BMI calculator

bmi_categories = {0:"Severely Underweight",
                  1:"Underweight",
                  2:"Normal",
                  3:"Overweight",
                  4:"Moderately Obese",
                  5:"Severely Obese",
                  6:"Morbidly Obese"}
STD_BMI_VALUES = (15, 18, 18.5, 25, 30, 35, 40, 60)

def get_bmi_category(bmi):
    for i in range(len(STD_BMI_VALUES)-1):
        mn, mx = STD_BMI_VALUES[i], STD_BMI_VALUES[i+1]
        if (bmi >= mn and bmi < mx): bmi = i
    return bmi_categories.get(bmi, "Uncategorized")

std = {"Height":(1.4, 2, 'meters'),"Weight":(35, 120, 'Kg')}

def get_user_input(_type, n='E'):
    mn, mx, unit = std[_type]
    try:
        _input = float(input(f"\n{n}nter your {_type} in {unit}: "))
        if not (_input >= mn and _input <= mx): raise Warning()
        return _input
    except Exception as e:
        print(("Invalid Input.", f"{_type} out of acceptable range.")[isinstance(e, Warning)])
    return get_user_input(_type, 'Please re-e')

weight, height = get_user_input('Weight'), get_user_input('Height')
rating = get_bmi_category(round(weight/height**2, 1))
print(f"Based on your weight of {weight} Kg, and your height of {height} meters, your BMI rating is {rating}")