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Question

您好，我正在尝试为Benford发行版编写代码，但出现以下错误：

def leading_digit(n):
    while n >= 10:
        n = n//10
    return n

def Ben(k):
    results = []
    for i in range(k):
        random_number[i] = np.random.randint(10000)
        results.append(leading_digit(random_number[i]))
    return results

Ben(2)

错误消息：

---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-27-5811e9105b42> in <module>
----> 1 Ben(2)

<ipython-input-26-5df31a0e6a56> in Ben(k)
      2     results = []
      3     for i in range(k):
----> 4         random_number[i] = np.random.randint(10000)
      5         results.append(leading_digit(random_number[i]))
      6     return results

NameError: name 'random_number' is not defined

Answer 1

您应该使用一些值初始化random_number列表（random_number = [0] * k），因为它报告变量random_number未定义错误

def leading_digit(n):
    while n >= 10:
        n = n//10
    return n

def Ben(k):
    results = []
    random_number = [0] * k
    for i in range(k):
        random_number[i] = np.random.randint(10000)
        results.append(leading_digit(random_number[i]))
    return results

Ben(2)