生成2-9范围内所有可能的5位数字组合的算法，没有重复的数字

def generate_combinations():
    result = []
    for num1 in range(2, 10):
        for num2 in range(2, 10):
            if num2 == num1:
                continue
            for num3 in range(2, 10):
                if num3 == num1 or num3 == num2:
                    continue
                for num4 in range(2, 10):
                    if num4 == num1 or num4 == num2 or num4 == num3:
                        continue
                    for num5 in range(2, 10):
                        if num5 == num1 or num5 == num2 or num5 == num3 or num5 == num4:
                            continue
                        combination = str(num1) + str(num2) + str(num3) + str(num4) + str(num5)
                        result.append(combination)
    return result

combinations = generate_combinations()
print(combinations)