checkIsTangle.py

def isTangle(a, b, c):
    if a <= 0 or b <= 0 or c <= 0:
        return False
    else:
        if a + b >= c and a + c >= b and a <= b + c:
            return True


def showInfo():
    count = 5
    while (count > 0):
        print('please input: ')
        a = input('a = ')
        b = input('b = ')
        c = input('c = ')
        count -= 1

        try:
            a = int(a)
            b = int(b)
            c = int(c)

            if isTangle(a, b, c):
                break
        except ValueError:
            print('Invalid input')

    print('Congrats')


showInfo()