How to keep looping until the user input is valid ?

[KyawMyo]

def get_valid_input(value):
    while True:
        try:
            return float(input(value))
        except ValueError:
            print('Oops, that was not a valid number. Try again...')

def get_valid_cable_size(cableSize):
    while True:
        try:
            if cableSize in (25, 35, 50, 70, 95, 120, 150, 195, 250, 300, 500):
                return cableSize
                break
        except:
            print('Please enter a valid cable size')

def calculate_set_of_cable(amp, cableSize):
    if cableSize == 25:
        return amp / 53 #53 is current carry capacity of 25sqmm cable
    elif cableSize == 35:
        return amp / 71 #71 is current carry capacity of 35sqmm cable
        # the code not ended yet, until cable size is 500sqmm..

if __name__ == '__main__':
    while True:
        amp = get_valid_input('Please enter an Ampere:')
        cableSize = get_valid_input('Please enter the cable size:')
        cableSize = get_valid_cable_size(cableSize)
        set_of_cable = calculate_set_of_cable(amp, cableSize)
        print(f'The cables for {amp} ampere are {set_of_cable:.2f} sets per phase')
        print ('The program end here, Good Luck!!\n----------------------')

The code don't work, if I input the value not in tuple, the program doesn't loop until get corrected. Please help...I really no idea how to do that....Just 2 and half months python journey........