result without approximation issues
    z = 1.2 + 3.5
    fixed_z = fix_float(z)
    print(z, fixed_z)  # still correct


if __name__ == "__main__":
    main()