How to flag a given value based on a range rule

I’ve flags, each range of value has a flag.
for ex :

• value = 0 is D
• value > 0 and < 0.2 is C
• value >=0.2 and <=0.8 is B
• value > 0.8 is A

flag = ["A", "B", "C", "D"]

def get_flag(value) : 
            if value == 0: return "D"
            elif value > 0.8: return "A"
            elif value <=0.8 and value >= 0.2: return "B"  
            else: return "C"

i think this implementation is annoying and not algorthmically pretty to see, any suggestions so i can get the correct index in python, i thought about modulo and div but values are floats between 0 and 1.

>Solution :

You don’t need elif and else here, since return ends the execution of the function (so that lines after a return are not executed if the preceding return is triggered):

def get_flag(value) : 
    if value == 0: return "D"
    if value < 0.2: return "C"
    if value <= 0.8: return "B"
    return "A"