尝试从列表中获取列表的长度，并根据每个列表的长度进行计数

# 获取列表长度
length = len(my_list)

# 根据每个列表的长度进行计数
from collections import Counter
length_counts = Counter(len(sub_list) for sub_list in list_of_lists)

// 获取列表长度
let length = myArray.length;

// 根据每个列表的长度进行计数
let lengthCounts = {};
listOfArrays.forEach(subArray => {
    let len = subArray.length;
    if (lengthCounts[len]) {
        lengthCounts[len]++;
    } else {
        lengthCounts[len] = 1;
    }
});

# Python示例
if my_list:
    length = len(my_list)
else:
    length = 0

# Python示例
length_counts = Counter(len(sub_list) for sub_list in list_of_lists if isinstance(sub_list, list))