UnboundLocalError：分配前已引用局部变量“ curr_cnt”

Question

这是代码：

def mostFrequent(num1,n):
    for i in range(1,n):
        if (num1[i] == num1[i-1]):
            curr_cnt += 1
        else :
            if (curr_cnt > max_cnt):
                max_cnt = curr_cnt
                res = num1[i-1]
                curr_cnt = 1
        if (curr_cnt > max_cnt):
            max_cnt = curr_cnt
            res = num1[n-1]
        return res

num1 = data['num1'].values
num1.sort()
n = len(num1);max_cnt = 1;res = num1[0];curr_cnt = 1

print(mostFrequent(num1, n))

我在做什么错了？

Answer 1

某些变量在mostFrequent函数外部初始化。如果要在函数内部使用它们，它们必须是可用的。这是解决方法，

def mostFrequent(num1,n):
    max_cnt = 1
    res = num1[0]
    curr_cnt = 1
    for i in range(1,n):