need help finding error on my python code

Question

I am Writing a program to prompt for a score between 0.0 and 1.0. If the score is out of range print an error. If the score is between 0.0 and 1.0, print a grade using the following table:Score Grade >= 0.9 A>= 0.8 B>= 0.7 C>= 0.6 D< 0.6 F.

To give an example of what it should do at the end it is:

Enter score: 0.95, A Enter score: perfect, Invalid input Enter score: 10.0, Invalid input Enter score: 0.75, C Enter score: 0.5, F

This is the code I have now:

score = input("Enter Score: ")


try:
    score= float(score)
    if(score >= 0.0 and score <= 1.0):
        if (score>= 0.9):
            print("A")
        elif (score>= 0.8):
            print("B")
        elif(score>= 0.7):
            print("C")
        elif (score>= 0.6):
            print("D")
        elif (score < 0.6):
            print("F")
    else:
        print("Invalid input")

I cant seem to get it up and running. Any help would be appreciated.

Answer 1

Green-Avocado has a great answer. I would add a while loop to retry until the input is valid;

# loop until complete
while True:
    score = input("Enter Score: ")

    # let's try this 
    try:
        score = float(score)
        if score >= 0.0 and score <= 1.0:
            if score >= 0.9:
                print("A")
            elif score >= 0.8:
                print("B")
            elif score >= 0.7:
                print("C")
            elif score >= 0.6:
                print("D")
            elif score < 0.6:
                print("F")

            # exit the loop on completion
            break

        # else raise an exception
        raise

    # if problem with float(score) or exception raised
    except:
        print("Invalid input")