Project Euler 38

def PE38():
    answer = [0]
    x = 1
    while x < 9876:
        y = 1
        bob = ''
        while len(bob) < 10:
            if len(bob + str(x * y)) > 9:
                break
            elif '0' in str(x * y):
                break
            else:
                bob += str(x * y)
                y += 1
        checker = []
        for number in bob:
            checker.append(number)
        if len(set(checker)) == 9 and len(checker) == 9 and '0' not in checker and int(bob) > answer[-1]:
            answer.append(int(bob))
            print(answer[-1])
        x += 1
    return answer[-1]

PE38()