Generates a random floating point zero, with N decimal places randomized between a lower (L) and upper (U) bound.

zero_rand_decimal_places.py

def zero_rand_places(n: int = 5, l: int = 4, u: int = 5) -> float:
    '''
        Generates a random floating point zero, with n decimal places between
        0.1  and 0.9, with l and u clamping the lower and upper bounds of the
        number, e.g. with l = 4, u = 5, n = 3: 0.400 <= R <= 0.599
    '''

    lb: int = 0.1 * 10**n
    ub: int = 0.1 * 10 ** (n + 1) - 1

    lc: int = lb * l
    uc: int = ub - (ub - lb + 1 - lb * u)

    return float(randint(lc, uc)) / (10**n)