Calling functions by shell

Question

Write the function maior_primo that takes an integer greater than or equal to 2 as a parameter and returns the largest prime number less than or equal to the number passed to the function.

Examples of Python shell execution:

>>> maior_primo(100)
97

>>> maior_primo(7)
7

Tip: write a function éPrimo(k) and make a loop through the numbers to the given number checking whether the number is prime or not; if it is, keep it in a variable. At the end of the loop, the value stored in the variable is the largest prime found.

For IDE I did it in a way and it worked, but the exercise requires that it is for shell and it doesn’t work.

My code is like this:

#-----------------------------------------------------
def eh_primo(n):

    primo = True
    i = 2
    while i <= n/2 and primo:
        if n % i == 0:
            primo = False
            n = int(input("Digite um inteiro: "))
        i += 1

    return primo

#-----------------------------------------------------

def maior_primo(x, y):
    if eh_primo(x > y):
        return x
    else:
        return y