生成指定長度的字串：
def getRandomSet(self, bits):
    """
    獲取隨機字串
    :param bits: 長度
    :return: 字串
    """
    num_set = [chr(i) for i in range(48, 58)]
    char_set = [chr(i) for i in range(97, 123)]
    total_set = num_set + char_set
    value_set = "".join(random.sample(total_set, bits))
    return value_set

if __name__ == '__main__':
    a = getRandomSet(50)
    print(a)

錯誤：

raise ValueError("Sample larger than population or is negative")
ValueError: Sample larger than population or is negative

random檔案中:

def sample(self,population,k)

因為使用random.sample()方式時,population這個引數的長度必須大於k，如果小於k，那麼就會提示ValueError: sample larger than population

解決：

def getRandomSet(self, bits):
    """
    獲取隨機字串
    :param bits: 長度
    :return: 字串
    """
    num_set = [chr(i) for i in range(48, 58)]
    char_set = [chr(i) for i in range(97, 123)]
    total_set = num_set + char_set
    value_set = "".join(random.sample(total_set, bits))
    return value_set

if __name__ == '__main__':
    a = getRandomSet(20)
    print(a)

結果：w492lm7tp8gnqfr3zdy1